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rocksdb/utilities/transactions/transaction_test.cc
Maysam Yabandeh 5c0e304170 WritePrepared: Clarify the need for two_write_queues in unordered_write (#5313) 
Summary:
WritePrepared transactions when configured with two_write_queues=true offers higher throughput with unordered_write feature without however compromising the rocksdb guarantees. This is because it performs ordering among writes in a 2nd step that is not tied to memtable write speed. The 2nd step is naturally provided by 2PC when the commit phase does the ordering as well. Without 2PC, the 2nd step would only be provided when we use two_write_queues=true, where WritePrepared after performing the writes, in a 2nd step uses the 2nd queue to assign order to the writes.
The patch clarifies the need for two_write_queues=true in the HISTORY and inline comments of unordered_writes. Moreover it extends the stress tests of WritePrepared to unordred_write.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5313

Differential Revision: D15379977

Pulled By: maysamyabandeh

fbshipit-source-id: 5b6f05b9b59285dcbf3b0532215ba9fe7d926e00
2019-05-20 07:49:20 -07:00

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#ifndef ROCKSDB_LITE
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
#include "utilities/transactions/transaction_test.h"
#include <algorithm>
#include <functional>
#include <string>
#include <thread>
#include "db/db_impl.h"
#include "rocksdb/db.h"
#include "rocksdb/options.h"
#include "rocksdb/perf_context.h"
#include "rocksdb/utilities/transaction.h"
#include "rocksdb/utilities/transaction_db.h"
#include "table/mock_table.h"
#include "util/fault_injection_test_env.h"
#include "util/random.h"
#include "util/string_util.h"
#include "util/sync_point.h"
#include "util/testharness.h"
#include "util/testutil.h"
#include "util/transaction_test_util.h"
#include "utilities/merge_operators.h"
#include "utilities/merge_operators/string_append/stringappend.h"
#include "utilities/transactions/pessimistic_transaction_db.h"
#include "port/port.h"
using std::string;
namespace rocksdb {
INSTANTIATE_TEST_CASE_P(
DBAsBaseDB, TransactionTest,
::testing::Values(
std::make_tuple(false, false, WRITE_COMMITTED, kOrderedWrite),
std::make_tuple(false, true, WRITE_COMMITTED, kOrderedWrite),
std::make_tuple(false, false, WRITE_PREPARED, kOrderedWrite),
std::make_tuple(false, true, WRITE_PREPARED, kOrderedWrite),
std::make_tuple(false, true, WRITE_PREPARED, kUnorderedWrite),
std::make_tuple(false, false, WRITE_UNPREPARED, kOrderedWrite),
std::make_tuple(false, true, WRITE_UNPREPARED, kOrderedWrite)));
INSTANTIATE_TEST_CASE_P(
DBAsBaseDB, TransactionStressTest,
::testing::Values(
std::make_tuple(false, false, WRITE_COMMITTED, kOrderedWrite),
std::make_tuple(false, true, WRITE_COMMITTED, kOrderedWrite),
std::make_tuple(false, false, WRITE_PREPARED, kOrderedWrite),
std::make_tuple(false, true, WRITE_PREPARED, kOrderedWrite),
std::make_tuple(false, true, WRITE_PREPARED, kUnorderedWrite),
std::make_tuple(false, false, WRITE_UNPREPARED, kOrderedWrite),
std::make_tuple(false, true, WRITE_UNPREPARED, kOrderedWrite)));
INSTANTIATE_TEST_CASE_P(
StackableDBAsBaseDB, TransactionTest,
::testing::Values(
std::make_tuple(true, true, WRITE_COMMITTED, kOrderedWrite),
std::make_tuple(true, true, WRITE_PREPARED, kOrderedWrite),
std::make_tuple(true, true, WRITE_UNPREPARED, kOrderedWrite)));
// MySQLStyleTransactionTest takes far too long for valgrind to run.
#ifndef ROCKSDB_VALGRIND_RUN
INSTANTIATE_TEST_CASE_P(
MySQLStyleTransactionTest, MySQLStyleTransactionTest,
::testing::Values(
std::make_tuple(false, false, WRITE_COMMITTED, kOrderedWrite, false),
std::make_tuple(false, true, WRITE_COMMITTED, kOrderedWrite, false),
std::make_tuple(false, false, WRITE_PREPARED, kOrderedWrite, false),
std::make_tuple(false, false, WRITE_PREPARED, kOrderedWrite, true),
std::make_tuple(false, true, WRITE_PREPARED, kOrderedWrite, false),
std::make_tuple(false, true, WRITE_PREPARED, kOrderedWrite, true),
std::make_tuple(false, true, WRITE_PREPARED, kUnorderedWrite, false),
std::make_tuple(false, true, WRITE_PREPARED, kUnorderedWrite, true)));
#endif // ROCKSDB_VALGRIND_RUN
TEST_P(TransactionTest, DoubleEmptyWrite) {
WriteOptions write_options;
write_options.sync = true;
write_options.disableWAL = false;
WriteBatch batch;
ASSERT_OK(db->Write(write_options, &batch));
ASSERT_OK(db->Write(write_options, &batch));
// Also test committing empty transactions in 2PC
TransactionOptions txn_options;
Transaction* txn0 = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn0->SetName("xid"));
ASSERT_OK(txn0->Prepare());
ASSERT_OK(txn0->Commit());
delete txn0;
// Also test that it works during recovery
txn0 = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn0->SetName("xid2"));
txn0->Put(Slice("foo0"), Slice("bar0a"));
ASSERT_OK(txn0->Prepare());
delete txn0;
reinterpret_cast<PessimisticTransactionDB*>(db)->TEST_Crash();
ASSERT_OK(ReOpenNoDelete());
assert(db != nullptr);
txn0 = db->GetTransactionByName("xid2");
ASSERT_OK(txn0->Commit());
delete txn0;
}
TEST_P(TransactionTest, SuccessTest) {
ASSERT_OK(db->ResetStats());
WriteOptions write_options;
ReadOptions read_options;
std::string value;
ASSERT_OK(db->Put(write_options, Slice("foo"), Slice("bar")));
ASSERT_OK(db->Put(write_options, Slice("foo2"), Slice("bar")));
Transaction* txn = db->BeginTransaction(write_options, TransactionOptions());
ASSERT_TRUE(txn);
ASSERT_EQ(0, txn->GetNumPuts());
ASSERT_LE(0, txn->GetID());
ASSERT_OK(txn->GetForUpdate(read_options, "foo", &value));
ASSERT_EQ(value, "bar");
ASSERT_OK(txn->Put(Slice("foo"), Slice("bar2")));
ASSERT_EQ(1, txn->GetNumPuts());
ASSERT_OK(txn->GetForUpdate(read_options, "foo", &value));
ASSERT_EQ(value, "bar2");
ASSERT_OK(txn->Commit());
ASSERT_OK(db->Get(read_options, "foo", &value));
ASSERT_EQ(value, "bar2");
delete txn;
}
// The test clarifies the contract of do_validate and assume_tracked
// in GetForUpdate and Put/Merge/Delete
TEST_P(TransactionTest, AssumeExclusiveTracked) {
WriteOptions write_options;
ReadOptions read_options;
std::string value;
Status s;
TransactionOptions txn_options;
txn_options.lock_timeout = 1;
const bool EXCLUSIVE = true;
const bool DO_VALIDATE = true;
const bool ASSUME_LOCKED = true;
Transaction* txn = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn);
txn->SetSnapshot();
// commit a value after the snapshot is taken
ASSERT_OK(db->Put(write_options, Slice("foo"), Slice("bar")));
// By default write should fail to the commit after our snapshot
s = txn->GetForUpdate(read_options, "foo", &value, EXCLUSIVE);
ASSERT_TRUE(s.IsBusy());
// But the user could direct the db to skip validating the snapshot. The read
// value then should be the most recently committed
ASSERT_OK(
txn->GetForUpdate(read_options, "foo", &value, EXCLUSIVE, !DO_VALIDATE));
ASSERT_EQ(value, "bar");
// Although ValidateSnapshot is skipped the key must have still got locked
s = db->Put(write_options, Slice("foo"), Slice("bar"));
ASSERT_TRUE(s.IsTimedOut());
// By default the write operations should fail due to the commit after the
// snapshot
s = txn->Put(Slice("foo"), Slice("bar1"));
ASSERT_TRUE(s.IsBusy());
s = txn->Put(db->DefaultColumnFamily(), Slice("foo"), Slice("bar1"),
!ASSUME_LOCKED);
ASSERT_TRUE(s.IsBusy());
// But the user could direct the db that it already assumes exclusive lock on
// the key due to the previous GetForUpdate call.
ASSERT_OK(txn->Put(db->DefaultColumnFamily(), Slice("foo"), Slice("bar1"),
ASSUME_LOCKED));
ASSERT_OK(txn->Merge(db->DefaultColumnFamily(), Slice("foo"), Slice("bar2"),
ASSUME_LOCKED));
ASSERT_OK(
txn->Delete(db->DefaultColumnFamily(), Slice("foo"), ASSUME_LOCKED));
ASSERT_OK(txn->SingleDelete(db->DefaultColumnFamily(), Slice("foo"),
ASSUME_LOCKED));
txn->Rollback();
delete txn;
}
// This test clarifies the contract of ValidateSnapshot
TEST_P(TransactionTest, ValidateSnapshotTest) {
for (bool with_flush : {true}) {
for (bool with_2pc : {true}) {
ASSERT_OK(ReOpen());
WriteOptions write_options;
ReadOptions read_options;
std::string value;
assert(db != nullptr);
Transaction* txn1 =
db->BeginTransaction(write_options, TransactionOptions());
ASSERT_TRUE(txn1);
ASSERT_OK(txn1->Put(Slice("foo"), Slice("bar1")));
if (with_2pc) {
ASSERT_OK(txn1->SetName("xid1"));
ASSERT_OK(txn1->Prepare());
}
if (with_flush) {
auto db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
db_impl->TEST_FlushMemTable(true);
// Make sure the flushed memtable is not kept in memory
int max_memtable_in_history =
std::max(options.max_write_buffer_number,
options.max_write_buffer_number_to_maintain) +
1;
for (int i = 0; i < max_memtable_in_history; i++) {
db->Put(write_options, Slice("key"), Slice("value"));
db_impl->TEST_FlushMemTable(true);
}
}
Transaction* txn2 =
db->BeginTransaction(write_options, TransactionOptions());
ASSERT_TRUE(txn2);
txn2->SetSnapshot();
ASSERT_OK(txn1->Commit());
delete txn1;
auto pes_txn2 = dynamic_cast<PessimisticTransaction*>(txn2);
// Test the simple case where the key is not tracked yet
auto trakced_seq = kMaxSequenceNumber;
auto s = pes_txn2->ValidateSnapshot(db->DefaultColumnFamily(), "foo",
&trakced_seq);
ASSERT_TRUE(s.IsBusy());
delete txn2;
}
}
}
TEST_P(TransactionTest, WaitingTxn) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
string value;
Status s;
txn_options.lock_timeout = 1;
s = db->Put(write_options, Slice("foo"), Slice("bar"));
ASSERT_OK(s);
/* create second cf */
ColumnFamilyHandle* cfa;
ColumnFamilyOptions cf_options;
s = db->CreateColumnFamily(cf_options, "CFA", &cfa);
ASSERT_OK(s);
s = db->Put(write_options, cfa, Slice("foo"), Slice("bar"));
ASSERT_OK(s);
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
TransactionID id1 = txn1->GetID();
ASSERT_TRUE(txn1);
ASSERT_TRUE(txn2);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"TransactionLockMgr::AcquireWithTimeout:WaitingTxn", [&](void* /*arg*/) {
std::string key;
uint32_t cf_id;
std::vector<TransactionID> wait = txn2->GetWaitingTxns(&cf_id, &key);
ASSERT_EQ(key, "foo");
ASSERT_EQ(wait.size(), 1);
ASSERT_EQ(wait[0], id1);
ASSERT_EQ(cf_id, 0);
});
get_perf_context()->Reset();
// lock key in default cf
s = txn1->GetForUpdate(read_options, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar");
ASSERT_EQ(get_perf_context()->key_lock_wait_count, 0);
// lock key in cfa
s = txn1->GetForUpdate(read_options, cfa, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar");
ASSERT_EQ(get_perf_context()->key_lock_wait_count, 0);
auto lock_data = db->GetLockStatusData();
// Locked keys exist in both column family.
ASSERT_EQ(lock_data.size(), 2);
auto cf_iterator = lock_data.begin();
// The iterator points to an unordered_multimap
// thus the test can not assume any particular order.
// Column family is 1 or 0 (cfa).
if (cf_iterator->first != 1 && cf_iterator->first != 0) {
FAIL();
}
// The locked key is "foo" and is locked by txn1
ASSERT_EQ(cf_iterator->second.key, "foo");
ASSERT_EQ(cf_iterator->second.ids.size(), 1);
ASSERT_EQ(cf_iterator->second.ids[0], txn1->GetID());
cf_iterator++;
// Column family is 0 (default) or 1.
if (cf_iterator->first != 1 && cf_iterator->first != 0) {
FAIL();
}
// The locked key is "foo" and is locked by txn1
ASSERT_EQ(cf_iterator->second.key, "foo");
ASSERT_EQ(cf_iterator->second.ids.size(), 1);
ASSERT_EQ(cf_iterator->second.ids[0], txn1->GetID());
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
s = txn2->GetForUpdate(read_options, "foo", &value);
ASSERT_TRUE(s.IsTimedOut());
ASSERT_EQ(s.ToString(), "Operation timed out: Timeout waiting to lock key");
ASSERT_EQ(get_perf_context()->key_lock_wait_count, 1);
ASSERT_GE(get_perf_context()->key_lock_wait_time, 0);
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
delete cfa;
delete txn1;
delete txn2;
}
TEST_P(TransactionTest, SharedLocks) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
Status s;
txn_options.lock_timeout = 1;
s = db->Put(write_options, Slice("foo"), Slice("bar"));
ASSERT_OK(s);
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
Transaction* txn3 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn1);
ASSERT_TRUE(txn2);
ASSERT_TRUE(txn3);
// Test shared access between txns
s = txn1->GetForUpdate(read_options, "foo", nullptr, false /* exclusive */);
ASSERT_OK(s);
s = txn2->GetForUpdate(read_options, "foo", nullptr, false /* exclusive */);
ASSERT_OK(s);
s = txn3->GetForUpdate(read_options, "foo", nullptr, false /* exclusive */);
ASSERT_OK(s);
auto lock_data = db->GetLockStatusData();
ASSERT_EQ(lock_data.size(), 1);
auto cf_iterator = lock_data.begin();
ASSERT_EQ(cf_iterator->second.key, "foo");
// We compare whether the set of txns locking this key is the same. To do
// this, we need to sort both vectors so that the comparison is done
// correctly.
std::vector<TransactionID> expected_txns = {txn1->GetID(), txn2->GetID(),
txn3->GetID()};
std::vector<TransactionID> lock_txns = cf_iterator->second.ids;
ASSERT_EQ(expected_txns, lock_txns);
ASSERT_FALSE(cf_iterator->second.exclusive);
txn1->Rollback();
txn2->Rollback();
txn3->Rollback();
// Test txn1 and txn2 sharing a lock and txn3 trying to obtain it.
s = txn1->GetForUpdate(read_options, "foo", nullptr, false /* exclusive */);
ASSERT_OK(s);
s = txn2->GetForUpdate(read_options, "foo", nullptr, false /* exclusive */);
ASSERT_OK(s);
s = txn3->GetForUpdate(read_options, "foo", nullptr);
ASSERT_TRUE(s.IsTimedOut());
ASSERT_EQ(s.ToString(), "Operation timed out: Timeout waiting to lock key");
txn1->UndoGetForUpdate("foo");
s = txn3->GetForUpdate(read_options, "foo", nullptr);
ASSERT_TRUE(s.IsTimedOut());
ASSERT_EQ(s.ToString(), "Operation timed out: Timeout waiting to lock key");
txn2->UndoGetForUpdate("foo");
s = txn3->GetForUpdate(read_options, "foo", nullptr);
ASSERT_OK(s);
txn1->Rollback();
txn2->Rollback();
txn3->Rollback();
// Test txn1 and txn2 sharing a lock and txn2 trying to upgrade lock.
s = txn1->GetForUpdate(read_options, "foo", nullptr, false /* exclusive */);
ASSERT_OK(s);
s = txn2->GetForUpdate(read_options, "foo", nullptr, false /* exclusive */);
ASSERT_OK(s);
s = txn2->GetForUpdate(read_options, "foo", nullptr);
ASSERT_TRUE(s.IsTimedOut());
ASSERT_EQ(s.ToString(), "Operation timed out: Timeout waiting to lock key");
txn1->UndoGetForUpdate("foo");
s = txn2->GetForUpdate(read_options, "foo", nullptr);
ASSERT_OK(s);
ASSERT_OK(txn1->Rollback());
ASSERT_OK(txn2->Rollback());
// Test txn1 trying to downgrade its lock.
s = txn1->GetForUpdate(read_options, "foo", nullptr, true /* exclusive */);
ASSERT_OK(s);
s = txn2->GetForUpdate(read_options, "foo", nullptr, false /* exclusive */);
ASSERT_TRUE(s.IsTimedOut());
ASSERT_EQ(s.ToString(), "Operation timed out: Timeout waiting to lock key");
// Should still fail after "downgrading".
s = txn1->GetForUpdate(read_options, "foo", nullptr, false /* exclusive */);
ASSERT_OK(s);
s = txn2->GetForUpdate(read_options, "foo", nullptr, false /* exclusive */);
ASSERT_TRUE(s.IsTimedOut());
ASSERT_EQ(s.ToString(), "Operation timed out: Timeout waiting to lock key");
txn1->Rollback();
txn2->Rollback();
// Test txn1 holding an exclusive lock and txn2 trying to obtain shared
// access.
s = txn1->GetForUpdate(read_options, "foo", nullptr);
ASSERT_OK(s);
s = txn2->GetForUpdate(read_options, "foo", nullptr, false /* exclusive */);
ASSERT_TRUE(s.IsTimedOut());
ASSERT_EQ(s.ToString(), "Operation timed out: Timeout waiting to lock key");
txn1->UndoGetForUpdate("foo");
s = txn2->GetForUpdate(read_options, "foo", nullptr, false /* exclusive */);
ASSERT_OK(s);
delete txn1;
delete txn2;
delete txn3;
}
TEST_P(TransactionTest, DeadlockCycleShared) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
txn_options.lock_timeout = 1000000;
txn_options.deadlock_detect = true;
// Set up a wait for chain like this:
//
// Tn -> T(n*2)
// Tn -> T(n*2 + 1)
//
// So we have:
// T1 -> T2 -> T4 ...
// | |> T5 ...
// |> T3 -> T6 ...
// |> T7 ...
// up to T31, then T[16 - 31] -> T1.
// Note that Tn holds lock on floor(n / 2).
std::vector<Transaction*> txns(31);
for (uint32_t i = 0; i < 31; i++) {
txns[i] = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txns[i]);
auto s = txns[i]->GetForUpdate(read_options, ToString((i + 1) / 2), nullptr,
false /* exclusive */);
ASSERT_OK(s);
}
std::atomic<uint32_t> checkpoints(0);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"TransactionLockMgr::AcquireWithTimeout:WaitingTxn",
[&](void* /*arg*/) { checkpoints.fetch_add(1); });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
// We want the leaf transactions to block and hold everyone back.
std::vector<port::Thread> threads;
for (uint32_t i = 0; i < 15; i++) {
std::function<void()> blocking_thread = [&, i] {
auto s = txns[i]->GetForUpdate(read_options, ToString(i + 1), nullptr,
true /* exclusive */);
ASSERT_OK(s);
txns[i]->Rollback();
delete txns[i];
};
threads.emplace_back(blocking_thread);
}
// Wait until all threads are waiting on each other.
while (checkpoints.load() != 15) {
/* sleep override */
std::this_thread::sleep_for(std::chrono::milliseconds(100));
}
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
// Complete the cycle T[16 - 31] -> T1
for (uint32_t i = 15; i < 31; i++) {
auto s =
txns[i]->GetForUpdate(read_options, "0", nullptr, true /* exclusive */);
ASSERT_TRUE(s.IsDeadlock());
// Calculate next buffer len, plateau at 5 when 5 records are inserted.
const uint32_t curr_dlock_buffer_len_ =
(i - 14 > kInitialMaxDeadlocks) ? kInitialMaxDeadlocks : (i - 14);
auto dlock_buffer = db->GetDeadlockInfoBuffer();
ASSERT_EQ(dlock_buffer.size(), curr_dlock_buffer_len_);
auto dlock_entry = dlock_buffer[0].path;
ASSERT_EQ(dlock_entry.size(), kInitialMaxDeadlocks);
int64_t pre_deadlock_time = dlock_buffer[0].deadlock_time;
int64_t cur_deadlock_time = 0;
for (auto const& dl_path_rec : dlock_buffer) {
cur_deadlock_time = dl_path_rec.deadlock_time;
ASSERT_NE(cur_deadlock_time, 0);
ASSERT_TRUE(cur_deadlock_time <= pre_deadlock_time);
pre_deadlock_time = cur_deadlock_time;
}
int64_t curr_waiting_key = 0;
// Offset of each txn id from the root of the shared dlock tree's txn id.
int64_t offset_root = dlock_entry[0].m_txn_id - 1;
// Offset of the final entry in the dlock path from the root's txn id.
TransactionID leaf_id =
dlock_entry[dlock_entry.size() - 1].m_txn_id - offset_root;
for (auto it = dlock_entry.rbegin(); it != dlock_entry.rend(); ++it) {
auto dl_node = *it;
ASSERT_EQ(dl_node.m_txn_id, offset_root + leaf_id);
ASSERT_EQ(dl_node.m_cf_id, 0);
ASSERT_EQ(dl_node.m_waiting_key, ToString(curr_waiting_key));
ASSERT_EQ(dl_node.m_exclusive, true);
if (curr_waiting_key == 0) {
curr_waiting_key = leaf_id;
}
curr_waiting_key /= 2;
leaf_id /= 2;
}
}
// Rollback the leaf transaction.
for (uint32_t i = 15; i < 31; i++) {
txns[i]->Rollback();
delete txns[i];
}
for (auto& t : threads) {
t.join();
}
// Downsize the buffer and verify the 3 latest deadlocks are preserved.
auto dlock_buffer_before_resize = db->GetDeadlockInfoBuffer();
db->SetDeadlockInfoBufferSize(3);
auto dlock_buffer_after_resize = db->GetDeadlockInfoBuffer();
ASSERT_EQ(dlock_buffer_after_resize.size(), 3);
for (uint32_t i = 0; i < dlock_buffer_after_resize.size(); i++) {
for (uint32_t j = 0; j < dlock_buffer_after_resize[i].path.size(); j++) {
ASSERT_EQ(dlock_buffer_after_resize[i].path[j].m_txn_id,
dlock_buffer_before_resize[i].path[j].m_txn_id);
}
}
// Upsize the buffer and verify the 3 latest dealocks are preserved.
dlock_buffer_before_resize = db->GetDeadlockInfoBuffer();
db->SetDeadlockInfoBufferSize(5);
dlock_buffer_after_resize = db->GetDeadlockInfoBuffer();
ASSERT_EQ(dlock_buffer_after_resize.size(), 3);
for (uint32_t i = 0; i < dlock_buffer_before_resize.size(); i++) {
for (uint32_t j = 0; j < dlock_buffer_before_resize[i].path.size(); j++) {
ASSERT_EQ(dlock_buffer_after_resize[i].path[j].m_txn_id,
dlock_buffer_before_resize[i].path[j].m_txn_id);
}
}
// Downsize to 0 and verify the size is consistent.
dlock_buffer_before_resize = db->GetDeadlockInfoBuffer();
db->SetDeadlockInfoBufferSize(0);
dlock_buffer_after_resize = db->GetDeadlockInfoBuffer();
ASSERT_EQ(dlock_buffer_after_resize.size(), 0);
// Upsize from 0 to verify the size is persistent.
dlock_buffer_before_resize = db->GetDeadlockInfoBuffer();
db->SetDeadlockInfoBufferSize(3);
dlock_buffer_after_resize = db->GetDeadlockInfoBuffer();
ASSERT_EQ(dlock_buffer_after_resize.size(), 0);
// Contrived case of shared lock of cycle size 2 to verify that a shared
// lock causing a deadlock is correctly reported as "shared" in the buffer.
std::vector<Transaction*> txns_shared(2);
// Create a cycle of size 2.
for (uint32_t i = 0; i < 2; i++) {
txns_shared[i] = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txns_shared[i]);
auto s = txns_shared[i]->GetForUpdate(read_options, ToString(i), nullptr);
ASSERT_OK(s);
}
std::atomic<uint32_t> checkpoints_shared(0);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"TransactionLockMgr::AcquireWithTimeout:WaitingTxn",
[&](void* /*arg*/) { checkpoints_shared.fetch_add(1); });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
std::vector<port::Thread> threads_shared;
for (uint32_t i = 0; i < 1; i++) {
std::function<void()> blocking_thread = [&, i] {
auto s =
txns_shared[i]->GetForUpdate(read_options, ToString(i + 1), nullptr);
ASSERT_OK(s);
txns_shared[i]->Rollback();
delete txns_shared[i];
};
threads_shared.emplace_back(blocking_thread);
}
// Wait until all threads are waiting on each other.
while (checkpoints_shared.load() != 1) {
/* sleep override */
std::this_thread::sleep_for(std::chrono::milliseconds(100));
}
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
// Complete the cycle T2 -> T1 with a shared lock.
auto s = txns_shared[1]->GetForUpdate(read_options, "0", nullptr, false);
ASSERT_TRUE(s.IsDeadlock());
auto dlock_buffer = db->GetDeadlockInfoBuffer();
// Verify the size of the buffer and the single path.
ASSERT_EQ(dlock_buffer.size(), 1);
ASSERT_EQ(dlock_buffer[0].path.size(), 2);
// Verify the exclusivity field of the transactions in the deadlock path.
ASSERT_TRUE(dlock_buffer[0].path[0].m_exclusive);
ASSERT_FALSE(dlock_buffer[0].path[1].m_exclusive);
txns_shared[1]->Rollback();
delete txns_shared[1];
for (auto& t : threads_shared) {
t.join();
}
}
#ifndef ROCKSDB_VALGRIND_RUN
TEST_P(TransactionStressTest, DeadlockCycle) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
// offset by 2 from the max depth to test edge case
const uint32_t kMaxCycleLength = 52;
txn_options.lock_timeout = 1000000;
txn_options.deadlock_detect = true;
for (uint32_t len = 2; len < kMaxCycleLength; len++) {
// Set up a long wait for chain like this:
//
// T1 -> T2 -> T3 -> ... -> Tlen
std::vector<Transaction*> txns(len);
for (uint32_t i = 0; i < len; i++) {
txns[i] = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txns[i]);
auto s = txns[i]->GetForUpdate(read_options, ToString(i), nullptr);
ASSERT_OK(s);
}
std::atomic<uint32_t> checkpoints(0);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"TransactionLockMgr::AcquireWithTimeout:WaitingTxn",
[&](void* /*arg*/) { checkpoints.fetch_add(1); });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
// We want the last transaction in the chain to block and hold everyone
// back.
std::vector<port::Thread> threads;
for (uint32_t i = 0; i < len - 1; i++) {
std::function<void()> blocking_thread = [&, i] {
auto s = txns[i]->GetForUpdate(read_options, ToString(i + 1), nullptr);
ASSERT_OK(s);
txns[i]->Rollback();
delete txns[i];
};
threads.emplace_back(blocking_thread);
}
// Wait until all threads are waiting on each other.
while (checkpoints.load() != len - 1) {
/* sleep override */
std::this_thread::sleep_for(std::chrono::milliseconds(100));
}
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
// Complete the cycle Tlen -> T1
auto s = txns[len - 1]->GetForUpdate(read_options, "0", nullptr);
ASSERT_TRUE(s.IsDeadlock());
const uint32_t dlock_buffer_size_ = (len - 1 > 5) ? 5 : (len - 1);
uint32_t curr_waiting_key = 0;
TransactionID curr_txn_id = txns[0]->GetID();
auto dlock_buffer = db->GetDeadlockInfoBuffer();
ASSERT_EQ(dlock_buffer.size(), dlock_buffer_size_);
uint32_t check_len = len;
bool check_limit_flag = false;
// Special case for a deadlock path that exceeds the maximum depth.
if (len > 50) {
check_len = 0;
check_limit_flag = true;
}
auto dlock_entry = dlock_buffer[0].path;
ASSERT_EQ(dlock_entry.size(), check_len);
ASSERT_EQ(dlock_buffer[0].limit_exceeded, check_limit_flag);
int64_t pre_deadlock_time = dlock_buffer[0].deadlock_time;
int64_t cur_deadlock_time = 0;
for (auto const& dl_path_rec : dlock_buffer) {
cur_deadlock_time = dl_path_rec.deadlock_time;
ASSERT_NE(cur_deadlock_time, 0);
ASSERT_TRUE(cur_deadlock_time <= pre_deadlock_time);
pre_deadlock_time = cur_deadlock_time;
}
// Iterates backwards over path verifying decreasing txn_ids.
for (auto it = dlock_entry.rbegin(); it != dlock_entry.rend(); ++it) {
auto dl_node = *it;
ASSERT_EQ(dl_node.m_txn_id, len + curr_txn_id - 1);
ASSERT_EQ(dl_node.m_cf_id, 0);
ASSERT_EQ(dl_node.m_waiting_key, ToString(curr_waiting_key));
ASSERT_EQ(dl_node.m_exclusive, true);
curr_txn_id--;
if (curr_waiting_key == 0) {
curr_waiting_key = len;
}
curr_waiting_key--;
}
// Rollback the last transaction.
txns[len - 1]->Rollback();
delete txns[len - 1];
for (auto& t : threads) {
t.join();
}
}
}
TEST_P(TransactionStressTest, DeadlockStress) {
const uint32_t NUM_TXN_THREADS = 10;
const uint32_t NUM_KEYS = 100;
const uint32_t NUM_ITERS = 10000;
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
txn_options.lock_timeout = 1000000;
txn_options.deadlock_detect = true;
std::vector<std::string> keys;
for (uint32_t i = 0; i < NUM_KEYS; i++) {
db->Put(write_options, Slice(ToString(i)), Slice(""));
keys.push_back(ToString(i));
}
size_t tid = std::hash<std::thread::id>()(std::this_thread::get_id());
Random rnd(static_cast<uint32_t>(tid));
std::function<void(uint32_t)> stress_thread = [&](uint32_t seed) {
std::default_random_engine g(seed);
Transaction* txn;
for (uint32_t i = 0; i < NUM_ITERS; i++) {
txn = db->BeginTransaction(write_options, txn_options);
auto random_keys = keys;
std::shuffle(random_keys.begin(), random_keys.end(), g);
// Lock keys in random order.
for (const auto& k : random_keys) {
// Lock mostly for shared access, but exclusive 1/4 of the time.
auto s =
txn->GetForUpdate(read_options, k, nullptr, txn->GetID() % 4 == 0);
if (!s.ok()) {
ASSERT_TRUE(s.IsDeadlock());
txn->Rollback();
break;
}
}
delete txn;
}
};
std::vector<port::Thread> threads;
for (uint32_t i = 0; i < NUM_TXN_THREADS; i++) {
threads.emplace_back(stress_thread, rnd.Next());
}
for (auto& t : threads) {
t.join();
}
}
#endif // ROCKSDB_VALGRIND_RUN
TEST_P(TransactionTest, CommitTimeBatchFailTest) {
WriteOptions write_options;
TransactionOptions txn_options;
std::string value;
Status s;
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn1);
ASSERT_OK(txn1->GetCommitTimeWriteBatch()->Put("cat", "dog"));
s = txn1->Put("foo", "bar");
ASSERT_OK(s);
// fails due to non-empty commit-time batch
s = txn1->Commit();
ASSERT_EQ(s, Status::InvalidArgument());
delete txn1;
}
TEST_P(TransactionTest, LogMarkLeakTest) {
TransactionOptions txn_options;
WriteOptions write_options;
options.write_buffer_size = 1024;
ASSERT_OK(ReOpenNoDelete());
assert(db != nullptr);
Random rnd(47);
std::vector<Transaction*> txns;
DBImpl* db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
// At the beginning there should be no log containing prepare data
ASSERT_EQ(db_impl->TEST_FindMinLogContainingOutstandingPrep(), 0);
for (size_t i = 0; i < 100; i++) {
Transaction* txn = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn->SetName("xid" + ToString(i)));
ASSERT_OK(txn->Put(Slice("foo" + ToString(i)), Slice("bar")));
ASSERT_OK(txn->Prepare());
ASSERT_GT(db_impl->TEST_FindMinLogContainingOutstandingPrep(), 0);
if (rnd.OneIn(5)) {
txns.push_back(txn);
} else {
ASSERT_OK(txn->Commit());
delete txn;
}
db_impl->TEST_FlushMemTable(true);
}
for (auto txn : txns) {
ASSERT_OK(txn->Commit());
delete txn;
}
// At the end there should be no log left containing prepare data
ASSERT_EQ(db_impl->TEST_FindMinLogContainingOutstandingPrep(), 0);
// Make sure that the underlying data structures are properly truncated and
// cause not leak
ASSERT_EQ(db_impl->TEST_PreparedSectionCompletedSize(), 0);
ASSERT_EQ(db_impl->TEST_LogsWithPrepSize(), 0);
}
TEST_P(TransactionTest, SimpleTwoPhaseTransactionTest) {
for (bool cwb4recovery : {true, false}) {
ASSERT_OK(ReOpen());
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
txn_options.use_only_the_last_commit_time_batch_for_recovery = cwb4recovery;
string value;
Status s;
DBImpl* db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
Transaction* txn = db->BeginTransaction(write_options, txn_options);
s = txn->SetName("xid");
ASSERT_OK(s);
ASSERT_EQ(db->GetTransactionByName("xid"), txn);
// transaction put
s = txn->Put(Slice("foo"), Slice("bar"));
ASSERT_OK(s);
ASSERT_EQ(1, txn->GetNumPuts());
// regular db put
s = db->Put(write_options, Slice("foo2"), Slice("bar2"));
ASSERT_OK(s);
ASSERT_EQ(1, txn->GetNumPuts());
// regular db read
db->Get(read_options, "foo2", &value);
ASSERT_EQ(value, "bar2");
// commit time put
txn->GetCommitTimeWriteBatch()->Put(Slice("gtid"), Slice("dogs"));
txn->GetCommitTimeWriteBatch()->Put(Slice("gtid2"), Slice("cats"));
// nothing has been prepped yet
ASSERT_EQ(db_impl->TEST_FindMinLogContainingOutstandingPrep(), 0);
s = txn->Prepare();
ASSERT_OK(s);
// data not im mem yet
s = db->Get(read_options, Slice("foo"), &value);
ASSERT_TRUE(s.IsNotFound());
s = db->Get(read_options, Slice("gtid"), &value);
ASSERT_TRUE(s.IsNotFound());
// find trans in list of prepared transactions
std::vector<Transaction*> prepared_trans;
db->GetAllPreparedTransactions(&prepared_trans);
ASSERT_EQ(prepared_trans.size(), 1);
ASSERT_EQ(prepared_trans.front()->GetName(), "xid");
auto log_containing_prep =
db_impl->TEST_FindMinLogContainingOutstandingPrep();
ASSERT_GT(log_containing_prep, 0);
// make commit
s = txn->Commit();
ASSERT_OK(s);
// value is now available
s = db->Get(read_options, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar");
if (!cwb4recovery) {
s = db->Get(read_options, "gtid", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "dogs");
s = db->Get(read_options, "gtid2", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "cats");
}
// we already committed
s = txn->Commit();
ASSERT_EQ(s, Status::InvalidArgument());
// no longer is prepared results
db->GetAllPreparedTransactions(&prepared_trans);
ASSERT_EQ(prepared_trans.size(), 0);
ASSERT_EQ(db->GetTransactionByName("xid"), nullptr);
// heap should not care about prepared section anymore
ASSERT_EQ(db_impl->TEST_FindMinLogContainingOutstandingPrep(), 0);
switch (txn_db_options.write_policy) {
case WRITE_COMMITTED:
// but now our memtable should be referencing the prep section
ASSERT_GE(log_containing_prep, db_impl->MinLogNumberToKeep());
ASSERT_EQ(log_containing_prep,
db_impl->TEST_FindMinPrepLogReferencedByMemTable());
break;
case WRITE_PREPARED:
case WRITE_UNPREPARED:
// In these modes memtable do not ref the prep sections
ASSERT_EQ(0, db_impl->TEST_FindMinPrepLogReferencedByMemTable());
break;
default:
assert(false);
}
db_impl->TEST_FlushMemTable(true);
// After flush the recoverable state must be visible
if (cwb4recovery) {
s = db->Get(read_options, "gtid", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "dogs");
s = db->Get(read_options, "gtid2", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "cats");
}
// after memtable flush we can now relese the log
ASSERT_GT(db_impl->MinLogNumberToKeep(), log_containing_prep);
ASSERT_EQ(0, db_impl->TEST_FindMinPrepLogReferencedByMemTable());
delete txn;
if (cwb4recovery) {
// kill and reopen to trigger recovery
s = ReOpenNoDelete();
ASSERT_OK(s);
assert(db != nullptr);
s = db->Get(read_options, "gtid", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "dogs");
s = db->Get(read_options, "gtid2", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "cats");
}
}
}
TEST_P(TransactionTest, TwoPhaseNameTest) {
Status s;
WriteOptions write_options;
TransactionOptions txn_options;
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
Transaction* txn3 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn3);
delete txn3;
// cant prepare txn without name
s = txn1->Prepare();
ASSERT_EQ(s, Status::InvalidArgument());
// name too short
s = txn1->SetName("");
ASSERT_EQ(s, Status::InvalidArgument());
// name too long
s = txn1->SetName(std::string(513, 'x'));
ASSERT_EQ(s, Status::InvalidArgument());
// valid set name
s = txn1->SetName("name1");
ASSERT_OK(s);
// cant have duplicate name
s = txn2->SetName("name1");
ASSERT_EQ(s, Status::InvalidArgument());
// shouldn't be able to prepare
s = txn2->Prepare();
ASSERT_EQ(s, Status::InvalidArgument());
// valid name set
s = txn2->SetName("name2");
ASSERT_OK(s);
// cant reset name
s = txn2->SetName("name3");
ASSERT_EQ(s, Status::InvalidArgument());
ASSERT_EQ(txn1->GetName(), "name1");
ASSERT_EQ(txn2->GetName(), "name2");
s = txn1->Prepare();
ASSERT_OK(s);
// can't rename after prepare
s = txn1->SetName("name4");
ASSERT_EQ(s, Status::InvalidArgument());
txn1->Rollback();
txn2->Rollback();
delete txn1;
delete txn2;
}
TEST_P(TransactionTest, TwoPhaseEmptyWriteTest) {
for (bool cwb4recovery : {true, false}) {
for (bool test_with_empty_wal : {true, false}) {
if (!cwb4recovery && test_with_empty_wal) {
continue;
}
ASSERT_OK(ReOpen());
Status s;
std::string value;
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
txn_options.use_only_the_last_commit_time_batch_for_recovery =
cwb4recovery;
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn1);
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn2);
s = txn1->SetName("joe");
ASSERT_OK(s);
s = txn2->SetName("bob");
ASSERT_OK(s);
s = txn1->Prepare();
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
delete txn1;
txn2->GetCommitTimeWriteBatch()->Put(Slice("foo"), Slice("bar"));
s = txn2->Prepare();
ASSERT_OK(s);
s = txn2->Commit();
ASSERT_OK(s);
delete txn2;
if (!cwb4recovery) {
s = db->Get(read_options, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar");
} else {
if (test_with_empty_wal) {
DBImpl* db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
db_impl->TEST_FlushMemTable(true);
// After flush the state must be visible
s = db->Get(read_options, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar");
}
db->FlushWAL(true);
// kill and reopen to trigger recovery
s = ReOpenNoDelete();
ASSERT_OK(s);
assert(db != nullptr);
s = db->Get(read_options, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar");
}
}
}
}
#ifndef ROCKSDB_VALGRIND_RUN
TEST_P(TransactionStressTest, TwoPhaseExpirationTest) {
Status s;
WriteOptions write_options;
TransactionOptions txn_options;
txn_options.expiration = 500; // 500ms
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn1);
ASSERT_TRUE(txn1);
s = txn1->SetName("joe");
ASSERT_OK(s);
s = txn2->SetName("bob");
ASSERT_OK(s);
s = txn1->Prepare();
ASSERT_OK(s);
/* sleep override */
std::this_thread::sleep_for(std::chrono::milliseconds(1000));
s = txn1->Commit();
ASSERT_OK(s);
s = txn2->Prepare();
ASSERT_EQ(s, Status::Expired());
delete txn1;
delete txn2;
}
TEST_P(TransactionTest, TwoPhaseRollbackTest) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
std::string value;
Status s;
DBImpl* db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
Transaction* txn = db->BeginTransaction(write_options, txn_options);
s = txn->SetName("xid");
ASSERT_OK(s);
// transaction put
s = txn->Put(Slice("tfoo"), Slice("tbar"));
ASSERT_OK(s);
// value is readable form txn
s = txn->Get(read_options, Slice("tfoo"), &value);
ASSERT_OK(s);
ASSERT_EQ(value, "tbar");
// issue rollback
s = txn->Rollback();
ASSERT_OK(s);
// value is nolonger readable
s = txn->Get(read_options, Slice("tfoo"), &value);
ASSERT_TRUE(s.IsNotFound());
ASSERT_EQ(txn->GetNumPuts(), 0);
// put new txn values
s = txn->Put(Slice("tfoo2"), Slice("tbar2"));
ASSERT_OK(s);
// new value is readable from txn
s = txn->Get(read_options, Slice("tfoo2"), &value);
ASSERT_OK(s);
ASSERT_EQ(value, "tbar2");
s = txn->Prepare();
ASSERT_OK(s);
// flush to next wal
s = db->Put(write_options, Slice("foo"), Slice("bar"));
ASSERT_OK(s);
db_impl->TEST_FlushMemTable(true);
// issue rollback (marker written to WAL)
s = txn->Rollback();
ASSERT_OK(s);
// value is nolonger readable
s = txn->Get(read_options, Slice("tfoo2"), &value);
ASSERT_TRUE(s.IsNotFound());
ASSERT_EQ(txn->GetNumPuts(), 0);
// make commit
s = txn->Commit();
ASSERT_EQ(s, Status::InvalidArgument());
// try rollback again
s = txn->Rollback();
ASSERT_EQ(s, Status::InvalidArgument());
delete txn;
}
TEST_P(TransactionTest, PersistentTwoPhaseTransactionTest) {
WriteOptions write_options;
write_options.sync = true;
write_options.disableWAL = false;
ReadOptions read_options;
TransactionOptions txn_options;
std::string value;
Status s;
DBImpl* db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
Transaction* txn = db->BeginTransaction(write_options, txn_options);
s = txn->SetName("xid");
ASSERT_OK(s);
ASSERT_EQ(db->GetTransactionByName("xid"), txn);
// transaction put
s = txn->Put(Slice("foo"), Slice("bar"));
ASSERT_OK(s);
ASSERT_EQ(1, txn->GetNumPuts());
// txn read
s = txn->Get(read_options, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar");
// regular db put
s = db->Put(write_options, Slice("foo2"), Slice("bar2"));
ASSERT_OK(s);
ASSERT_EQ(1, txn->GetNumPuts());
db_impl->TEST_FlushMemTable(true);
// regular db read
db->Get(read_options, "foo2", &value);
ASSERT_EQ(value, "bar2");
// nothing has been prepped yet
ASSERT_EQ(db_impl->TEST_FindMinLogContainingOutstandingPrep(), 0);
// prepare
s = txn->Prepare();
ASSERT_OK(s);
// still not available to db
s = db->Get(read_options, Slice("foo"), &value);
ASSERT_TRUE(s.IsNotFound());
db->FlushWAL(false);
delete txn;
// kill and reopen
reinterpret_cast<PessimisticTransactionDB*>(db)->TEST_Crash();
s = ReOpenNoDelete();
ASSERT_OK(s);
assert(db != nullptr);
db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
// find trans in list of prepared transactions
std::vector<Transaction*> prepared_trans;
db->GetAllPreparedTransactions(&prepared_trans);
ASSERT_EQ(prepared_trans.size(), 1);
txn = prepared_trans.front();
ASSERT_TRUE(txn);
ASSERT_EQ(txn->GetName(), "xid");
ASSERT_EQ(db->GetTransactionByName("xid"), txn);
// log has been marked
auto log_containing_prep =
db_impl->TEST_FindMinLogContainingOutstandingPrep();
ASSERT_GT(log_containing_prep, 0);
// value is readable from txn
s = txn->Get(read_options, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar");
// make commit
s = txn->Commit();
ASSERT_OK(s);
// value is now available
db->Get(read_options, "foo", &value);
ASSERT_EQ(value, "bar");
// we already committed
s = txn->Commit();
ASSERT_EQ(s, Status::InvalidArgument());
// no longer is prepared results
prepared_trans.clear();
db->GetAllPreparedTransactions(&prepared_trans);
ASSERT_EQ(prepared_trans.size(), 0);
// transaction should no longer be visible
ASSERT_EQ(db->GetTransactionByName("xid"), nullptr);
// heap should not care about prepared section anymore
ASSERT_EQ(db_impl->TEST_FindMinLogContainingOutstandingPrep(), 0);
switch (txn_db_options.write_policy) {
case WRITE_COMMITTED:
// but now our memtable should be referencing the prep section
ASSERT_EQ(log_containing_prep,
db_impl->TEST_FindMinPrepLogReferencedByMemTable());
ASSERT_GE(log_containing_prep, db_impl->MinLogNumberToKeep());
break;
case WRITE_PREPARED:
case WRITE_UNPREPARED:
// In these modes memtable do not ref the prep sections
ASSERT_EQ(0, db_impl->TEST_FindMinPrepLogReferencedByMemTable());
break;
default:
assert(false);
}
// Add a dummy record to memtable before a flush. Otherwise, the
// memtable will be empty and flush will be skipped.
s = db->Put(write_options, Slice("foo3"), Slice("bar3"));
ASSERT_OK(s);
db_impl->TEST_FlushMemTable(true);
// after memtable flush we can now release the log
ASSERT_GT(db_impl->MinLogNumberToKeep(), log_containing_prep);
ASSERT_EQ(0, db_impl->TEST_FindMinPrepLogReferencedByMemTable());
delete txn;
// deleting transaction should unregister transaction
ASSERT_EQ(db->GetTransactionByName("xid"), nullptr);
}
#endif // ROCKSDB_VALGRIND_RUN
// TODO this test needs to be updated with serial commits
TEST_P(TransactionTest, DISABLED_TwoPhaseMultiThreadTest) {
// mix transaction writes and regular writes
const uint32_t NUM_TXN_THREADS = 50;
std::atomic<uint32_t> txn_thread_num(0);
std::function<void()> txn_write_thread = [&]() {
uint32_t id = txn_thread_num.fetch_add(1);
WriteOptions write_options;
write_options.sync = true;
write_options.disableWAL = false;
TransactionOptions txn_options;
txn_options.lock_timeout = 1000000;
if (id % 2 == 0) {
txn_options.expiration = 1000000;
}
TransactionName name("xid_" + std::string(1, 'A' + static_cast<char>(id)));
Transaction* txn = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn->SetName(name));
for (int i = 0; i < 10; i++) {
std::string key(name + "_" + std::string(1, static_cast<char>('A' + i)));
ASSERT_OK(txn->Put(key, "val"));
}
ASSERT_OK(txn->Prepare());
ASSERT_OK(txn->Commit());
delete txn;
};
// assure that all thread are in the same write group
std::atomic<uint32_t> t_wait_on_prepare(0);
std::atomic<uint32_t> t_wait_on_commit(0);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"WriteThread::JoinBatchGroup:Wait", [&](void* arg) {
auto* writer = reinterpret_cast<WriteThread::Writer*>(arg);
if (writer->ShouldWriteToWAL()) {
t_wait_on_prepare.fetch_add(1);
// wait for friends
while (t_wait_on_prepare.load() < NUM_TXN_THREADS) {
env->SleepForMicroseconds(10);
}
} else if (writer->ShouldWriteToMemtable()) {
t_wait_on_commit.fetch_add(1);
// wait for friends
while (t_wait_on_commit.load() < NUM_TXN_THREADS) {
env->SleepForMicroseconds(10);
}
} else {
FAIL();
}
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
// do all the writes
std::vector<port::Thread> threads;
for (uint32_t i = 0; i < NUM_TXN_THREADS; i++) {
threads.emplace_back(txn_write_thread);
}
for (auto& t : threads) {
t.join();
}
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
ReadOptions read_options;
std::string value;
Status s;
for (uint32_t t = 0; t < NUM_TXN_THREADS; t++) {
TransactionName name("xid_" + std::string(1, 'A' + static_cast<char>(t)));
for (int i = 0; i < 10; i++) {
std::string key(name + "_" + std::string(1, static_cast<char>('A' + i)));
s = db->Get(read_options, key, &value);
ASSERT_OK(s);
ASSERT_EQ(value, "val");
}
}
}
TEST_P(TransactionStressTest, TwoPhaseLongPrepareTest) {
WriteOptions write_options;
write_options.sync = true;
write_options.disableWAL = false;
ReadOptions read_options;
TransactionOptions txn_options;
std::string value;
Status s;
Transaction* txn = db->BeginTransaction(write_options, txn_options);
s = txn->SetName("bob");
ASSERT_OK(s);
// transaction put
s = txn->Put(Slice("foo"), Slice("bar"));
ASSERT_OK(s);
// prepare
s = txn->Prepare();
ASSERT_OK(s);
delete txn;
for (int i = 0; i < 1000; i++) {
std::string key(i, 'k');
std::string val(1000, 'v');
assert(db != nullptr);
s = db->Put(write_options, key, val);
ASSERT_OK(s);
if (i % 29 == 0) {
// crash
env->SetFilesystemActive(false);
reinterpret_cast<PessimisticTransactionDB*>(db)->TEST_Crash();
ReOpenNoDelete();
} else if (i % 37 == 0) {
// close
ReOpenNoDelete();
}
}
// commit old txn
txn = db->GetTransactionByName("bob");
ASSERT_TRUE(txn);
s = txn->Commit();
ASSERT_OK(s);
// verify data txn data
s = db->Get(read_options, "foo", &value);
ASSERT_EQ(s, Status::OK());
ASSERT_EQ(value, "bar");
// verify non txn data
for (int i = 0; i < 1000; i++) {
std::string key(i, 'k');
std::string val(1000, 'v');
s = db->Get(read_options, key, &value);
ASSERT_EQ(s, Status::OK());
ASSERT_EQ(value, val);
}
delete txn;
}
TEST_P(TransactionTest, TwoPhaseSequenceTest) {
WriteOptions write_options;
write_options.sync = true;
write_options.disableWAL = false;
ReadOptions read_options;
TransactionOptions txn_options;
std::string value;
Status s;
Transaction* txn = db->BeginTransaction(write_options, txn_options);
s = txn->SetName("xid");
ASSERT_OK(s);
// transaction put
s = txn->Put(Slice("foo"), Slice("bar"));
ASSERT_OK(s);
s = txn->Put(Slice("foo2"), Slice("bar2"));
ASSERT_OK(s);
s = txn->Put(Slice("foo3"), Slice("bar3"));
ASSERT_OK(s);
s = txn->Put(Slice("foo4"), Slice("bar4"));
ASSERT_OK(s);
// prepare
s = txn->Prepare();
ASSERT_OK(s);
// make commit
s = txn->Commit();
ASSERT_OK(s);
delete txn;
// kill and reopen
env->SetFilesystemActive(false);
ReOpenNoDelete();
assert(db != nullptr);
// value is now available
s = db->Get(read_options, "foo4", &value);
ASSERT_EQ(s, Status::OK());
ASSERT_EQ(value, "bar4");
}
TEST_P(TransactionTest, TwoPhaseDoubleRecoveryTest) {
WriteOptions write_options;
write_options.sync = true;
write_options.disableWAL = false;
ReadOptions read_options;
TransactionOptions txn_options;
std::string value;
Status s;
Transaction* txn = db->BeginTransaction(write_options, txn_options);
s = txn->SetName("a");
ASSERT_OK(s);
// transaction put
s = txn->Put(Slice("foo"), Slice("bar"));
ASSERT_OK(s);
// prepare
s = txn->Prepare();
ASSERT_OK(s);
delete txn;
// kill and reopen
env->SetFilesystemActive(false);
reinterpret_cast<PessimisticTransactionDB*>(db)->TEST_Crash();
ReOpenNoDelete();
// commit old txn
txn = db->GetTransactionByName("a");
s = txn->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "foo", &value);
ASSERT_EQ(s, Status::OK());
ASSERT_EQ(value, "bar");
delete txn;
txn = db->BeginTransaction(write_options, txn_options);
s = txn->SetName("b");
ASSERT_OK(s);
s = txn->Put(Slice("foo2"), Slice("bar2"));
ASSERT_OK(s);
s = txn->Prepare();
ASSERT_OK(s);
s = txn->Commit();
ASSERT_OK(s);
delete txn;
// kill and reopen
env->SetFilesystemActive(false);
ReOpenNoDelete();
assert(db != nullptr);
// value is now available
s = db->Get(read_options, "foo", &value);
ASSERT_EQ(s, Status::OK());
ASSERT_EQ(value, "bar");
s = db->Get(read_options, "foo2", &value);
ASSERT_EQ(s, Status::OK());
ASSERT_EQ(value, "bar2");
}
TEST_P(TransactionTest, TwoPhaseLogRollingTest) {
DBImpl* db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
Status s;
std::string v;
ColumnFamilyHandle *cfa, *cfb;
// Create 2 new column families
ColumnFamilyOptions cf_options;
s = db->CreateColumnFamily(cf_options, "CFA", &cfa);
ASSERT_OK(s);
s = db->CreateColumnFamily(cf_options, "CFB", &cfb);
ASSERT_OK(s);
WriteOptions wopts;
wopts.disableWAL = false;
wopts.sync = true;
TransactionOptions topts1;
Transaction* txn1 = db->BeginTransaction(wopts, topts1);
s = txn1->SetName("xid1");
ASSERT_OK(s);
TransactionOptions topts2;
Transaction* txn2 = db->BeginTransaction(wopts, topts2);
s = txn2->SetName("xid2");
ASSERT_OK(s);
// transaction put in two column families
s = txn1->Put(cfa, "ka1", "va1");
ASSERT_OK(s);
// transaction put in two column families
s = txn2->Put(cfa, "ka2", "va2");
ASSERT_OK(s);
s = txn2->Put(cfb, "kb2", "vb2");
ASSERT_OK(s);
// write prep section to wal
s = txn1->Prepare();
ASSERT_OK(s);
// our log should be in the heap
ASSERT_EQ(db_impl->TEST_FindMinLogContainingOutstandingPrep(),
txn1->GetLogNumber());
ASSERT_EQ(db_impl->TEST_LogfileNumber(), txn1->GetLogNumber());
// flush default cf to crate new log
s = db->Put(wopts, "foo", "bar");
ASSERT_OK(s);
s = db_impl->TEST_FlushMemTable(true);
ASSERT_OK(s);
// make sure we are on a new log
ASSERT_GT(db_impl->TEST_LogfileNumber(), txn1->GetLogNumber());
// put txn2 prep section in this log
s = txn2->Prepare();
ASSERT_OK(s);
ASSERT_EQ(db_impl->TEST_LogfileNumber(), txn2->GetLogNumber());
// heap should still see first log
ASSERT_EQ(db_impl->TEST_FindMinLogContainingOutstandingPrep(),
txn1->GetLogNumber());
// commit txn1
s = txn1->Commit();
ASSERT_OK(s);
// heap should now show txn2s log
ASSERT_EQ(db_impl->TEST_FindMinLogContainingOutstandingPrep(),
txn2->GetLogNumber());
switch (txn_db_options.write_policy) {
case WRITE_COMMITTED:
// we should see txn1s log refernced by the memtables
ASSERT_EQ(txn1->GetLogNumber(),
db_impl->TEST_FindMinPrepLogReferencedByMemTable());
break;
case WRITE_PREPARED:
case WRITE_UNPREPARED:
// In these modes memtable do not ref the prep sections
ASSERT_EQ(0, db_impl->TEST_FindMinPrepLogReferencedByMemTable());
break;
default:
assert(false);
}
// flush default cf to crate new log
s = db->Put(wopts, "foo", "bar2");
ASSERT_OK(s);
s = db_impl->TEST_FlushMemTable(true);
ASSERT_OK(s);
// make sure we are on a new log
ASSERT_GT(db_impl->TEST_LogfileNumber(), txn2->GetLogNumber());
// commit txn2
s = txn2->Commit();
ASSERT_OK(s);
// heap should not show any logs
ASSERT_EQ(db_impl->TEST_FindMinLogContainingOutstandingPrep(), 0);
switch (txn_db_options.write_policy) {
case WRITE_COMMITTED:
// should show the first txn log
ASSERT_EQ(txn1->GetLogNumber(),
db_impl->TEST_FindMinPrepLogReferencedByMemTable());
break;
case WRITE_PREPARED:
case WRITE_UNPREPARED:
// In these modes memtable do not ref the prep sections
ASSERT_EQ(0, db_impl->TEST_FindMinPrepLogReferencedByMemTable());
break;
default:
assert(false);
}
// flush only cfa memtable
s = db_impl->TEST_FlushMemTable(true, false, cfa);
ASSERT_OK(s);
switch (txn_db_options.write_policy) {
case WRITE_COMMITTED:
// should show the first txn log
ASSERT_EQ(txn2->GetLogNumber(),
db_impl->TEST_FindMinPrepLogReferencedByMemTable());
break;
case WRITE_PREPARED:
case WRITE_UNPREPARED:
// In these modes memtable do not ref the prep sections
ASSERT_EQ(0, db_impl->TEST_FindMinPrepLogReferencedByMemTable());
break;
default:
assert(false);
}
// flush only cfb memtable
s = db_impl->TEST_FlushMemTable(true, false, cfb);
ASSERT_OK(s);
// should show not dependency on logs
ASSERT_EQ(db_impl->TEST_FindMinPrepLogReferencedByMemTable(), 0);
ASSERT_EQ(db_impl->TEST_FindMinLogContainingOutstandingPrep(), 0);
delete txn1;
delete txn2;
delete cfa;
delete cfb;
}
TEST_P(TransactionTest, TwoPhaseLogRollingTest2) {
DBImpl* db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
Status s;
ColumnFamilyHandle *cfa, *cfb;
ColumnFamilyOptions cf_options;
s = db->CreateColumnFamily(cf_options, "CFA", &cfa);
ASSERT_OK(s);
s = db->CreateColumnFamily(cf_options, "CFB", &cfb);
ASSERT_OK(s);
WriteOptions wopts;
wopts.disableWAL = false;
wopts.sync = true;
auto cfh_a = reinterpret_cast<ColumnFamilyHandleImpl*>(cfa);
auto cfh_b = reinterpret_cast<ColumnFamilyHandleImpl*>(cfb);
TransactionOptions topts1;
Transaction* txn1 = db->BeginTransaction(wopts, topts1);
s = txn1->SetName("xid1");
ASSERT_OK(s);
s = txn1->Put(cfa, "boys", "girls1");
ASSERT_OK(s);
Transaction* txn2 = db->BeginTransaction(wopts, topts1);
s = txn2->SetName("xid2");
ASSERT_OK(s);
s = txn2->Put(cfb, "up", "down1");
ASSERT_OK(s);
// prepre transaction in LOG A
s = txn1->Prepare();
ASSERT_OK(s);
// prepre transaction in LOG A
s = txn2->Prepare();
ASSERT_OK(s);
// regular put so that mem table can actually be flushed for log rolling
s = db->Put(wopts, "cats", "dogs1");
ASSERT_OK(s);
auto prepare_log_no = txn1->GetLogNumber();
// roll to LOG B
s = db_impl->TEST_FlushMemTable(true);
ASSERT_OK(s);
// now we pause background work so that
// imm()s are not flushed before we can check their status
s = db_impl->PauseBackgroundWork();
ASSERT_OK(s);
ASSERT_GT(db_impl->TEST_LogfileNumber(), prepare_log_no);
switch (txn_db_options.write_policy) {
case WRITE_COMMITTED:
// This cf is empty and should ref the latest log
ASSERT_GT(cfh_a->cfd()->GetLogNumber(), prepare_log_no);
ASSERT_EQ(cfh_a->cfd()->GetLogNumber(), db_impl->TEST_LogfileNumber());
break;
case WRITE_PREPARED:
case WRITE_UNPREPARED:
// This cf is not flushed yet and should ref the log that has its data
ASSERT_EQ(cfh_a->cfd()->GetLogNumber(), prepare_log_no);
break;
default:
assert(false);
}
ASSERT_EQ(db_impl->TEST_FindMinLogContainingOutstandingPrep(),
prepare_log_no);
ASSERT_EQ(db_impl->TEST_FindMinPrepLogReferencedByMemTable(), 0);
// commit in LOG B
s = txn1->Commit();
ASSERT_OK(s);
switch (txn_db_options.write_policy) {
case WRITE_COMMITTED:
ASSERT_EQ(db_impl->TEST_FindMinPrepLogReferencedByMemTable(),
prepare_log_no);
break;
case WRITE_PREPARED:
case WRITE_UNPREPARED:
// In these modes memtable do not ref the prep sections
ASSERT_EQ(db_impl->TEST_FindMinPrepLogReferencedByMemTable(), 0);
break;
default:
assert(false);
}
ASSERT_TRUE(!db_impl->TEST_UnableToReleaseOldestLog());
// request a flush for all column families such that the earliest
// alive log file can be killed
db_impl->TEST_SwitchWAL();
// log cannot be flushed because txn2 has not been commited
ASSERT_TRUE(!db_impl->TEST_IsLogGettingFlushed());
ASSERT_TRUE(db_impl->TEST_UnableToReleaseOldestLog());
// assert that cfa has a flush requested
ASSERT_TRUE(cfh_a->cfd()->imm()->HasFlushRequested());
switch (txn_db_options.write_policy) {
case WRITE_COMMITTED:
// cfb should not be flushed becuse it has no data from LOG A
ASSERT_TRUE(!cfh_b->cfd()->imm()->HasFlushRequested());
break;
case WRITE_PREPARED:
case WRITE_UNPREPARED:
// cfb should be flushed becuse it has prepared data from LOG A
ASSERT_TRUE(cfh_b->cfd()->imm()->HasFlushRequested());
break;
default:
assert(false);
}
// cfb now has data from LOG A
s = txn2->Commit();
ASSERT_OK(s);
db_impl->TEST_SwitchWAL();
ASSERT_TRUE(!db_impl->TEST_UnableToReleaseOldestLog());
// we should see that cfb now has a flush requested
ASSERT_TRUE(cfh_b->cfd()->imm()->HasFlushRequested());
// all data in LOG A resides in a memtable that has been
// requested for a flush
ASSERT_TRUE(db_impl->TEST_IsLogGettingFlushed());
delete txn1;
delete txn2;
delete cfa;
delete cfb;
}
/*
* 1) use prepare to keep first log around to determine starting sequence
* during recovery.
* 2) insert many values, skipping wal, to increase seqid.
* 3) insert final value into wal
* 4) recover and see that final value was properly recovered - not
* hidden behind improperly summed sequence ids
*/
TEST_P(TransactionTest, TwoPhaseOutOfOrderDelete) {
DBImpl* db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
WriteOptions wal_on, wal_off;
wal_on.sync = true;
wal_on.disableWAL = false;
wal_off.disableWAL = true;
ReadOptions read_options;
TransactionOptions txn_options;
std::string value;
Status s;
Transaction* txn1 = db->BeginTransaction(wal_on, txn_options);
s = txn1->SetName("1");
ASSERT_OK(s);
s = db->Put(wal_on, "first", "first");
ASSERT_OK(s);
s = txn1->Put(Slice("dummy"), Slice("dummy"));
ASSERT_OK(s);
s = txn1->Prepare();
ASSERT_OK(s);
s = db->Put(wal_off, "cats", "dogs1");
ASSERT_OK(s);
s = db->Put(wal_off, "cats", "dogs2");
ASSERT_OK(s);
s = db->Put(wal_off, "cats", "dogs3");
ASSERT_OK(s);
s = db_impl->TEST_FlushMemTable(true);
ASSERT_OK(s);
s = db->Put(wal_on, "cats", "dogs4");
ASSERT_OK(s);
db->FlushWAL(false);
// kill and reopen
env->SetFilesystemActive(false);
reinterpret_cast<PessimisticTransactionDB*>(db)->TEST_Crash();
ReOpenNoDelete();
assert(db != nullptr);
s = db->Get(read_options, "first", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "first");
s = db->Get(read_options, "cats", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "dogs4");
}
TEST_P(TransactionTest, FirstWriteTest) {
WriteOptions write_options;
// Test conflict checking against the very first write to a db.
// The transaction's snapshot will have seq 1 and the following write
// will have sequence 1.
Status s = db->Put(write_options, "A", "a");
Transaction* txn = db->BeginTransaction(write_options);
txn->SetSnapshot();
ASSERT_OK(s);
s = txn->Put("A", "b");
ASSERT_OK(s);
delete txn;
}
TEST_P(TransactionTest, FirstWriteTest2) {
WriteOptions write_options;
Transaction* txn = db->BeginTransaction(write_options);
txn->SetSnapshot();
// Test conflict checking against the very first write to a db.
// The transaction's snapshot is a seq 0 while the following write
// will have sequence 1.
Status s = db->Put(write_options, "A", "a");
ASSERT_OK(s);
s = txn->Put("A", "b");
ASSERT_TRUE(s.IsBusy());
delete txn;
}
TEST_P(TransactionTest, WriteOptionsTest) {
WriteOptions write_options;
write_options.sync = true;
write_options.disableWAL = true;
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
ASSERT_TRUE(txn->GetWriteOptions()->sync);
write_options.sync = false;
txn->SetWriteOptions(write_options);
ASSERT_FALSE(txn->GetWriteOptions()->sync);
ASSERT_TRUE(txn->GetWriteOptions()->disableWAL);
delete txn;
}
TEST_P(TransactionTest, WriteConflictTest) {
WriteOptions write_options;
ReadOptions read_options;
string value;
Status s;
db->Put(write_options, "foo", "A");
db->Put(write_options, "foo2", "B");
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
s = txn->Put("foo", "A2");
ASSERT_OK(s);
s = txn->Put("foo2", "B2");
ASSERT_OK(s);
// This Put outside of a transaction will conflict with the previous write
s = db->Put(write_options, "foo", "xxx");
ASSERT_TRUE(s.IsTimedOut());
s = db->Get(read_options, "foo", &value);
ASSERT_EQ(value, "A");
s = txn->Commit();
ASSERT_OK(s);
db->Get(read_options, "foo", &value);
ASSERT_EQ(value, "A2");
db->Get(read_options, "foo2", &value);
ASSERT_EQ(value, "B2");
delete txn;
}
TEST_P(TransactionTest, WriteConflictTest2) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
std::string value;
Status s;
db->Put(write_options, "foo", "bar");
txn_options.set_snapshot = true;
Transaction* txn = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn);
// This Put outside of a transaction will conflict with a later write
s = db->Put(write_options, "foo", "barz");
ASSERT_OK(s);
s = txn->Put("foo2", "X");
ASSERT_OK(s);
s = txn->Put("foo",
"bar2"); // Conflicts with write done after snapshot taken
ASSERT_TRUE(s.IsBusy());
s = txn->Put("foo3", "Y");
ASSERT_OK(s);
s = db->Get(read_options, "foo", &value);
ASSERT_EQ(value, "barz");
ASSERT_EQ(2, txn->GetNumKeys());
s = txn->Commit();
ASSERT_OK(s); // Txn should commit, but only write foo2 and foo3
// Verify that transaction wrote foo2 and foo3 but not foo
db->Get(read_options, "foo", &value);
ASSERT_EQ(value, "barz");
db->Get(read_options, "foo2", &value);
ASSERT_EQ(value, "X");
db->Get(read_options, "foo3", &value);
ASSERT_EQ(value, "Y");
delete txn;
}
TEST_P(TransactionTest, ReadConflictTest) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
TransactionOptions txn_options;
std::string value;
Status s;
db->Put(write_options, "foo", "bar");
db->Put(write_options, "foo2", "bar");
txn_options.set_snapshot = true;
Transaction* txn = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn);
txn->SetSnapshot();
snapshot_read_options.snapshot = txn->GetSnapshot();
txn->GetForUpdate(snapshot_read_options, "foo", &value);
ASSERT_EQ(value, "bar");
// This Put outside of a transaction will conflict with the previous read
s = db->Put(write_options, "foo", "barz");
ASSERT_TRUE(s.IsTimedOut());
s = db->Get(read_options, "foo", &value);
ASSERT_EQ(value, "bar");
s = txn->Get(read_options, "foo", &value);
ASSERT_EQ(value, "bar");
s = txn->Commit();
ASSERT_OK(s);
delete txn;
}
TEST_P(TransactionTest, TxnOnlyTest) {
// Test to make sure transactions work when there are no other writes in an
// empty db.
WriteOptions write_options;
ReadOptions read_options;
std::string value;
Status s;
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
s = txn->Put("x", "y");
ASSERT_OK(s);
s = txn->Commit();
ASSERT_OK(s);
delete txn;
}
TEST_P(TransactionTest, FlushTest) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
std::string value;
Status s;
db->Put(write_options, Slice("foo"), Slice("bar"));
db->Put(write_options, Slice("foo2"), Slice("bar"));
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
snapshot_read_options.snapshot = txn->GetSnapshot();
txn->GetForUpdate(snapshot_read_options, "foo", &value);
ASSERT_EQ(value, "bar");
s = txn->Put(Slice("foo"), Slice("bar2"));
ASSERT_OK(s);
txn->GetForUpdate(snapshot_read_options, "foo", &value);
ASSERT_EQ(value, "bar2");
// Put a random key so we have a memtable to flush
s = db->Put(write_options, "dummy", "dummy");
ASSERT_OK(s);
// force a memtable flush
FlushOptions flush_ops;
db->Flush(flush_ops);
s = txn->Commit();
// txn should commit since the flushed table is still in MemtableList History
ASSERT_OK(s);
db->Get(read_options, "foo", &value);
ASSERT_EQ(value, "bar2");
delete txn;
}
TEST_P(TransactionTest, FlushTest2) {
const size_t num_tests = 3;
for (size_t n = 0; n < num_tests; n++) {
// Test different table factories
switch (n) {
case 0:
break;
case 1:
options.table_factory.reset(new mock::MockTableFactory());
break;
case 2: {
PlainTableOptions pt_opts;
pt_opts.hash_table_ratio = 0;
options.table_factory.reset(NewPlainTableFactory(pt_opts));
break;
}
}
Status s = ReOpen();
ASSERT_OK(s);
assert(db != nullptr);
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
TransactionOptions txn_options;
string value;
DBImpl* db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
db->Put(write_options, Slice("foo"), Slice("bar"));
db->Put(write_options, Slice("foo2"), Slice("bar2"));
db->Put(write_options, Slice("foo3"), Slice("bar3"));
txn_options.set_snapshot = true;
Transaction* txn = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn);
snapshot_read_options.snapshot = txn->GetSnapshot();
txn->GetForUpdate(snapshot_read_options, "foo", &value);
ASSERT_EQ(value, "bar");
s = txn->Put(Slice("foo"), Slice("bar2"));
ASSERT_OK(s);
txn->GetForUpdate(snapshot_read_options, "foo", &value);
ASSERT_EQ(value, "bar2");
// verify foo is locked by txn
s = db->Delete(write_options, "foo");
ASSERT_TRUE(s.IsTimedOut());
s = db->Put(write_options, "Z", "z");
ASSERT_OK(s);
s = db->Put(write_options, "dummy", "dummy");
ASSERT_OK(s);
s = db->Put(write_options, "S", "s");
ASSERT_OK(s);
s = db->SingleDelete(write_options, "S");
ASSERT_OK(s);
s = txn->Delete("S");
// Should fail after encountering a write to S in memtable
ASSERT_TRUE(s.IsBusy());
// force a memtable flush
s = db_impl->TEST_FlushMemTable(true);
ASSERT_OK(s);
// Put a random key so we have a MemTable to flush
s = db->Put(write_options, "dummy", "dummy2");
ASSERT_OK(s);
// force a memtable flush
ASSERT_OK(db_impl->TEST_FlushMemTable(true));
s = db->Put(write_options, "dummy", "dummy3");
ASSERT_OK(s);
// force a memtable flush
// Since our test db has max_write_buffer_number=2, this flush will cause
// the first memtable to get purged from the MemtableList history.
ASSERT_OK(db_impl->TEST_FlushMemTable(true));
s = txn->Put("X", "Y");
// Should succeed after verifying there is no write to X in SST file
ASSERT_OK(s);
s = txn->Put("Z", "zz");
// Should fail after encountering a write to Z in SST file
ASSERT_TRUE(s.IsBusy());
s = txn->GetForUpdate(read_options, "foo2", &value);
// should succeed since key was written before txn started
ASSERT_OK(s);
// verify foo2 is locked by txn
s = db->Delete(write_options, "foo2");
ASSERT_TRUE(s.IsTimedOut());
s = txn->Delete("S");
// Should fail after encountering a write to S in SST file
ASSERT_TRUE(s.IsBusy());
// Write a bunch of keys to db to force a compaction
Random rnd(47);
for (int i = 0; i < 1000; i++) {
s = db->Put(write_options, std::to_string(i),
test::CompressibleString(&rnd, 0.8, 100, &value));
ASSERT_OK(s);
}
s = txn->Put("X", "yy");
// Should succeed after verifying there is no write to X in SST file
ASSERT_OK(s);
s = txn->Put("Z", "zzz");
// Should fail after encountering a write to Z in SST file
ASSERT_TRUE(s.IsBusy());
s = txn->Delete("S");
// Should fail after encountering a write to S in SST file
ASSERT_TRUE(s.IsBusy());
s = txn->GetForUpdate(read_options, "foo3", &value);
// should succeed since key was written before txn started
ASSERT_OK(s);
// verify foo3 is locked by txn
s = db->Delete(write_options, "foo3");
ASSERT_TRUE(s.IsTimedOut());
db_impl->TEST_WaitForCompact();
s = txn->Commit();
ASSERT_OK(s);
// Transaction should only write the keys that succeeded.
s = db->Get(read_options, "foo", &value);
ASSERT_EQ(value, "bar2");
s = db->Get(read_options, "X", &value);
ASSERT_OK(s);
ASSERT_EQ("yy", value);
s = db->Get(read_options, "Z", &value);
ASSERT_OK(s);
ASSERT_EQ("z", value);
delete txn;
}
}
TEST_P(TransactionTest, NoSnapshotTest) {
WriteOptions write_options;
ReadOptions read_options;
std::string value;
Status s;
db->Put(write_options, "AAA", "bar");
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
// Modify key after transaction start
db->Put(write_options, "AAA", "bar1");
// Read and write without a snap
txn->GetForUpdate(read_options, "AAA", &value);
ASSERT_EQ(value, "bar1");
s = txn->Put("AAA", "bar2");
ASSERT_OK(s);
// Should commit since read/write was done after data changed
s = txn->Commit();
ASSERT_OK(s);
txn->GetForUpdate(read_options, "AAA", &value);
ASSERT_EQ(value, "bar2");
delete txn;
}
TEST_P(TransactionTest, MultipleSnapshotTest) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
std::string value;
Status s;
ASSERT_OK(db->Put(write_options, "AAA", "bar"));
ASSERT_OK(db->Put(write_options, "BBB", "bar"));
ASSERT_OK(db->Put(write_options, "CCC", "bar"));
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
db->Put(write_options, "AAA", "bar1");
// Read and write without a snapshot
ASSERT_OK(txn->GetForUpdate(read_options, "AAA", &value));
ASSERT_EQ(value, "bar1");
s = txn->Put("AAA", "bar2");
ASSERT_OK(s);
// Modify BBB before snapshot is taken
ASSERT_OK(db->Put(write_options, "BBB", "bar1"));
txn->SetSnapshot();
snapshot_read_options.snapshot = txn->GetSnapshot();
// Read and write with snapshot
ASSERT_OK(txn->GetForUpdate(snapshot_read_options, "BBB", &value));
ASSERT_EQ(value, "bar1");
s = txn->Put("BBB", "bar2");
ASSERT_OK(s);
ASSERT_OK(db->Put(write_options, "CCC", "bar1"));
// Set a new snapshot
txn->SetSnapshot();
snapshot_read_options.snapshot = txn->GetSnapshot();
// Read and write with snapshot
txn->GetForUpdate(snapshot_read_options, "CCC", &value);
ASSERT_EQ(value, "bar1");
s = txn->Put("CCC", "bar2");
ASSERT_OK(s);
s = txn->GetForUpdate(read_options, "AAA", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar2");
s = txn->GetForUpdate(read_options, "BBB", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar2");
s = txn->GetForUpdate(read_options, "CCC", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar2");
s = db->Get(read_options, "AAA", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar1");
s = db->Get(read_options, "BBB", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar1");
s = db->Get(read_options, "CCC", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar1");
s = txn->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "AAA", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar2");
s = db->Get(read_options, "BBB", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar2");
s = db->Get(read_options, "CCC", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar2");
// verify that we track multiple writes to the same key at different snapshots
delete txn;
txn = db->BeginTransaction(write_options);
// Potentially conflicting writes
db->Put(write_options, "ZZZ", "zzz");
db->Put(write_options, "XXX", "xxx");
txn->SetSnapshot();
TransactionOptions txn_options;
txn_options.set_snapshot = true;
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
txn2->SetSnapshot();
// This should not conflict in txn since the snapshot is later than the
// previous write (spoiler alert: it will later conflict with txn2).
s = txn->Put("ZZZ", "zzzz");
ASSERT_OK(s);
s = txn->Commit();
ASSERT_OK(s);
delete txn;
// This will conflict since the snapshot is earlier than another write to ZZZ
s = txn2->Put("ZZZ", "xxxxx");
ASSERT_TRUE(s.IsBusy());
s = txn2->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "ZZZ", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "zzzz");
delete txn2;
}
TEST_P(TransactionTest, ColumnFamiliesTest) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
TransactionOptions txn_options;
string value;
Status s;
ColumnFamilyHandle *cfa, *cfb;
ColumnFamilyOptions cf_options;
// Create 2 new column families
s = db->CreateColumnFamily(cf_options, "CFA", &cfa);
ASSERT_OK(s);
s = db->CreateColumnFamily(cf_options, "CFB", &cfb);
ASSERT_OK(s);
delete cfa;
delete cfb;
delete db;
db = nullptr;
// open DB with three column families
std::vector<ColumnFamilyDescriptor> column_families;
// have to open default column family
column_families.push_back(
ColumnFamilyDescriptor(kDefaultColumnFamilyName, ColumnFamilyOptions()));
// open the new column families
column_families.push_back(
ColumnFamilyDescriptor("CFA", ColumnFamilyOptions()));
column_families.push_back(
ColumnFamilyDescriptor("CFB", ColumnFamilyOptions()));
std::vector<ColumnFamilyHandle*> handles;
s = TransactionDB::Open(options, txn_db_options, dbname, column_families,
&handles, &db);
assert(db != nullptr);
ASSERT_OK(s);
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
txn->SetSnapshot();
snapshot_read_options.snapshot = txn->GetSnapshot();
txn_options.set_snapshot = true;
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn2);
// Write some data to the db
WriteBatch batch;
batch.Put("foo", "foo");
batch.Put(handles[1], "AAA", "bar");
batch.Put(handles[1], "AAAZZZ", "bar");
s = db->Write(write_options, &batch);
ASSERT_OK(s);
db->Delete(write_options, handles[1], "AAAZZZ");
// These keys do not conflict with existing writes since they're in
// different column families
s = txn->Delete("AAA");
ASSERT_OK(s);
s = txn->GetForUpdate(snapshot_read_options, handles[1], "foo", &value);
ASSERT_TRUE(s.IsNotFound());
Slice key_slice("AAAZZZ");
Slice value_slices[2] = {Slice("bar"), Slice("bar")};
s = txn->Put(handles[2], SliceParts(&key_slice, 1),
SliceParts(value_slices, 2));
ASSERT_OK(s);
ASSERT_EQ(3, txn->GetNumKeys());
s = txn->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "AAA", &value);
ASSERT_TRUE(s.IsNotFound());
s = db->Get(read_options, handles[2], "AAAZZZ", &value);
ASSERT_EQ(value, "barbar");
Slice key_slices[3] = {Slice("AAA"), Slice("ZZ"), Slice("Z")};
Slice value_slice("barbarbar");
s = txn2->Delete(handles[2], "XXX");
ASSERT_OK(s);
s = txn2->Delete(handles[1], "XXX");
ASSERT_OK(s);
// This write will cause a conflict with the earlier batch write
s = txn2->Put(handles[1], SliceParts(key_slices, 3),
SliceParts(&value_slice, 1));
ASSERT_TRUE(s.IsBusy());
s = txn2->Commit();
ASSERT_OK(s);
// In the above the latest change to AAAZZZ in handles[1] is delete.
s = db->Get(read_options, handles[1], "AAAZZZ", &value);
ASSERT_TRUE(s.IsNotFound());
delete txn;
delete txn2;
txn = db->BeginTransaction(write_options, txn_options);
snapshot_read_options.snapshot = txn->GetSnapshot();
txn2 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn);
std::vector<ColumnFamilyHandle*> multiget_cfh = {handles[1], handles[2],
handles[0], handles[2]};
std::vector<Slice> multiget_keys = {"AAA", "AAAZZZ", "foo", "foo"};
std::vector<std::string> values(4);
std::vector<Status> results = txn->MultiGetForUpdate(
snapshot_read_options, multiget_cfh, multiget_keys, &values);
ASSERT_OK(results[0]);
ASSERT_OK(results[1]);
ASSERT_OK(results[2]);
ASSERT_TRUE(results[3].IsNotFound());
ASSERT_EQ(values[0], "bar");
ASSERT_EQ(values[1], "barbar");
ASSERT_EQ(values[2], "foo");
s = txn->SingleDelete(handles[2], "ZZZ");
ASSERT_OK(s);
s = txn->Put(handles[2], "ZZZ", "YYY");
ASSERT_OK(s);
s = txn->Put(handles[2], "ZZZ", "YYYY");
ASSERT_OK(s);
s = txn->Delete(handles[2], "ZZZ");
ASSERT_OK(s);
s = txn->Put(handles[2], "AAAZZZ", "barbarbar");
ASSERT_OK(s);
ASSERT_EQ(5, txn->GetNumKeys());
// Txn should commit
s = txn->Commit();
ASSERT_OK(s);
s = db->Get(read_options, handles[2], "ZZZ", &value);
ASSERT_TRUE(s.IsNotFound());
// Put a key which will conflict with the next txn using the previous snapshot
db->Put(write_options, handles[2], "foo", "000");
results = txn2->MultiGetForUpdate(snapshot_read_options, multiget_cfh,
multiget_keys, &values);
// All results should fail since there was a conflict
ASSERT_TRUE(results[0].IsBusy());
ASSERT_TRUE(results[1].IsBusy());
ASSERT_TRUE(results[2].IsBusy());
ASSERT_TRUE(results[3].IsBusy());
s = db->Get(read_options, handles[2], "foo", &value);
ASSERT_EQ(value, "000");
s = txn2->Commit();
ASSERT_OK(s);
s = db->DropColumnFamily(handles[1]);
ASSERT_OK(s);
s = db->DropColumnFamily(handles[2]);
ASSERT_OK(s);
delete txn;
delete txn2;
for (auto handle : handles) {
delete handle;
}
}
TEST_P(TransactionTest, MultiGetBatchedTest) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
TransactionOptions txn_options;
string value;
Status s;
ColumnFamilyHandle* cf;
ColumnFamilyOptions cf_options;
// Create a new column families
s = db->CreateColumnFamily(cf_options, "CF", &cf);
ASSERT_OK(s);
delete cf;
delete db;
db = nullptr;
// open DB with three column families
std::vector<ColumnFamilyDescriptor> column_families;
// have to open default column family
column_families.push_back(
ColumnFamilyDescriptor(kDefaultColumnFamilyName, ColumnFamilyOptions()));
// open the new column families
cf_options.merge_operator = MergeOperators::CreateStringAppendOperator();
column_families.push_back(ColumnFamilyDescriptor("CF", cf_options));
std::vector<ColumnFamilyHandle*> handles;
options.merge_operator = MergeOperators::CreateStringAppendOperator();
s = TransactionDB::Open(options, txn_db_options, dbname, column_families,
&handles, &db);
assert(db != nullptr);
ASSERT_OK(s);
// Write some data to the db
WriteBatch batch;
batch.Put(handles[1], "aaa", "val1");
batch.Put(handles[1], "bbb", "val2");
batch.Put(handles[1], "ccc", "val3");
batch.Put(handles[1], "ddd", "foo");
batch.Put(handles[1], "eee", "val5");
batch.Put(handles[1], "fff", "val6");
batch.Merge(handles[1], "ggg", "foo");
s = db->Write(write_options, &batch);
ASSERT_OK(s);
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
txn->SetSnapshot();
snapshot_read_options.snapshot = txn->GetSnapshot();
txn_options.set_snapshot = true;
// Write some data to the db
s = txn->Delete(handles[1], "bbb");
ASSERT_OK(s);
s = txn->Put(handles[1], "ccc", "val3_new");
ASSERT_OK(s);
s = txn->Merge(handles[1], "ddd", "bar");
ASSERT_OK(s);
std::vector<Slice> keys = {"aaa", "bbb", "ccc", "ddd", "eee", "fff", "ggg"};
std::vector<PinnableSlice> values(keys.size());
std::vector<Status> statuses(keys.size());
txn->MultiGet(snapshot_read_options, handles[1], keys.size(), keys.data(),
values.data(), statuses.data());
ASSERT_TRUE(statuses[0].ok());
ASSERT_EQ(values[0], "val1");
ASSERT_TRUE(statuses[1].IsNotFound());
ASSERT_TRUE(statuses[2].ok());
ASSERT_EQ(values[2], "val3_new");
ASSERT_TRUE(statuses[3].IsMergeInProgress());
ASSERT_TRUE(statuses[4].ok());
ASSERT_EQ(values[4], "val5");
ASSERT_TRUE(statuses[5].ok());
ASSERT_EQ(values[5], "val6");
ASSERT_TRUE(statuses[6].ok());
ASSERT_EQ(values[6], "foo");
delete txn;
for (auto handle : handles) {
delete handle;
}
}
TEST_P(TransactionTest, ColumnFamiliesTest2) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
string value;
Status s;
ColumnFamilyHandle *one, *two;
ColumnFamilyOptions cf_options;
// Create 2 new column families
s = db->CreateColumnFamily(cf_options, "ONE", &one);
ASSERT_OK(s);
s = db->CreateColumnFamily(cf_options, "TWO", &two);
ASSERT_OK(s);
Transaction* txn1 = db->BeginTransaction(write_options);
ASSERT_TRUE(txn1);
Transaction* txn2 = db->BeginTransaction(write_options);
ASSERT_TRUE(txn2);
s = txn1->Put(one, "X", "1");
ASSERT_OK(s);
s = txn1->Put(two, "X", "2");
ASSERT_OK(s);
s = txn1->Put("X", "0");
ASSERT_OK(s);
s = txn2->Put(one, "X", "11");
ASSERT_TRUE(s.IsTimedOut());
s = txn1->Commit();
ASSERT_OK(s);
// Drop first column family
s = db->DropColumnFamily(one);
ASSERT_OK(s);
// Should fail since column family was dropped.
s = txn2->Commit();
ASSERT_OK(s);
delete txn1;
txn1 = db->BeginTransaction(write_options);
ASSERT_TRUE(txn1);
// Should fail since column family was dropped
s = txn1->Put(one, "X", "111");
ASSERT_TRUE(s.IsInvalidArgument());
s = txn1->Put(two, "X", "222");
ASSERT_OK(s);
s = txn1->Put("X", "000");
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
s = db->Get(read_options, two, "X", &value);
ASSERT_OK(s);
ASSERT_EQ("222", value);
s = db->Get(read_options, "X", &value);
ASSERT_OK(s);
ASSERT_EQ("000", value);
s = db->DropColumnFamily(two);
ASSERT_OK(s);
delete txn1;
delete txn2;
delete one;
delete two;
}
TEST_P(TransactionTest, EmptyTest) {
WriteOptions write_options;
ReadOptions read_options;
string value;
Status s;
s = db->Put(write_options, "aaa", "aaa");
ASSERT_OK(s);
Transaction* txn = db->BeginTransaction(write_options);
s = txn->Commit();
ASSERT_OK(s);
delete txn;
txn = db->BeginTransaction(write_options);
txn->Rollback();
delete txn;
txn = db->BeginTransaction(write_options);
s = txn->GetForUpdate(read_options, "aaa", &value);
ASSERT_EQ(value, "aaa");
s = txn->Commit();
ASSERT_OK(s);
delete txn;
txn = db->BeginTransaction(write_options);
txn->SetSnapshot();
s = txn->GetForUpdate(read_options, "aaa", &value);
ASSERT_EQ(value, "aaa");
// Conflicts with previous GetForUpdate
s = db->Put(write_options, "aaa", "xxx");
ASSERT_TRUE(s.IsTimedOut());
// transaction expired!
s = txn->Commit();
ASSERT_OK(s);
delete txn;
}
TEST_P(TransactionTest, PredicateManyPreceders) {
WriteOptions write_options;
ReadOptions read_options1, read_options2;
TransactionOptions txn_options;
string value;
Status s;
txn_options.set_snapshot = true;
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
read_options1.snapshot = txn1->GetSnapshot();
Transaction* txn2 = db->BeginTransaction(write_options);
txn2->SetSnapshot();
read_options2.snapshot = txn2->GetSnapshot();
std::vector<Slice> multiget_keys = {"1", "2", "3"};
std::vector<std::string> multiget_values;
std::vector<Status> results =
txn1->MultiGetForUpdate(read_options1, multiget_keys, &multiget_values);
ASSERT_TRUE(results[1].IsNotFound());
s = txn2->Put("2", "x"); // Conflict's with txn1's MultiGetForUpdate
ASSERT_TRUE(s.IsTimedOut());
txn2->Rollback();
multiget_values.clear();
results =
txn1->MultiGetForUpdate(read_options1, multiget_keys, &multiget_values);
ASSERT_TRUE(results[1].IsNotFound());
s = txn1->Commit();
ASSERT_OK(s);
delete txn1;
delete txn2;
txn1 = db->BeginTransaction(write_options, txn_options);
read_options1.snapshot = txn1->GetSnapshot();
txn2 = db->BeginTransaction(write_options, txn_options);
read_options2.snapshot = txn2->GetSnapshot();
s = txn1->Put("4", "x");
ASSERT_OK(s);
s = txn2->Delete("4"); // conflict
ASSERT_TRUE(s.IsTimedOut());
s = txn1->Commit();
ASSERT_OK(s);
s = txn2->GetForUpdate(read_options2, "4", &value);
ASSERT_TRUE(s.IsBusy());
txn2->Rollback();
delete txn1;
delete txn2;
}
TEST_P(TransactionTest, LostUpdate) {
WriteOptions write_options;
ReadOptions read_options, read_options1, read_options2;
TransactionOptions txn_options;
std::string value;
Status s;
// Test 2 transactions writing to the same key in multiple orders and
// with/without snapshots
Transaction* txn1 = db->BeginTransaction(write_options);
Transaction* txn2 = db->BeginTransaction(write_options);
s = txn1->Put("1", "1");
ASSERT_OK(s);
s = txn2->Put("1", "2"); // conflict
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Commit();
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "1", &value);
ASSERT_OK(s);
ASSERT_EQ("1", value);
delete txn1;
delete txn2;
txn_options.set_snapshot = true;
txn1 = db->BeginTransaction(write_options, txn_options);
read_options1.snapshot = txn1->GetSnapshot();
txn2 = db->BeginTransaction(write_options, txn_options);
read_options2.snapshot = txn2->GetSnapshot();
s = txn1->Put("1", "3");
ASSERT_OK(s);
s = txn2->Put("1", "4"); // conflict
ASSERT_TRUE(s.IsTimedOut());
s = txn1->Commit();
ASSERT_OK(s);
s = txn2->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "1", &value);
ASSERT_OK(s);
ASSERT_EQ("3", value);
delete txn1;
delete txn2;
txn1 = db->BeginTransaction(write_options, txn_options);
read_options1.snapshot = txn1->GetSnapshot();
txn2 = db->BeginTransaction(write_options, txn_options);
read_options2.snapshot = txn2->GetSnapshot();
s = txn1->Put("1", "5");
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
s = txn2->Put("1", "6");
ASSERT_TRUE(s.IsBusy());
s = txn2->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "1", &value);
ASSERT_OK(s);
ASSERT_EQ("5", value);
delete txn1;
delete txn2;
txn1 = db->BeginTransaction(write_options, txn_options);
read_options1.snapshot = txn1->GetSnapshot();
txn2 = db->BeginTransaction(write_options, txn_options);
read_options2.snapshot = txn2->GetSnapshot();
s = txn1->Put("1", "7");
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
txn2->SetSnapshot();
s = txn2->Put("1", "8");
ASSERT_OK(s);
s = txn2->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "1", &value);
ASSERT_OK(s);
ASSERT_EQ("8", value);
delete txn1;
delete txn2;
txn1 = db->BeginTransaction(write_options);
txn2 = db->BeginTransaction(write_options);
s = txn1->Put("1", "9");
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
s = txn2->Put("1", "10");
ASSERT_OK(s);
s = txn2->Commit();
ASSERT_OK(s);
delete txn1;
delete txn2;
s = db->Get(read_options, "1", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "10");
}
TEST_P(TransactionTest, UntrackedWrites) {
WriteOptions write_options;
ReadOptions read_options;
std::string value;
Status s;
// Verify transaction rollback works for untracked keys.
Transaction* txn = db->BeginTransaction(write_options);
txn->SetSnapshot();
s = txn->PutUntracked("untracked", "0");
ASSERT_OK(s);
txn->Rollback();
s = db->Get(read_options, "untracked", &value);
ASSERT_TRUE(s.IsNotFound());
delete txn;
txn = db->BeginTransaction(write_options);
txn->SetSnapshot();
s = db->Put(write_options, "untracked", "x");
ASSERT_OK(s);
// Untracked writes should succeed even though key was written after snapshot
s = txn->PutUntracked("untracked", "1");
ASSERT_OK(s);
s = txn->MergeUntracked("untracked", "2");
ASSERT_OK(s);
s = txn->DeleteUntracked("untracked");
ASSERT_OK(s);
// Conflict
s = txn->Put("untracked", "3");
ASSERT_TRUE(s.IsBusy());
s = txn->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "untracked", &value);
ASSERT_TRUE(s.IsNotFound());
delete txn;
}
TEST_P(TransactionTest, ExpiredTransaction) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
string value;
Status s;
// Set txn expiration timeout to 0 microseconds (expires instantly)
txn_options.expiration = 0;
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
s = txn1->Put("X", "1");
ASSERT_OK(s);
s = txn1->Put("Y", "1");
ASSERT_OK(s);
Transaction* txn2 = db->BeginTransaction(write_options);
// txn2 should be able to write to X since txn1 has expired
s = txn2->Put("X", "2");
ASSERT_OK(s);
s = txn2->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "X", &value);
ASSERT_OK(s);
ASSERT_EQ("2", value);
s = txn1->Put("Z", "1");
ASSERT_OK(s);
// txn1 should fail to commit since it is expired
s = txn1->Commit();
ASSERT_TRUE(s.IsExpired());
s = db->Get(read_options, "Y", &value);
ASSERT_TRUE(s.IsNotFound());
s = db->Get(read_options, "Z", &value);
ASSERT_TRUE(s.IsNotFound());
delete txn1;
delete txn2;
}
TEST_P(TransactionTest, ReinitializeTest) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
std::string value;
Status s;
// Set txn expiration timeout to 0 microseconds (expires instantly)
txn_options.expiration = 0;
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
// Reinitialize transaction to no long expire
txn_options.expiration = -1;
txn1 = db->BeginTransaction(write_options, txn_options, txn1);
s = txn1->Put("Z", "z");
ASSERT_OK(s);
// Should commit since not expired
s = txn1->Commit();
ASSERT_OK(s);
txn1 = db->BeginTransaction(write_options, txn_options, txn1);
s = txn1->Put("Z", "zz");
ASSERT_OK(s);
// Reinitilize txn1 and verify that Z gets unlocked
txn1 = db->BeginTransaction(write_options, txn_options, txn1);
Transaction* txn2 = db->BeginTransaction(write_options, txn_options, nullptr);
s = txn2->Put("Z", "zzz");
ASSERT_OK(s);
s = txn2->Commit();
ASSERT_OK(s);
delete txn2;
s = db->Get(read_options, "Z", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "zzz");
// Verify snapshots get reinitialized correctly
txn1->SetSnapshot();
s = txn1->Put("Z", "zzzz");
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "Z", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "zzzz");
txn1 = db->BeginTransaction(write_options, txn_options, txn1);
const Snapshot* snapshot = txn1->GetSnapshot();
ASSERT_FALSE(snapshot);
txn_options.set_snapshot = true;
txn1 = db->BeginTransaction(write_options, txn_options, txn1);
snapshot = txn1->GetSnapshot();
ASSERT_TRUE(snapshot);
s = txn1->Put("Z", "a");
ASSERT_OK(s);
txn1->Rollback();
s = txn1->Put("Y", "y");
ASSERT_OK(s);
txn_options.set_snapshot = false;
txn1 = db->BeginTransaction(write_options, txn_options, txn1);
snapshot = txn1->GetSnapshot();
ASSERT_FALSE(snapshot);
s = txn1->Put("X", "x");
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "Z", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "zzzz");
s = db->Get(read_options, "Y", &value);
ASSERT_TRUE(s.IsNotFound());
txn1 = db->BeginTransaction(write_options, txn_options, txn1);
s = txn1->SetName("name");
ASSERT_OK(s);
s = txn1->Prepare();
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
txn1 = db->BeginTransaction(write_options, txn_options, txn1);
s = txn1->SetName("name");
ASSERT_OK(s);
delete txn1;
}
TEST_P(TransactionTest, Rollback) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
std::string value;
Status s;
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(s);
s = txn1->Put("X", "1");
ASSERT_OK(s);
Transaction* txn2 = db->BeginTransaction(write_options);
// txn2 should not be able to write to X since txn1 has it locked
s = txn2->Put("X", "2");
ASSERT_TRUE(s.IsTimedOut());
txn1->Rollback();
delete txn1;
// txn2 should now be able to write to X
s = txn2->Put("X", "3");
ASSERT_OK(s);
s = txn2->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "X", &value);
ASSERT_OK(s);
ASSERT_EQ("3", value);
delete txn2;
}
TEST_P(TransactionTest, LockLimitTest) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
TransactionOptions txn_options;
string value;
Status s;
delete db;
db = nullptr;
// Open DB with a lock limit of 3
txn_db_options.max_num_locks = 3;
s = TransactionDB::Open(options, txn_db_options, dbname, &db);
assert(db != nullptr);
ASSERT_OK(s);
// Create a txn and verify we can only lock up to 3 keys
Transaction* txn = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn);
s = txn->Put("X", "x");
ASSERT_OK(s);
s = txn->Put("Y", "y");
ASSERT_OK(s);
s = txn->Put("Z", "z");
ASSERT_OK(s);
// lock limit reached
s = txn->Put("W", "w");
ASSERT_TRUE(s.IsBusy());
// re-locking same key shouldn't put us over the limit
s = txn->Put("X", "xx");
ASSERT_OK(s);
s = txn->GetForUpdate(read_options, "W", &value);
ASSERT_TRUE(s.IsBusy());
s = txn->GetForUpdate(read_options, "V", &value);
ASSERT_TRUE(s.IsBusy());
// re-locking same key shouldn't put us over the limit
s = txn->GetForUpdate(read_options, "Y", &value);
ASSERT_OK(s);
ASSERT_EQ("y", value);
s = txn->Get(read_options, "W", &value);
ASSERT_TRUE(s.IsNotFound());
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn2);
// "X" currently locked
s = txn2->Put("X", "x");
ASSERT_TRUE(s.IsTimedOut());
// lock limit reached
s = txn2->Put("M", "m");
ASSERT_TRUE(s.IsBusy());
s = txn->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "X", &value);
ASSERT_OK(s);
ASSERT_EQ("xx", value);
s = db->Get(read_options, "W", &value);
ASSERT_TRUE(s.IsNotFound());
// Committing txn should release its locks and allow txn2 to proceed
s = txn2->Put("X", "x2");
ASSERT_OK(s);
s = txn2->Delete("X");
ASSERT_OK(s);
s = txn2->Put("M", "m");
ASSERT_OK(s);
s = txn2->Put("Z", "z2");
ASSERT_OK(s);
// lock limit reached
s = txn2->Delete("Y");
ASSERT_TRUE(s.IsBusy());
s = txn2->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "Z", &value);
ASSERT_OK(s);
ASSERT_EQ("z2", value);
s = db->Get(read_options, "Y", &value);
ASSERT_OK(s);
ASSERT_EQ("y", value);
s = db->Get(read_options, "X", &value);
ASSERT_TRUE(s.IsNotFound());
delete txn;
delete txn2;
}
TEST_P(TransactionTest, IteratorTest) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
std::string value;
Status s;
// Write some keys to the db
s = db->Put(write_options, "A", "a");
ASSERT_OK(s);
s = db->Put(write_options, "G", "g");
ASSERT_OK(s);
s = db->Put(write_options, "F", "f");
ASSERT_OK(s);
s = db->Put(write_options, "C", "c");
ASSERT_OK(s);
s = db->Put(write_options, "D", "d");
ASSERT_OK(s);
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
// Write some keys in a txn
s = txn->Put("B", "b");
ASSERT_OK(s);
s = txn->Put("H", "h");
ASSERT_OK(s);
s = txn->Delete("D");
ASSERT_OK(s);
s = txn->Put("E", "e");
ASSERT_OK(s);
txn->SetSnapshot();
const Snapshot* snapshot = txn->GetSnapshot();
// Write some keys to the db after the snapshot
s = db->Put(write_options, "BB", "xx");
ASSERT_OK(s);
s = db->Put(write_options, "C", "xx");
ASSERT_OK(s);
read_options.snapshot = snapshot;
Iterator* iter = txn->GetIterator(read_options);
ASSERT_OK(iter->status());
iter->SeekToFirst();
// Read all keys via iter and lock them all
std::string results[] = {"a", "b", "c", "e", "f", "g", "h"};
for (int i = 0; i < 7; i++) {
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ(results[i], iter->value().ToString());
s = txn->GetForUpdate(read_options, iter->key(), nullptr);
if (i == 2) {
// "C" was modified after txn's snapshot
ASSERT_TRUE(s.IsBusy());
} else {
ASSERT_OK(s);
}
iter->Next();
}
ASSERT_FALSE(iter->Valid());
iter->Seek("G");
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("g", iter->value().ToString());
iter->Prev();
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("f", iter->value().ToString());
iter->Seek("D");
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("e", iter->value().ToString());
iter->Seek("C");
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("c", iter->value().ToString());
iter->Next();
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("e", iter->value().ToString());
iter->Seek("");
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("a", iter->value().ToString());
iter->Seek("X");
ASSERT_OK(iter->status());
ASSERT_FALSE(iter->Valid());
iter->SeekToLast();
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("h", iter->value().ToString());
s = txn->Commit();
ASSERT_OK(s);
delete iter;
delete txn;
}
TEST_P(TransactionTest, DisableIndexingTest) {
WriteOptions write_options;
ReadOptions read_options;
std::string value;
Status s;
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
s = txn->Put("A", "a");
ASSERT_OK(s);
s = txn->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("a", value);
txn->DisableIndexing();
s = txn->Put("B", "b");
ASSERT_OK(s);
s = txn->Get(read_options, "B", &value);
ASSERT_TRUE(s.IsNotFound());
Iterator* iter = txn->GetIterator(read_options);
ASSERT_OK(iter->status());
iter->Seek("B");
ASSERT_OK(iter->status());
ASSERT_FALSE(iter->Valid());
s = txn->Delete("A");
s = txn->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("a", value);
txn->EnableIndexing();
s = txn->Put("B", "bb");
ASSERT_OK(s);
iter->Seek("B");
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("bb", iter->value().ToString());
s = txn->Get(read_options, "B", &value);
ASSERT_OK(s);
ASSERT_EQ("bb", value);
s = txn->Put("A", "aa");
ASSERT_OK(s);
s = txn->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("aa", value);
delete iter;
delete txn;
}
TEST_P(TransactionTest, SavepointTest) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
std::string value;
Status s;
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
ASSERT_EQ(0, txn->GetNumPuts());
s = txn->RollbackToSavePoint();
ASSERT_TRUE(s.IsNotFound());
txn->SetSavePoint(); // 1
ASSERT_OK(txn->RollbackToSavePoint()); // Rollback to beginning of txn
s = txn->RollbackToSavePoint();
ASSERT_TRUE(s.IsNotFound());
s = txn->Put("B", "b");
ASSERT_OK(s);
ASSERT_EQ(1, txn->GetNumPuts());
ASSERT_EQ(0, txn->GetNumDeletes());
s = txn->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "B", &value);
ASSERT_OK(s);
ASSERT_EQ("b", value);
delete txn;
txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
s = txn->Put("A", "a");
ASSERT_OK(s);
s = txn->Put("B", "bb");
ASSERT_OK(s);
s = txn->Put("C", "c");
ASSERT_OK(s);
txn->SetSavePoint(); // 2
s = txn->Delete("B");
ASSERT_OK(s);
s = txn->Put("C", "cc");
ASSERT_OK(s);
s = txn->Put("D", "d");
ASSERT_OK(s);
ASSERT_EQ(5, txn->GetNumPuts());
ASSERT_EQ(1, txn->GetNumDeletes());
ASSERT_OK(txn->RollbackToSavePoint()); // Rollback to 2
ASSERT_EQ(3, txn->GetNumPuts());
ASSERT_EQ(0, txn->GetNumDeletes());
s = txn->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("a", value);
s = txn->Get(read_options, "B", &value);
ASSERT_OK(s);
ASSERT_EQ("bb", value);
s = txn->Get(read_options, "C", &value);
ASSERT_OK(s);
ASSERT_EQ("c", value);
s = txn->Get(read_options, "D", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn->Put("A", "a");
ASSERT_OK(s);
s = txn->Put("E", "e");
ASSERT_OK(s);
ASSERT_EQ(5, txn->GetNumPuts());
ASSERT_EQ(0, txn->GetNumDeletes());
// Rollback to beginning of txn
s = txn->RollbackToSavePoint();
ASSERT_TRUE(s.IsNotFound());
txn->Rollback();
ASSERT_EQ(0, txn->GetNumPuts());
ASSERT_EQ(0, txn->GetNumDeletes());
s = txn->Get(read_options, "A", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn->Get(read_options, "B", &value);
ASSERT_OK(s);
ASSERT_EQ("b", value);
s = txn->Get(read_options, "D", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn->Get(read_options, "D", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn->Get(read_options, "E", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn->Put("A", "aa");
ASSERT_OK(s);
s = txn->Put("F", "f");
ASSERT_OK(s);
ASSERT_EQ(2, txn->GetNumPuts());
ASSERT_EQ(0, txn->GetNumDeletes());
txn->SetSavePoint(); // 3
txn->SetSavePoint(); // 4
s = txn->Put("G", "g");
ASSERT_OK(s);
s = txn->SingleDelete("F");
ASSERT_OK(s);
s = txn->Delete("B");
ASSERT_OK(s);
s = txn->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("aa", value);
s = txn->Get(read_options, "F", &value);
// According to db.h, doing a SingleDelete on a key that has been
// overwritten will have undefinied behavior. So it is unclear what the
// result of fetching "F" should be. The current implementation will
// return NotFound in this case.
ASSERT_TRUE(s.IsNotFound());
s = txn->Get(read_options, "B", &value);
ASSERT_TRUE(s.IsNotFound());
ASSERT_EQ(3, txn->GetNumPuts());
ASSERT_EQ(2, txn->GetNumDeletes());
ASSERT_OK(txn->RollbackToSavePoint()); // Rollback to 3
ASSERT_EQ(2, txn->GetNumPuts());
ASSERT_EQ(0, txn->GetNumDeletes());
s = txn->Get(read_options, "F", &value);
ASSERT_OK(s);
ASSERT_EQ("f", value);
s = txn->Get(read_options, "G", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "F", &value);
ASSERT_OK(s);
ASSERT_EQ("f", value);
s = db->Get(read_options, "G", &value);
ASSERT_TRUE(s.IsNotFound());
s = db->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("aa", value);
s = db->Get(read_options, "B", &value);
ASSERT_OK(s);
ASSERT_EQ("b", value);
s = db->Get(read_options, "C", &value);
ASSERT_TRUE(s.IsNotFound());
s = db->Get(read_options, "D", &value);
ASSERT_TRUE(s.IsNotFound());
s = db->Get(read_options, "E", &value);
ASSERT_TRUE(s.IsNotFound());
delete txn;
}
TEST_P(TransactionTest, SavepointTest2) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
Status s;
txn_options.lock_timeout = 1; // 1 ms
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn1);
s = txn1->Put("A", "");
ASSERT_OK(s);
txn1->SetSavePoint(); // 1
s = txn1->Put("A", "a");
ASSERT_OK(s);
s = txn1->Put("C", "c");
ASSERT_OK(s);
txn1->SetSavePoint(); // 2
s = txn1->Put("A", "a");
ASSERT_OK(s);
s = txn1->Put("B", "b");
ASSERT_OK(s);
ASSERT_OK(txn1->RollbackToSavePoint()); // Rollback to 2
// Verify that "A" and "C" is still locked while "B" is not
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn2);
s = txn2->Put("A", "a2");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("C", "c2");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("B", "b2");
ASSERT_OK(s);
s = txn1->Put("A", "aa");
ASSERT_OK(s);
s = txn1->Put("B", "bb");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Commit();
ASSERT_OK(s);
delete txn2;
s = txn1->Put("A", "aaa");
ASSERT_OK(s);
s = txn1->Put("B", "bbb");
ASSERT_OK(s);
s = txn1->Put("C", "ccc");
ASSERT_OK(s);
txn1->SetSavePoint(); // 3
ASSERT_OK(txn1->RollbackToSavePoint()); // Rollback to 3
// Verify that "A", "B", "C" are still locked
txn2 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn2);
s = txn2->Put("A", "a2");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("B", "b2");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("C", "c2");
ASSERT_TRUE(s.IsTimedOut());
ASSERT_OK(txn1->RollbackToSavePoint()); // Rollback to 1
// Verify that only "A" is locked
s = txn2->Put("A", "a3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("B", "b3");
ASSERT_OK(s);
s = txn2->Put("C", "c3po");
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
delete txn1;
// Verify "A" "C" "B" are no longer locked
s = txn2->Put("A", "a4");
ASSERT_OK(s);
s = txn2->Put("B", "b4");
ASSERT_OK(s);
s = txn2->Put("C", "c4");
ASSERT_OK(s);
s = txn2->Commit();
ASSERT_OK(s);
delete txn2;
}
TEST_P(TransactionTest, SavepointTest3) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
Status s;
txn_options.lock_timeout = 1; // 1 ms
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn1);
s = txn1->PopSavePoint(); // No SavePoint present
ASSERT_TRUE(s.IsNotFound());
s = txn1->Put("A", "");
ASSERT_OK(s);
s = txn1->PopSavePoint(); // Still no SavePoint present
ASSERT_TRUE(s.IsNotFound());
txn1->SetSavePoint(); // 1
s = txn1->Put("A", "a");
ASSERT_OK(s);
s = txn1->PopSavePoint(); // Remove 1
ASSERT_TRUE(txn1->RollbackToSavePoint().IsNotFound());
// Verify that "A" is still locked
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn2);
s = txn2->Put("A", "a2");
ASSERT_TRUE(s.IsTimedOut());
delete txn2;
txn1->SetSavePoint(); // 2
s = txn1->Put("B", "b");
ASSERT_OK(s);
txn1->SetSavePoint(); // 3
s = txn1->Put("B", "b2");
ASSERT_OK(s);
ASSERT_OK(txn1->RollbackToSavePoint()); // Roll back to 2
s = txn1->PopSavePoint();
ASSERT_OK(s);
s = txn1->PopSavePoint();
ASSERT_TRUE(s.IsNotFound());
s = txn1->Commit();
ASSERT_OK(s);
delete txn1;
std::string value;
// tnx1 should have modified "A" to "a"
s = db->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("a", value);
// tnx1 should have set "B" to just "b"
s = db->Get(read_options, "B", &value);
ASSERT_OK(s);
ASSERT_EQ("b", value);
s = db->Get(read_options, "C", &value);
ASSERT_TRUE(s.IsNotFound());
}
TEST_P(TransactionTest, UndoGetForUpdateTest) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
std::string value;
Status s;
txn_options.lock_timeout = 1; // 1 ms
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn1);
txn1->UndoGetForUpdate("A");
s = txn1->Commit();
ASSERT_OK(s);
delete txn1;
txn1 = db->BeginTransaction(write_options, txn_options);
txn1->UndoGetForUpdate("A");
s = txn1->GetForUpdate(read_options, "A", &value);
ASSERT_TRUE(s.IsNotFound());
// Verify that A is locked
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
s = txn2->Put("A", "a");
ASSERT_TRUE(s.IsTimedOut());
txn1->UndoGetForUpdate("A");
// Verify that A is now unlocked
s = txn2->Put("A", "a2");
ASSERT_OK(s);
txn2->Commit();
delete txn2;
s = db->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("a2", value);
s = txn1->Delete("A");
ASSERT_OK(s);
s = txn1->GetForUpdate(read_options, "A", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn1->Put("B", "b3");
ASSERT_OK(s);
s = txn1->GetForUpdate(read_options, "B", &value);
ASSERT_OK(s);
txn1->UndoGetForUpdate("A");
txn1->UndoGetForUpdate("B");
// Verify that A and B are still locked
txn2 = db->BeginTransaction(write_options, txn_options);
s = txn2->Put("A", "a4");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("B", "b4");
ASSERT_TRUE(s.IsTimedOut());
txn1->Rollback();
delete txn1;
// Verify that A and B are no longer locked
s = txn2->Put("A", "a5");
ASSERT_OK(s);
s = txn2->Put("B", "b5");
ASSERT_OK(s);
s = txn2->Commit();
delete txn2;
ASSERT_OK(s);
txn1 = db->BeginTransaction(write_options, txn_options);
s = txn1->GetForUpdate(read_options, "A", &value);
ASSERT_OK(s);
s = txn1->GetForUpdate(read_options, "A", &value);
ASSERT_OK(s);
s = txn1->GetForUpdate(read_options, "C", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn1->GetForUpdate(read_options, "A", &value);
ASSERT_OK(s);
s = txn1->GetForUpdate(read_options, "C", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn1->GetForUpdate(read_options, "B", &value);
ASSERT_OK(s);
s = txn1->Put("B", "b5");
s = txn1->GetForUpdate(read_options, "B", &value);
ASSERT_OK(s);
txn1->UndoGetForUpdate("A");
txn1->UndoGetForUpdate("B");
txn1->UndoGetForUpdate("C");
txn1->UndoGetForUpdate("X");
// Verify A,B,C are locked
txn2 = db->BeginTransaction(write_options, txn_options);
s = txn2->Put("A", "a6");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Delete("B");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("C", "c6");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("X", "x6");
ASSERT_OK(s);
txn1->UndoGetForUpdate("A");
txn1->UndoGetForUpdate("B");
txn1->UndoGetForUpdate("C");
txn1->UndoGetForUpdate("X");
// Verify A,B are locked and C is not
s = txn2->Put("A", "a6");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Delete("B");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("C", "c6");
ASSERT_OK(s);
s = txn2->Put("X", "x6");
ASSERT_OK(s);
txn1->UndoGetForUpdate("A");
txn1->UndoGetForUpdate("B");
txn1->UndoGetForUpdate("C");
txn1->UndoGetForUpdate("X");
// Verify B is locked and A and C are not
s = txn2->Put("A", "a7");
ASSERT_OK(s);
s = txn2->Delete("B");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("C", "c7");
ASSERT_OK(s);
s = txn2->Put("X", "x7");
ASSERT_OK(s);
s = txn2->Commit();
ASSERT_OK(s);
delete txn2;
s = txn1->Commit();
ASSERT_OK(s);
delete txn1;
}
TEST_P(TransactionTest, UndoGetForUpdateTest2) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
std::string value;
Status s;
s = db->Put(write_options, "A", "");
ASSERT_OK(s);
txn_options.lock_timeout = 1; // 1 ms
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn1);
s = txn1->GetForUpdate(read_options, "A", &value);
ASSERT_OK(s);
s = txn1->GetForUpdate(read_options, "B", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn1->Put("F", "f");
ASSERT_OK(s);
txn1->SetSavePoint(); // 1
txn1->UndoGetForUpdate("A");
s = txn1->GetForUpdate(read_options, "C", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn1->GetForUpdate(read_options, "D", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn1->Put("E", "e");
ASSERT_OK(s);
s = txn1->GetForUpdate(read_options, "E", &value);
ASSERT_OK(s);
s = txn1->GetForUpdate(read_options, "F", &value);
ASSERT_OK(s);
// Verify A,B,C,D,E,F are still locked
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
s = txn2->Put("A", "a1");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("B", "b1");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("C", "c1");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("D", "d1");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("E", "e1");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("F", "f1");
ASSERT_TRUE(s.IsTimedOut());
txn1->UndoGetForUpdate("C");
txn1->UndoGetForUpdate("E");
// Verify A,B,D,E,F are still locked and C is not.
s = txn2->Put("A", "a2");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("B", "b2");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("D", "d2");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("E", "e2");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("F", "f2");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("C", "c2");
ASSERT_OK(s);
txn1->SetSavePoint(); // 2
s = txn1->Put("H", "h");
ASSERT_OK(s);
txn1->UndoGetForUpdate("A");
txn1->UndoGetForUpdate("B");
txn1->UndoGetForUpdate("C");
txn1->UndoGetForUpdate("D");
txn1->UndoGetForUpdate("E");
txn1->UndoGetForUpdate("F");
txn1->UndoGetForUpdate("G");
txn1->UndoGetForUpdate("H");
// Verify A,B,D,E,F,H are still locked and C,G are not.
s = txn2->Put("A", "a3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("B", "b3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("D", "d3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("E", "e3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("F", "f3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("H", "h3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("C", "c3");
ASSERT_OK(s);
s = txn2->Put("G", "g3");
ASSERT_OK(s);
txn1->RollbackToSavePoint(); // rollback to 2
// Verify A,B,D,E,F are still locked and C,G,H are not.
s = txn2->Put("A", "a3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("B", "b3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("D", "d3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("E", "e3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("F", "f3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("C", "c3");
ASSERT_OK(s);
s = txn2->Put("G", "g3");
ASSERT_OK(s);
s = txn2->Put("H", "h3");
ASSERT_OK(s);
txn1->UndoGetForUpdate("A");
txn1->UndoGetForUpdate("B");
txn1->UndoGetForUpdate("C");
txn1->UndoGetForUpdate("D");
txn1->UndoGetForUpdate("E");
txn1->UndoGetForUpdate("F");
txn1->UndoGetForUpdate("G");
txn1->UndoGetForUpdate("H");
// Verify A,B,E,F are still locked and C,D,G,H are not.
s = txn2->Put("A", "a3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("B", "b3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("E", "e3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("F", "f3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("C", "c3");
ASSERT_OK(s);
s = txn2->Put("D", "d3");
ASSERT_OK(s);
s = txn2->Put("G", "g3");
ASSERT_OK(s);
s = txn2->Put("H", "h3");
ASSERT_OK(s);
txn1->RollbackToSavePoint(); // rollback to 1
// Verify A,B,F are still locked and C,D,E,G,H are not.
s = txn2->Put("A", "a3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("B", "b3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("F", "f3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("C", "c3");
ASSERT_OK(s);
s = txn2->Put("D", "d3");
ASSERT_OK(s);
s = txn2->Put("E", "e3");
ASSERT_OK(s);
s = txn2->Put("G", "g3");
ASSERT_OK(s);
s = txn2->Put("H", "h3");
ASSERT_OK(s);
txn1->UndoGetForUpdate("A");
txn1->UndoGetForUpdate("B");
txn1->UndoGetForUpdate("C");
txn1->UndoGetForUpdate("D");
txn1->UndoGetForUpdate("E");
txn1->UndoGetForUpdate("F");
txn1->UndoGetForUpdate("G");
txn1->UndoGetForUpdate("H");
// Verify F is still locked and A,B,C,D,E,G,H are not.
s = txn2->Put("F", "f3");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Put("A", "a3");
ASSERT_OK(s);
s = txn2->Put("B", "b3");
ASSERT_OK(s);
s = txn2->Put("C", "c3");
ASSERT_OK(s);
s = txn2->Put("D", "d3");
ASSERT_OK(s);
s = txn2->Put("E", "e3");
ASSERT_OK(s);
s = txn2->Put("G", "g3");
ASSERT_OK(s);
s = txn2->Put("H", "h3");
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
s = txn2->Commit();
ASSERT_OK(s);
delete txn1;
delete txn2;
}
TEST_P(TransactionTest, TimeoutTest) {
WriteOptions write_options;
ReadOptions read_options;
std::string value;
Status s;
delete db;
db = nullptr;
// transaction writes have an infinite timeout,
// but we will override this when we start a txn
// db writes have infinite timeout
txn_db_options.transaction_lock_timeout = -1;
txn_db_options.default_lock_timeout = -1;
s = TransactionDB::Open(options, txn_db_options, dbname, &db);
assert(db != nullptr);
ASSERT_OK(s);
s = db->Put(write_options, "aaa", "aaa");
ASSERT_OK(s);
TransactionOptions txn_options0;
txn_options0.expiration = 100; // 100ms
txn_options0.lock_timeout = 50; // txn timeout no longer infinite
Transaction* txn1 = db->BeginTransaction(write_options, txn_options0);
s = txn1->GetForUpdate(read_options, "aaa", nullptr);
ASSERT_OK(s);
// Conflicts with previous GetForUpdate.
// Since db writes do not have a timeout, this should eventually succeed when
// the transaction expires.
s = db->Put(write_options, "aaa", "xxx");
ASSERT_OK(s);
ASSERT_GE(txn1->GetElapsedTime(),
static_cast<uint64_t>(txn_options0.expiration));
s = txn1->Commit();
ASSERT_TRUE(s.IsExpired()); // expired!
s = db->Get(read_options, "aaa", &value);
ASSERT_OK(s);
ASSERT_EQ("xxx", value);
delete txn1;
delete db;
// transaction writes have 10ms timeout,
// db writes have infinite timeout
txn_db_options.transaction_lock_timeout = 50;
txn_db_options.default_lock_timeout = -1;
s = TransactionDB::Open(options, txn_db_options, dbname, &db);
ASSERT_OK(s);
s = db->Put(write_options, "aaa", "aaa");
ASSERT_OK(s);
TransactionOptions txn_options;
txn_options.expiration = 100; // 100ms
txn1 = db->BeginTransaction(write_options, txn_options);
s = txn1->GetForUpdate(read_options, "aaa", nullptr);
ASSERT_OK(s);
// Conflicts with previous GetForUpdate.
// Since db writes do not have a timeout, this should eventually succeed when
// the transaction expires.
s = db->Put(write_options, "aaa", "xxx");
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_NOK(s); // expired!
s = db->Get(read_options, "aaa", &value);
ASSERT_OK(s);
ASSERT_EQ("xxx", value);
delete txn1;
txn_options.expiration = 6000000; // 100 minutes
txn_options.lock_timeout = 1; // 1ms
txn1 = db->BeginTransaction(write_options, txn_options);
txn1->SetLockTimeout(100);
TransactionOptions txn_options2;
txn_options2.expiration = 10; // 10ms
Transaction* txn2 = db->BeginTransaction(write_options, txn_options2);
ASSERT_OK(s);
s = txn2->Put("a", "2");
ASSERT_OK(s);
// txn1 has a lock timeout longer than txn2's expiration, so it will win
s = txn1->Delete("a");
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
// txn2 should be expired out since txn1 waiting until its timeout expired.
s = txn2->Commit();
ASSERT_TRUE(s.IsExpired());
delete txn1;
delete txn2;
txn_options.expiration = 6000000; // 100 minutes
txn1 = db->BeginTransaction(write_options, txn_options);
txn_options2.expiration = 100000000;
txn2 = db->BeginTransaction(write_options, txn_options2);
s = txn1->Delete("asdf");
ASSERT_OK(s);
// txn2 has a smaller lock timeout than txn1's expiration, so it will time out
s = txn2->Delete("asdf");
ASSERT_TRUE(s.IsTimedOut());
ASSERT_EQ(s.ToString(), "Operation timed out: Timeout waiting to lock key");
s = txn1->Commit();
ASSERT_OK(s);
s = txn2->Put("asdf", "asdf");
ASSERT_OK(s);
s = txn2->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "asdf", &value);
ASSERT_OK(s);
ASSERT_EQ("asdf", value);
delete txn1;
delete txn2;
}
TEST_P(TransactionTest, SingleDeleteTest) {
WriteOptions write_options;
ReadOptions read_options;
std::string value;
Status s;
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
s = txn->SingleDelete("A");
ASSERT_OK(s);
s = txn->Get(read_options, "A", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn->Commit();
ASSERT_OK(s);
delete txn;
txn = db->BeginTransaction(write_options);
s = txn->SingleDelete("A");
ASSERT_OK(s);
s = txn->Put("A", "a");
ASSERT_OK(s);
s = txn->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("a", value);
s = txn->Commit();
ASSERT_OK(s);
delete txn;
s = db->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("a", value);
txn = db->BeginTransaction(write_options);
s = txn->SingleDelete("A");
ASSERT_OK(s);
s = txn->Get(read_options, "A", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn->Commit();
ASSERT_OK(s);
delete txn;
s = db->Get(read_options, "A", &value);
ASSERT_TRUE(s.IsNotFound());
txn = db->BeginTransaction(write_options);
Transaction* txn2 = db->BeginTransaction(write_options);
txn2->SetSnapshot();
s = txn->Put("A", "a");
ASSERT_OK(s);
s = txn->Put("A", "a2");
ASSERT_OK(s);
s = txn->SingleDelete("A");
ASSERT_OK(s);
s = txn->SingleDelete("B");
ASSERT_OK(s);
// According to db.h, doing a SingleDelete on a key that has been
// overwritten will have undefinied behavior. So it is unclear what the
// result of fetching "A" should be. The current implementation will
// return NotFound in this case.
s = txn->Get(read_options, "A", &value);
ASSERT_TRUE(s.IsNotFound());
s = txn2->Put("B", "b");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Commit();
ASSERT_OK(s);
delete txn2;
s = txn->Commit();
ASSERT_OK(s);
delete txn;
// According to db.h, doing a SingleDelete on a key that has been
// overwritten will have undefinied behavior. So it is unclear what the
// result of fetching "A" should be. The current implementation will
// return NotFound in this case.
s = db->Get(read_options, "A", &value);
ASSERT_TRUE(s.IsNotFound());
s = db->Get(read_options, "B", &value);
ASSERT_TRUE(s.IsNotFound());
}
TEST_P(TransactionTest, MergeTest) {
WriteOptions write_options;
ReadOptions read_options;
std::string value;
Status s;
Transaction* txn = db->BeginTransaction(write_options, TransactionOptions());
ASSERT_TRUE(txn);
s = db->Put(write_options, "A", "a0");
ASSERT_OK(s);
s = txn->Merge("A", "1");
ASSERT_OK(s);
s = txn->Merge("A", "2");
ASSERT_OK(s);
s = txn->Get(read_options, "A", &value);
ASSERT_TRUE(s.IsMergeInProgress());
s = txn->Put("A", "a");
ASSERT_OK(s);
s = txn->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("a", value);
s = txn->Merge("A", "3");
ASSERT_OK(s);
s = txn->Get(read_options, "A", &value);
ASSERT_TRUE(s.IsMergeInProgress());
TransactionOptions txn_options;
txn_options.lock_timeout = 1; // 1 ms
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn2);
// verify that txn has "A" locked
s = txn2->Merge("A", "4");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Commit();
ASSERT_OK(s);
delete txn2;
s = txn->Commit();
ASSERT_OK(s);
delete txn;
s = db->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("a,3", value);
}
TEST_P(TransactionTest, DeferSnapshotTest) {
WriteOptions write_options;
ReadOptions read_options;
std::string value;
Status s;
s = db->Put(write_options, "A", "a0");
ASSERT_OK(s);
Transaction* txn1 = db->BeginTransaction(write_options);
Transaction* txn2 = db->BeginTransaction(write_options);
txn1->SetSnapshotOnNextOperation();
auto snapshot = txn1->GetSnapshot();
ASSERT_FALSE(snapshot);
s = txn2->Put("A", "a2");
ASSERT_OK(s);
s = txn2->Commit();
ASSERT_OK(s);
delete txn2;
s = txn1->GetForUpdate(read_options, "A", &value);
// Should not conflict with txn2 since snapshot wasn't set until
// GetForUpdate was called.
ASSERT_OK(s);
ASSERT_EQ("a2", value);
s = txn1->Put("A", "a1");
ASSERT_OK(s);
s = db->Put(write_options, "B", "b0");
ASSERT_OK(s);
// Cannot lock B since it was written after the snapshot was set
s = txn1->Put("B", "b1");
ASSERT_TRUE(s.IsBusy());
s = txn1->Commit();
ASSERT_OK(s);
delete txn1;
s = db->Get(read_options, "A", &value);
ASSERT_OK(s);
ASSERT_EQ("a1", value);
s = db->Get(read_options, "B", &value);
ASSERT_OK(s);
ASSERT_EQ("b0", value);
}
TEST_P(TransactionTest, DeferSnapshotTest2) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
std::string value;
Status s;
Transaction* txn1 = db->BeginTransaction(write_options);
txn1->SetSnapshot();
s = txn1->Put("A", "a1");
ASSERT_OK(s);
s = db->Put(write_options, "C", "c0");
ASSERT_OK(s);
s = db->Put(write_options, "D", "d0");
ASSERT_OK(s);
snapshot_read_options.snapshot = txn1->GetSnapshot();
txn1->SetSnapshotOnNextOperation();
s = txn1->Get(snapshot_read_options, "C", &value);
// Snapshot was set before C was written
ASSERT_TRUE(s.IsNotFound());
s = txn1->Get(snapshot_read_options, "D", &value);
// Snapshot was set before D was written
ASSERT_TRUE(s.IsNotFound());
// Snapshot should not have changed yet.
snapshot_read_options.snapshot = txn1->GetSnapshot();
s = txn1->Get(snapshot_read_options, "C", &value);
// Snapshot was set before C was written
ASSERT_TRUE(s.IsNotFound());
s = txn1->Get(snapshot_read_options, "D", &value);
// Snapshot was set before D was written
ASSERT_TRUE(s.IsNotFound());
s = txn1->GetForUpdate(read_options, "C", &value);
ASSERT_OK(s);
ASSERT_EQ("c0", value);
s = db->Put(write_options, "D", "d00");
ASSERT_OK(s);
// Snapshot is now set
snapshot_read_options.snapshot = txn1->GetSnapshot();
s = txn1->Get(snapshot_read_options, "D", &value);
ASSERT_OK(s);
ASSERT_EQ("d0", value);
s = txn1->Commit();
ASSERT_OK(s);
delete txn1;
}
TEST_P(TransactionTest, DeferSnapshotSavePointTest) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
std::string value;
Status s;
Transaction* txn1 = db->BeginTransaction(write_options);
txn1->SetSavePoint(); // 1
s = db->Put(write_options, "T", "1");
ASSERT_OK(s);
txn1->SetSnapshotOnNextOperation();
s = db->Put(write_options, "T", "2");
ASSERT_OK(s);
txn1->SetSavePoint(); // 2
s = db->Put(write_options, "T", "3");
ASSERT_OK(s);
s = txn1->Put("A", "a");
ASSERT_OK(s);
txn1->SetSavePoint(); // 3
s = db->Put(write_options, "T", "4");
ASSERT_OK(s);
txn1->SetSnapshot();
txn1->SetSnapshotOnNextOperation();
txn1->SetSavePoint(); // 4
s = db->Put(write_options, "T", "5");
ASSERT_OK(s);
snapshot_read_options.snapshot = txn1->GetSnapshot();
s = txn1->Get(snapshot_read_options, "T", &value);
ASSERT_OK(s);
ASSERT_EQ("4", value);
s = txn1->Put("A", "a1");
ASSERT_OK(s);
snapshot_read_options.snapshot = txn1->GetSnapshot();
s = txn1->Get(snapshot_read_options, "T", &value);
ASSERT_OK(s);
ASSERT_EQ("5", value);
s = txn1->RollbackToSavePoint(); // Rollback to 4
ASSERT_OK(s);
snapshot_read_options.snapshot = txn1->GetSnapshot();
s = txn1->Get(snapshot_read_options, "T", &value);
ASSERT_OK(s);
ASSERT_EQ("4", value);
s = txn1->RollbackToSavePoint(); // Rollback to 3
ASSERT_OK(s);
snapshot_read_options.snapshot = txn1->GetSnapshot();
s = txn1->Get(snapshot_read_options, "T", &value);
ASSERT_OK(s);
ASSERT_EQ("3", value);
s = txn1->Get(read_options, "T", &value);
ASSERT_OK(s);
ASSERT_EQ("5", value);
s = txn1->RollbackToSavePoint(); // Rollback to 2
ASSERT_OK(s);
snapshot_read_options.snapshot = txn1->GetSnapshot();
ASSERT_FALSE(snapshot_read_options.snapshot);
s = txn1->Get(snapshot_read_options, "T", &value);
ASSERT_OK(s);
ASSERT_EQ("5", value);
s = txn1->Delete("A");
ASSERT_OK(s);
snapshot_read_options.snapshot = txn1->GetSnapshot();
ASSERT_TRUE(snapshot_read_options.snapshot);
s = txn1->Get(snapshot_read_options, "T", &value);
ASSERT_OK(s);
ASSERT_EQ("5", value);
s = txn1->RollbackToSavePoint(); // Rollback to 1
ASSERT_OK(s);
s = txn1->Delete("A");
ASSERT_OK(s);
snapshot_read_options.snapshot = txn1->GetSnapshot();
ASSERT_FALSE(snapshot_read_options.snapshot);
s = txn1->Get(snapshot_read_options, "T", &value);
ASSERT_OK(s);
ASSERT_EQ("5", value);
s = txn1->Commit();
ASSERT_OK(s);
delete txn1;
}
TEST_P(TransactionTest, SetSnapshotOnNextOperationWithNotification) {
WriteOptions write_options;
ReadOptions read_options;
std::string value;
class Notifier : public TransactionNotifier {
private:
const Snapshot** snapshot_ptr_;
public:
explicit Notifier(const Snapshot** snapshot_ptr)
: snapshot_ptr_(snapshot_ptr) {}
void SnapshotCreated(const Snapshot* newSnapshot) override {
*snapshot_ptr_ = newSnapshot;
}
};
std::shared_ptr<Notifier> notifier =
std::make_shared<Notifier>(&read_options.snapshot);
Status s;
s = db->Put(write_options, "B", "0");
ASSERT_OK(s);
Transaction* txn1 = db->BeginTransaction(write_options);
txn1->SetSnapshotOnNextOperation(notifier);
ASSERT_FALSE(read_options.snapshot);
s = db->Put(write_options, "B", "1");
ASSERT_OK(s);
// A Get does not generate the snapshot
s = txn1->Get(read_options, "B", &value);
ASSERT_OK(s);
ASSERT_FALSE(read_options.snapshot);
ASSERT_EQ(value, "1");
// Any other operation does
s = txn1->Put("A", "0");
ASSERT_OK(s);
// Now change "B".
s = db->Put(write_options, "B", "2");
ASSERT_OK(s);
// The original value should still be read
s = txn1->Get(read_options, "B", &value);
ASSERT_OK(s);
ASSERT_TRUE(read_options.snapshot);
ASSERT_EQ(value, "1");
s = txn1->Commit();
ASSERT_OK(s);
delete txn1;
}
TEST_P(TransactionTest, ClearSnapshotTest) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
std::string value;
Status s;
s = db->Put(write_options, "foo", "0");
ASSERT_OK(s);
Transaction* txn = db->BeginTransaction(write_options);
ASSERT_TRUE(txn);
s = db->Put(write_options, "foo", "1");
ASSERT_OK(s);
snapshot_read_options.snapshot = txn->GetSnapshot();
ASSERT_FALSE(snapshot_read_options.snapshot);
// No snapshot created yet
s = txn->Get(snapshot_read_options, "foo", &value);
ASSERT_EQ(value, "1");
txn->SetSnapshot();
snapshot_read_options.snapshot = txn->GetSnapshot();
ASSERT_TRUE(snapshot_read_options.snapshot);
s = db->Put(write_options, "foo", "2");
ASSERT_OK(s);
// Snapshot was created before change to '2'
s = txn->Get(snapshot_read_options, "foo", &value);
ASSERT_EQ(value, "1");
txn->ClearSnapshot();
snapshot_read_options.snapshot = txn->GetSnapshot();
ASSERT_FALSE(snapshot_read_options.snapshot);
// Snapshot has now been cleared
s = txn->Get(snapshot_read_options, "foo", &value);
ASSERT_EQ(value, "2");
s = txn->Commit();
ASSERT_OK(s);
delete txn;
}
TEST_P(TransactionTest, ToggleAutoCompactionTest) {
Status s;
ColumnFamilyHandle *cfa, *cfb;
ColumnFamilyOptions cf_options;
// Create 2 new column families
s = db->CreateColumnFamily(cf_options, "CFA", &cfa);
ASSERT_OK(s);
s = db->CreateColumnFamily(cf_options, "CFB", &cfb);
ASSERT_OK(s);
delete cfa;
delete cfb;
delete db;
// open DB with three column families
std::vector<ColumnFamilyDescriptor> column_families;
// have to open default column family
column_families.push_back(
ColumnFamilyDescriptor(kDefaultColumnFamilyName, ColumnFamilyOptions()));
// open the new column families
column_families.push_back(
ColumnFamilyDescriptor("CFA", ColumnFamilyOptions()));
column_families.push_back(
ColumnFamilyDescriptor("CFB", ColumnFamilyOptions()));
ColumnFamilyOptions* cf_opt_default = &column_families[0].options;
ColumnFamilyOptions* cf_opt_cfa = &column_families[1].options;
ColumnFamilyOptions* cf_opt_cfb = &column_families[2].options;
cf_opt_default->disable_auto_compactions = false;
cf_opt_cfa->disable_auto_compactions = true;
cf_opt_cfb->disable_auto_compactions = false;
std::vector<ColumnFamilyHandle*> handles;
s = TransactionDB::Open(options, txn_db_options, dbname, column_families,
&handles, &db);
ASSERT_OK(s);
auto cfh_default = reinterpret_cast<ColumnFamilyHandleImpl*>(handles[0]);
auto opt_default = *cfh_default->cfd()->GetLatestMutableCFOptions();
auto cfh_a = reinterpret_cast<ColumnFamilyHandleImpl*>(handles[1]);
auto opt_a = *cfh_a->cfd()->GetLatestMutableCFOptions();
auto cfh_b = reinterpret_cast<ColumnFamilyHandleImpl*>(handles[2]);
auto opt_b = *cfh_b->cfd()->GetLatestMutableCFOptions();
ASSERT_EQ(opt_default.disable_auto_compactions, false);
ASSERT_EQ(opt_a.disable_auto_compactions, true);
ASSERT_EQ(opt_b.disable_auto_compactions, false);
for (auto handle : handles) {
delete handle;
}
}
TEST_P(TransactionStressTest, ExpiredTransactionDataRace1) {
// In this test, txn1 should succeed committing,
// as the callback is called after txn1 starts committing.
rocksdb::SyncPoint::GetInstance()->LoadDependency(
{{"TransactionTest::ExpirableTransactionDataRace:1"}});
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"TransactionTest::ExpirableTransactionDataRace:1", [&](void* /*arg*/) {
WriteOptions write_options;
TransactionOptions txn_options;
// Force txn1 to expire
/* sleep override */
std::this_thread::sleep_for(std::chrono::milliseconds(150));
Transaction* txn2 = db->BeginTransaction(write_options, txn_options);
Status s;
s = txn2->Put("X", "2");
ASSERT_TRUE(s.IsTimedOut());
s = txn2->Commit();
ASSERT_OK(s);
delete txn2;
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
WriteOptions write_options;
TransactionOptions txn_options;
txn_options.expiration = 100;
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
Status s;
s = txn1->Put("X", "1");
ASSERT_OK(s);
s = txn1->Commit();
ASSERT_OK(s);
ReadOptions read_options;
string value;
s = db->Get(read_options, "X", &value);
ASSERT_EQ("1", value);
delete txn1;
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
#ifndef ROCKSDB_VALGRIND_RUN
namespace {
// cmt_delay_ms is the delay between prepare and commit
// first_id is the id of the first transaction
Status TransactionStressTestInserter(
TransactionDB* db, const size_t num_transactions, const size_t num_sets,
const size_t num_keys_per_set, Random64* rand,
const uint64_t cmt_delay_ms = 0, const uint64_t first_id = 0) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
if (rand->OneIn(2)) {
txn_options.use_only_the_last_commit_time_batch_for_recovery = true;
}
// Inside the inserter we might also retake the snapshot. We do both since two
// separte functions are engaged for each.
txn_options.set_snapshot = rand->OneIn(2);
RandomTransactionInserter inserter(
rand, write_options, read_options, num_keys_per_set,
static_cast<uint16_t>(num_sets), cmt_delay_ms, first_id);
for (size_t t = 0; t < num_transactions; t++) {
bool success = inserter.TransactionDBInsert(db, txn_options);
if (!success) {
// unexpected failure
return inserter.GetLastStatus();
}
}
// Make sure at least some of the transactions succeeded. It's ok if
// some failed due to write-conflicts.
if (num_transactions != 1 &&
inserter.GetFailureCount() > num_transactions / 2) {
return Status::TryAgain("Too many transactions failed! " +
std::to_string(inserter.GetFailureCount()) + " / " +
std::to_string(num_transactions));
}
return Status::OK();
}
} // namespace
// Worker threads add a number to a key from each set of keys. The checker
// threads verify that the sum of all keys in each set are equal.
TEST_P(MySQLStyleTransactionTest, TransactionStressTest) {
// Small write buffer to trigger more compactions
options.write_buffer_size = 1024;
ReOpenNoDelete();
const size_t num_workers = 4; // worker threads count
const size_t num_checkers = 2; // checker threads count
const size_t num_slow_checkers = 2; // checker threads emulating backups
const size_t num_slow_workers = 1; // slow worker threads count
const size_t num_transactions_per_thread = 10000;
const uint16_t num_sets = 3;
const size_t num_keys_per_set = 100;
// Setting the key-space to be 100 keys should cause enough write-conflicts
// to make this test interesting.
std::vector<port::Thread> threads;
std::atomic<uint32_t> finished = {0};
bool TAKE_SNAPSHOT = true;
uint64_t time_seed = env->NowMicros();
printf("time_seed is %" PRIu64 "\n", time_seed); // would help to reproduce
std::function<void()> call_inserter = [&] {
size_t thd_seed = std::hash<std::thread::id>()(std::this_thread::get_id());
Random64 rand(time_seed * thd_seed);
ASSERT_OK(TransactionStressTestInserter(db, num_transactions_per_thread,
num_sets, num_keys_per_set, &rand));
finished++;
};
std::function<void()> call_checker = [&] {
size_t thd_seed = std::hash<std::thread::id>()(std::this_thread::get_id());
Random64 rand(time_seed * thd_seed);
// Verify that data is consistent
while (finished < num_workers) {
Status s = RandomTransactionInserter::Verify(
db, num_sets, num_keys_per_set, TAKE_SNAPSHOT, &rand);
ASSERT_OK(s);
}
};
std::function<void()> call_slow_checker = [&] {
size_t thd_seed = std::hash<std::thread::id>()(std::this_thread::get_id());
Random64 rand(time_seed * thd_seed);
// Verify that data is consistent
while (finished < num_workers) {
uint64_t delay_ms = rand.Uniform(100) + 1;
Status s = RandomTransactionInserter::Verify(
db, num_sets, num_keys_per_set, TAKE_SNAPSHOT, &rand, delay_ms);
ASSERT_OK(s);
}
};
std::function<void()> call_slow_inserter = [&] {
size_t thd_seed = std::hash<std::thread::id>()(std::this_thread::get_id());
Random64 rand(time_seed * thd_seed);
uint64_t id = 0;
// Verify that data is consistent
while (finished < num_workers) {
uint64_t delay_ms = rand.Uniform(500) + 1;
ASSERT_OK(TransactionStressTestInserter(db, 1, num_sets, num_keys_per_set,
&rand, delay_ms, id++));
}
};
for (uint32_t i = 0; i < num_workers; i++) {
threads.emplace_back(call_inserter);
}
for (uint32_t i = 0; i < num_checkers; i++) {
threads.emplace_back(call_checker);
}
if (with_slow_threads_) {
for (uint32_t i = 0; i < num_slow_checkers; i++) {
threads.emplace_back(call_slow_checker);
}
for (uint32_t i = 0; i < num_slow_workers; i++) {
threads.emplace_back(call_slow_inserter);
}
}
// Wait for all threads to finish
for (auto& t : threads) {
t.join();
}
// Verify that data is consistent
Status s = RandomTransactionInserter::Verify(db, num_sets, num_keys_per_set,
!TAKE_SNAPSHOT);
ASSERT_OK(s);
}
#endif // ROCKSDB_VALGRIND_RUN
TEST_P(TransactionTest, MemoryLimitTest) {
TransactionOptions txn_options;
// Header (12 bytes) + NOOP (1 byte) + 2 * 8 bytes for data.
txn_options.max_write_batch_size = 29;
std::string value;
Status s;
Transaction* txn = db->BeginTransaction(WriteOptions(), txn_options);
ASSERT_TRUE(txn);
ASSERT_EQ(0, txn->GetNumPuts());
ASSERT_LE(0, txn->GetID());
s = txn->Put(Slice("a"), Slice("...."));
ASSERT_OK(s);
ASSERT_EQ(1, txn->GetNumPuts());
s = txn->Put(Slice("b"), Slice("...."));
ASSERT_OK(s);
ASSERT_EQ(2, txn->GetNumPuts());
s = txn->Put(Slice("b"), Slice("...."));
auto pdb = reinterpret_cast<PessimisticTransactionDB*>(db);
// For write unprepared, write batches exceeding max_write_batch_size will
// just flush to DB instead of returning a memory limit error.
if (pdb->GetTxnDBOptions().write_policy != WRITE_UNPREPARED) {
ASSERT_TRUE(s.IsMemoryLimit());
ASSERT_EQ(2, txn->GetNumPuts());
} else {
ASSERT_OK(s);
ASSERT_EQ(3, txn->GetNumPuts());
}
txn->Rollback();
delete txn;
}
// This test clarifies the existing expectation from the sequence number
// algorithm. It could detect mistakes in updating the code but it is not
// necessarily the one acceptable way. If the algorithm is legitimately changed,
// this unit test should be updated as well.
TEST_P(TransactionStressTest, SeqAdvanceTest) {
// TODO(myabandeh): must be test with false before new releases
const bool short_test = true;
WriteOptions wopts;
FlushOptions fopt;
options.disable_auto_compactions = true;
ASSERT_OK(ReOpen());
// Do the test with NUM_BRANCHES branches in it. Each run of a test takes some
// of the branches. This is the same as counting a binary number where i-th
// bit represents whether we take branch i in the represented by the number.
const size_t NUM_BRANCHES = short_test ? 6 : 10;
// Helper function that shows if the branch is to be taken in the run
// represented by the number n.
auto branch_do = [&](size_t n, size_t* branch) {
assert(*branch < NUM_BRANCHES);
const size_t filter = static_cast<size_t>(1) << *branch;
return n & filter;
};
const size_t max_n = static_cast<size_t>(1) << NUM_BRANCHES;
for (size_t n = 0; n < max_n; n++) {
DBImpl* db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
size_t branch = 0;
auto seq = db_impl->GetLatestSequenceNumber();
exp_seq = seq;
txn_t0(0);
seq = db_impl->TEST_GetLastVisibleSequence();
ASSERT_EQ(exp_seq, seq);
if (branch_do(n, &branch)) {
ASSERT_OK(db_impl->Flush(fopt));
seq = db_impl->TEST_GetLastVisibleSequence();
ASSERT_EQ(exp_seq, seq);
}
if (!short_test && branch_do(n, &branch)) {
ASSERT_OK(db_impl->FlushWAL(true));
ASSERT_OK(ReOpenNoDelete());
db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
seq = db_impl->GetLatestSequenceNumber();
ASSERT_EQ(exp_seq, seq);
}
// Doing it twice might detect some bugs
txn_t0(1);
seq = db_impl->TEST_GetLastVisibleSequence();
ASSERT_EQ(exp_seq, seq);
txn_t1(0);
seq = db_impl->TEST_GetLastVisibleSequence();
ASSERT_EQ(exp_seq, seq);
if (branch_do(n, &branch)) {
ASSERT_OK(db_impl->Flush(fopt));
seq = db_impl->TEST_GetLastVisibleSequence();
ASSERT_EQ(exp_seq, seq);
}
if (!short_test && branch_do(n, &branch)) {
ASSERT_OK(db_impl->FlushWAL(true));
ASSERT_OK(ReOpenNoDelete());
db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
seq = db_impl->GetLatestSequenceNumber();
ASSERT_EQ(exp_seq, seq);
}
txn_t3(0);
seq = db_impl->TEST_GetLastVisibleSequence();
ASSERT_EQ(exp_seq, seq);
if (branch_do(n, &branch)) {
ASSERT_OK(db_impl->Flush(fopt));
seq = db_impl->TEST_GetLastVisibleSequence();
ASSERT_EQ(exp_seq, seq);
}
if (!short_test && branch_do(n, &branch)) {
ASSERT_OK(db_impl->FlushWAL(true));
ASSERT_OK(ReOpenNoDelete());
db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
seq = db_impl->GetLatestSequenceNumber();
ASSERT_EQ(exp_seq, seq);
}
txn_t4(0);
seq = db_impl->TEST_GetLastVisibleSequence();
ASSERT_EQ(exp_seq, seq);
if (branch_do(n, &branch)) {
ASSERT_OK(db_impl->Flush(fopt));
seq = db_impl->TEST_GetLastVisibleSequence();
ASSERT_EQ(exp_seq, seq);
}
if (!short_test && branch_do(n, &branch)) {
ASSERT_OK(db_impl->FlushWAL(true));
ASSERT_OK(ReOpenNoDelete());
db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
seq = db_impl->GetLatestSequenceNumber();
ASSERT_EQ(exp_seq, seq);
}
txn_t2(0);
seq = db_impl->TEST_GetLastVisibleSequence();
ASSERT_EQ(exp_seq, seq);
if (branch_do(n, &branch)) {
ASSERT_OK(db_impl->Flush(fopt));
seq = db_impl->TEST_GetLastVisibleSequence();
ASSERT_EQ(exp_seq, seq);
}
if (!short_test && branch_do(n, &branch)) {
ASSERT_OK(db_impl->FlushWAL(true));
ASSERT_OK(ReOpenNoDelete());
db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
seq = db_impl->GetLatestSequenceNumber();
ASSERT_EQ(exp_seq, seq);
}
ASSERT_OK(ReOpen());
}
}
// Verify that the optimization would not compromize the correctness
TEST_P(TransactionTest, Optimizations) {
size_t comb_cnt = size_t(1) << 2; // 2 is number of optimization vars
for (size_t new_comb = 0; new_comb < comb_cnt; new_comb++) {
TransactionDBWriteOptimizations optimizations;
optimizations.skip_concurrency_control = IsInCombination(0, new_comb);
optimizations.skip_duplicate_key_check = IsInCombination(1, new_comb);
ASSERT_OK(ReOpen());
WriteOptions write_options;
WriteBatch batch;
batch.Put(Slice("k"), Slice("v1"));
ASSERT_OK(db->Write(write_options, &batch));
ReadOptions ropt;
PinnableSlice pinnable_val;
ASSERT_OK(db->Get(ropt, db->DefaultColumnFamily(), "k", &pinnable_val));
ASSERT_TRUE(pinnable_val == ("v1"));
}
}
// A comparator that uses only the first three bytes
class ThreeBytewiseComparator : public Comparator {
public:
ThreeBytewiseComparator() {}
const char* Name() const override { return "test.ThreeBytewiseComparator"; }
int Compare(const Slice& a, const Slice& b) const override {
Slice na = Slice(a.data(), a.size() < 3 ? a.size() : 3);
Slice nb = Slice(b.data(), b.size() < 3 ? b.size() : 3);
return na.compare(nb);
}
bool Equal(const Slice& a, const Slice& b) const override {
Slice na = Slice(a.data(), a.size() < 3 ? a.size() : 3);
Slice nb = Slice(b.data(), b.size() < 3 ? b.size() : 3);
return na == nb;
}
// This methods below dont seem relevant to this test. Implement them if
// proven othersize.
void FindShortestSeparator(std::string* start,
const Slice& limit) const override {
const Comparator* bytewise_comp = BytewiseComparator();
bytewise_comp->FindShortestSeparator(start, limit);
}
void FindShortSuccessor(std::string* key) const override {
const Comparator* bytewise_comp = BytewiseComparator();
bytewise_comp->FindShortSuccessor(key);
}
};
TEST_P(TransactionTest, GetWithoutSnapshot) {
WriteOptions write_options;
std::atomic<bool> finish = {false};
db->Put(write_options, "key", "value");
rocksdb::port::Thread commit_thread([&]() {
for (int i = 0; i < 100; i++) {
TransactionOptions txn_options;
Transaction* txn = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn->SetName("xid"));
ASSERT_OK(txn->Put("key", "overridedvalue"));
ASSERT_OK(txn->Put("key", "value"));
ASSERT_OK(txn->Prepare());
ASSERT_OK(txn->Commit());
delete txn;
}
finish = true;
});
rocksdb::port::Thread read_thread([&]() {
while (!finish) {
ReadOptions ropt;
PinnableSlice pinnable_val;
ASSERT_OK(db->Get(ropt, db->DefaultColumnFamily(), "key", &pinnable_val));
ASSERT_TRUE(pinnable_val == ("value"));
}
});
commit_thread.join();
read_thread.join();
}
// Test that the transactional db can handle duplicate keys in the write batch
TEST_P(TransactionTest, DuplicateKeys) {
ColumnFamilyOptions cf_options;
std::string cf_name = "two";
ColumnFamilyHandle* cf_handle = nullptr;
{
ASSERT_OK(db->CreateColumnFamily(cf_options, cf_name, &cf_handle));
WriteOptions write_options;
WriteBatch batch;
batch.Put(Slice("key"), Slice("value"));
batch.Put(Slice("key2"), Slice("value2"));
// duplicate the keys
batch.Put(Slice("key"), Slice("value3"));
// duplicate the 2nd key. It should not be counted duplicate since a
// sub-patch is cut after the last duplicate.
batch.Put(Slice("key2"), Slice("value4"));
// duplicate the keys but in a different cf. It should not be counted as
// duplicate keys
batch.Put(cf_handle, Slice("key"), Slice("value5"));
ASSERT_OK(db->Write(write_options, &batch));
ReadOptions ropt;
PinnableSlice pinnable_val;
auto s = db->Get(ropt, db->DefaultColumnFamily(), "key", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("value3"));
s = db->Get(ropt, db->DefaultColumnFamily(), "key2", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("value4"));
s = db->Get(ropt, cf_handle, "key", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("value5"));
delete cf_handle;
}
// Test with non-bytewise comparator
{
ASSERT_OK(ReOpen());
std::unique_ptr<const Comparator> comp_gc(new ThreeBytewiseComparator());
cf_options.comparator = comp_gc.get();
ASSERT_OK(db->CreateColumnFamily(cf_options, cf_name, &cf_handle));
WriteOptions write_options;
WriteBatch batch;
batch.Put(cf_handle, Slice("key"), Slice("value"));
// The first three bytes are the same, do it must be counted as duplicate
batch.Put(cf_handle, Slice("key2"), Slice("value2"));
// check for 2nd duplicate key in cf with non-default comparator
batch.Put(cf_handle, Slice("key2b"), Slice("value2b"));
ASSERT_OK(db->Write(write_options, &batch));
// The value must be the most recent value for all the keys equal to "key",
// including "key2"
ReadOptions ropt;
PinnableSlice pinnable_val;
ASSERT_OK(db->Get(ropt, cf_handle, "key", &pinnable_val));
ASSERT_TRUE(pinnable_val == ("value2b"));
// Test duplicate keys with rollback
TransactionOptions txn_options;
Transaction* txn0 = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn0->SetName("xid"));
ASSERT_OK(txn0->Put(cf_handle, Slice("key3"), Slice("value3")));
ASSERT_OK(txn0->Merge(cf_handle, Slice("key4"), Slice("value4")));
ASSERT_OK(txn0->Rollback());
ASSERT_OK(db->Get(ropt, cf_handle, "key5", &pinnable_val));
ASSERT_TRUE(pinnable_val == ("value2b"));
delete txn0;
delete cf_handle;
cf_options.comparator = BytewiseComparator();
}
for (bool do_prepare : {true, false}) {
for (bool do_rollback : {true, false}) {
for (bool with_commit_batch : {true, false}) {
if (with_commit_batch && !do_prepare) {
continue;
}
if (with_commit_batch && do_rollback) {
continue;
}
ASSERT_OK(ReOpen());
ASSERT_OK(db->CreateColumnFamily(cf_options, cf_name, &cf_handle));
TransactionOptions txn_options;
txn_options.use_only_the_last_commit_time_batch_for_recovery = false;
WriteOptions write_options;
Transaction* txn0 = db->BeginTransaction(write_options, txn_options);
auto s = txn0->SetName("xid");
ASSERT_OK(s);
s = txn0->Put(Slice("foo0"), Slice("bar0a"));
ASSERT_OK(s);
s = txn0->Put(Slice("foo0"), Slice("bar0b"));
ASSERT_OK(s);
s = txn0->Put(Slice("foo1"), Slice("bar1"));
ASSERT_OK(s);
s = txn0->Merge(Slice("foo2"), Slice("bar2a"));
ASSERT_OK(s);
// Repeat a key after the start of a sub-patch. This should not cause a
// duplicate in the most recent sub-patch and hence not creating a new
// sub-patch.
s = txn0->Put(Slice("foo0"), Slice("bar0c"));
ASSERT_OK(s);
s = txn0->Merge(Slice("foo2"), Slice("bar2b"));
ASSERT_OK(s);
// duplicate the keys but in a different cf. It should not be counted as
// duplicate.
s = txn0->Put(cf_handle, Slice("foo0"), Slice("bar0-cf1"));
ASSERT_OK(s);
s = txn0->Put(Slice("foo3"), Slice("bar3"));
ASSERT_OK(s);
s = txn0->Merge(Slice("foo3"), Slice("bar3"));
ASSERT_OK(s);
s = txn0->Put(Slice("foo4"), Slice("bar4"));
ASSERT_OK(s);
s = txn0->Delete(Slice("foo4"));
ASSERT_OK(s);
s = txn0->SingleDelete(Slice("foo4"));
ASSERT_OK(s);
if (do_prepare) {
s = txn0->Prepare();
ASSERT_OK(s);
}
if (do_rollback) {
// Test rolling back the batch with duplicates
s = txn0->Rollback();
ASSERT_OK(s);
} else {
if (with_commit_batch) {
assert(do_prepare);
auto cb = txn0->GetCommitTimeWriteBatch();
// duplicate a key in the original batch
// TODO(myabandeh): the behavior of GetCommitTimeWriteBatch
// conflicting with the prepared batch is currently undefined and
// gives different results in different implementations.
// s = cb->Put(Slice("foo0"), Slice("bar0d"));
// ASSERT_OK(s);
// add a new duplicate key
s = cb->Put(Slice("foo6"), Slice("bar6a"));
ASSERT_OK(s);
s = cb->Put(Slice("foo6"), Slice("bar6b"));
ASSERT_OK(s);
// add a duplicate key that is removed in the same batch
s = cb->Put(Slice("foo7"), Slice("bar7a"));
ASSERT_OK(s);
s = cb->Delete(Slice("foo7"));
ASSERT_OK(s);
}
s = txn0->Commit();
ASSERT_OK(s);
}
delete txn0;
ReadOptions ropt;
PinnableSlice pinnable_val;
if (do_rollback) {
s = db->Get(ropt, db->DefaultColumnFamily(), "foo0", &pinnable_val);
ASSERT_TRUE(s.IsNotFound());
s = db->Get(ropt, cf_handle, "foo0", &pinnable_val);
ASSERT_TRUE(s.IsNotFound());
s = db->Get(ropt, db->DefaultColumnFamily(), "foo1", &pinnable_val);
ASSERT_TRUE(s.IsNotFound());
s = db->Get(ropt, db->DefaultColumnFamily(), "foo2", &pinnable_val);
ASSERT_TRUE(s.IsNotFound());
s = db->Get(ropt, db->DefaultColumnFamily(), "foo3", &pinnable_val);
ASSERT_TRUE(s.IsNotFound());
s = db->Get(ropt, db->DefaultColumnFamily(), "foo4", &pinnable_val);
ASSERT_TRUE(s.IsNotFound());
} else {
s = db->Get(ropt, db->DefaultColumnFamily(), "foo0", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar0c"));
s = db->Get(ropt, cf_handle, "foo0", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar0-cf1"));
s = db->Get(ropt, db->DefaultColumnFamily(), "foo1", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar1"));
s = db->Get(ropt, db->DefaultColumnFamily(), "foo2", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar2a,bar2b"));
s = db->Get(ropt, db->DefaultColumnFamily(), "foo3", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar3,bar3"));
s = db->Get(ropt, db->DefaultColumnFamily(), "foo4", &pinnable_val);
ASSERT_TRUE(s.IsNotFound());
if (with_commit_batch) {
s = db->Get(ropt, db->DefaultColumnFamily(), "foo6", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar6b"));
s = db->Get(ropt, db->DefaultColumnFamily(), "foo7", &pinnable_val);
ASSERT_TRUE(s.IsNotFound());
}
}
delete cf_handle;
} // with_commit_batch
} // do_rollback
} // do_prepare
if (!options.unordered_write) {
// Also test with max_successive_merges > 0. max_successive_merges will not
// affect our algorithm for duplicate key insertion but we add the test to
// verify that.
cf_options.max_successive_merges = 2;
cf_options.merge_operator = MergeOperators::CreateStringAppendOperator();
ASSERT_OK(ReOpen());
db->CreateColumnFamily(cf_options, cf_name, &cf_handle);
WriteOptions write_options;
// Ensure one value for the key
ASSERT_OK(db->Put(write_options, cf_handle, Slice("key"), Slice("value")));
WriteBatch batch;
// Merge more than max_successive_merges times
batch.Merge(cf_handle, Slice("key"), Slice("1"));
batch.Merge(cf_handle, Slice("key"), Slice("2"));
batch.Merge(cf_handle, Slice("key"), Slice("3"));
batch.Merge(cf_handle, Slice("key"), Slice("4"));
ASSERT_OK(db->Write(write_options, &batch));
ReadOptions read_options;
string value;
ASSERT_OK(db->Get(read_options, cf_handle, "key", &value));
ASSERT_EQ(value, "value,1,2,3,4");
delete cf_handle;
}
{
// Test that the duplicate detection is not compromised after rolling back
// to a save point
TransactionOptions txn_options;
WriteOptions write_options;
Transaction* txn0 = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn0->Put(Slice("foo0"), Slice("bar0a")));
ASSERT_OK(txn0->Put(Slice("foo0"), Slice("bar0b")));
txn0->SetSavePoint();
ASSERT_OK(txn0->RollbackToSavePoint());
ASSERT_OK(txn0->Commit());
delete txn0;
}
// Test sucessfull recovery after a crash
{
ASSERT_OK(ReOpen());
TransactionOptions txn_options;
WriteOptions write_options;
ReadOptions ropt;
Transaction* txn0;
PinnableSlice pinnable_val;
Status s;
std::unique_ptr<const Comparator> comp_gc(new ThreeBytewiseComparator());
cf_options.comparator = comp_gc.get();
cf_options.merge_operator = MergeOperators::CreateStringAppendOperator();
ASSERT_OK(db->CreateColumnFamily(cf_options, cf_name, &cf_handle));
delete cf_handle;
std::vector<ColumnFamilyDescriptor> cfds{
ColumnFamilyDescriptor(kDefaultColumnFamilyName,
ColumnFamilyOptions(options)),
ColumnFamilyDescriptor(cf_name, cf_options),
};
std::vector<ColumnFamilyHandle*> handles;
ASSERT_OK(ReOpenNoDelete(cfds, &handles));
ASSERT_OK(db->Put(write_options, "foo0", "init"));
ASSERT_OK(db->Put(write_options, "foo1", "init"));
ASSERT_OK(db->Put(write_options, handles[1], "foo0", "init"));
ASSERT_OK(db->Put(write_options, handles[1], "foo1", "init"));
// one entry
txn0 = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn0->SetName("xid"));
ASSERT_OK(txn0->Put(Slice("foo0"), Slice("bar0a")));
ASSERT_OK(txn0->Prepare());
delete txn0;
// This will check the asserts inside recovery code
ASSERT_OK(db->FlushWAL(true));
reinterpret_cast<PessimisticTransactionDB*>(db)->TEST_Crash();
ASSERT_OK(ReOpenNoDelete(cfds, &handles));
txn0 = db->GetTransactionByName("xid");
ASSERT_TRUE(txn0 != nullptr);
ASSERT_OK(txn0->Commit());
delete txn0;
s = db->Get(ropt, db->DefaultColumnFamily(), "foo0", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar0a"));
// two entries, no duplicate
txn0 = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn0->SetName("xid"));
ASSERT_OK(txn0->Put(handles[1], Slice("foo0"), Slice("bar0b")));
ASSERT_OK(txn0->Put(handles[1], Slice("fol1"), Slice("bar1b")));
ASSERT_OK(txn0->Put(Slice("foo0"), Slice("bar0b")));
ASSERT_OK(txn0->Put(Slice("foo1"), Slice("bar1b")));
ASSERT_OK(txn0->Prepare());
delete txn0;
// This will check the asserts inside recovery code
db->FlushWAL(true);
// Flush only cf 1
reinterpret_cast<DBImpl*>(db->GetRootDB())
->TEST_FlushMemTable(true, false, handles[1]);
reinterpret_cast<PessimisticTransactionDB*>(db)->TEST_Crash();
ASSERT_OK(ReOpenNoDelete(cfds, &handles));
txn0 = db->GetTransactionByName("xid");
ASSERT_TRUE(txn0 != nullptr);
ASSERT_OK(txn0->Commit());
delete txn0;
pinnable_val.Reset();
s = db->Get(ropt, db->DefaultColumnFamily(), "foo0", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar0b"));
pinnable_val.Reset();
s = db->Get(ropt, db->DefaultColumnFamily(), "foo1", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar1b"));
pinnable_val.Reset();
s = db->Get(ropt, handles[1], "foo0", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar0b"));
pinnable_val.Reset();
s = db->Get(ropt, handles[1], "fol1", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar1b"));
// one duplicate with ::Put
txn0 = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn0->SetName("xid"));
ASSERT_OK(txn0->Put(handles[1], Slice("key-nonkey0"), Slice("bar0c")));
ASSERT_OK(txn0->Put(handles[1], Slice("key-nonkey1"), Slice("bar1d")));
ASSERT_OK(txn0->Put(Slice("foo0"), Slice("bar0c")));
ASSERT_OK(txn0->Put(Slice("foo1"), Slice("bar1c")));
ASSERT_OK(txn0->Put(Slice("foo0"), Slice("bar0d")));
ASSERT_OK(txn0->Prepare());
delete txn0;
// This will check the asserts inside recovery code
ASSERT_OK(db->FlushWAL(true));
// Flush only cf 1
reinterpret_cast<DBImpl*>(db->GetRootDB())
->TEST_FlushMemTable(true, false, handles[1]);
reinterpret_cast<PessimisticTransactionDB*>(db)->TEST_Crash();
ASSERT_OK(ReOpenNoDelete(cfds, &handles));
txn0 = db->GetTransactionByName("xid");
ASSERT_TRUE(txn0 != nullptr);
ASSERT_OK(txn0->Commit());
delete txn0;
pinnable_val.Reset();
s = db->Get(ropt, db->DefaultColumnFamily(), "foo0", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar0d"));
pinnable_val.Reset();
s = db->Get(ropt, db->DefaultColumnFamily(), "foo1", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar1c"));
pinnable_val.Reset();
s = db->Get(ropt, handles[1], "key-nonkey2", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar1d"));
// Duplicate with ::Put, ::Delete
txn0 = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn0->SetName("xid"));
ASSERT_OK(txn0->Put(handles[1], Slice("key-nonkey0"), Slice("bar0e")));
ASSERT_OK(txn0->Delete(handles[1], Slice("key-nonkey1")));
ASSERT_OK(txn0->Put(Slice("foo0"), Slice("bar0e")));
ASSERT_OK(txn0->Delete(Slice("foo0")));
ASSERT_OK(txn0->Prepare());
delete txn0;
// This will check the asserts inside recovery code
ASSERT_OK(db->FlushWAL(true));
// Flush only cf 1
reinterpret_cast<DBImpl*>(db->GetRootDB())
->TEST_FlushMemTable(true, false, handles[1]);
reinterpret_cast<PessimisticTransactionDB*>(db)->TEST_Crash();
ASSERT_OK(ReOpenNoDelete(cfds, &handles));
txn0 = db->GetTransactionByName("xid");
ASSERT_TRUE(txn0 != nullptr);
ASSERT_OK(txn0->Commit());
delete txn0;
pinnable_val.Reset();
s = db->Get(ropt, db->DefaultColumnFamily(), "foo0", &pinnable_val);
ASSERT_TRUE(s.IsNotFound());
pinnable_val.Reset();
s = db->Get(ropt, handles[1], "key-nonkey2", &pinnable_val);
ASSERT_TRUE(s.IsNotFound());
// Duplicate with ::Put, ::SingleDelete
txn0 = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn0->SetName("xid"));
ASSERT_OK(txn0->Put(handles[1], Slice("key-nonkey0"), Slice("bar0g")));
ASSERT_OK(txn0->SingleDelete(handles[1], Slice("key-nonkey1")));
ASSERT_OK(txn0->Put(Slice("foo0"), Slice("bar0e")));
ASSERT_OK(txn0->SingleDelete(Slice("foo0")));
ASSERT_OK(txn0->Prepare());
delete txn0;
// This will check the asserts inside recovery code
ASSERT_OK(db->FlushWAL(true));
// Flush only cf 1
reinterpret_cast<DBImpl*>(db->GetRootDB())
->TEST_FlushMemTable(true, false, handles[1]);
reinterpret_cast<PessimisticTransactionDB*>(db)->TEST_Crash();
ASSERT_OK(ReOpenNoDelete(cfds, &handles));
txn0 = db->GetTransactionByName("xid");
ASSERT_TRUE(txn0 != nullptr);
ASSERT_OK(txn0->Commit());
delete txn0;
pinnable_val.Reset();
s = db->Get(ropt, db->DefaultColumnFamily(), "foo0", &pinnable_val);
ASSERT_TRUE(s.IsNotFound());
pinnable_val.Reset();
s = db->Get(ropt, handles[1], "key-nonkey2", &pinnable_val);
ASSERT_TRUE(s.IsNotFound());
// Duplicate with ::Put, ::Merge
txn0 = db->BeginTransaction(write_options, txn_options);
ASSERT_OK(txn0->SetName("xid"));
ASSERT_OK(txn0->Put(handles[1], Slice("key-nonkey0"), Slice("bar1i")));
ASSERT_OK(txn0->Merge(handles[1], Slice("key-nonkey1"), Slice("bar1j")));
ASSERT_OK(txn0->Put(Slice("foo0"), Slice("bar0f")));
ASSERT_OK(txn0->Merge(Slice("foo0"), Slice("bar0g")));
ASSERT_OK(txn0->Prepare());
delete txn0;
// This will check the asserts inside recovery code
ASSERT_OK(db->FlushWAL(true));
// Flush only cf 1
reinterpret_cast<DBImpl*>(db->GetRootDB())
->TEST_FlushMemTable(true, false, handles[1]);
reinterpret_cast<PessimisticTransactionDB*>(db)->TEST_Crash();
ASSERT_OK(ReOpenNoDelete(cfds, &handles));
txn0 = db->GetTransactionByName("xid");
ASSERT_TRUE(txn0 != nullptr);
ASSERT_OK(txn0->Commit());
delete txn0;
pinnable_val.Reset();
s = db->Get(ropt, db->DefaultColumnFamily(), "foo0", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar0f,bar0g"));
pinnable_val.Reset();
s = db->Get(ropt, handles[1], "key-nonkey2", &pinnable_val);
ASSERT_OK(s);
ASSERT_TRUE(pinnable_val == ("bar1i,bar1j"));
for (auto h : handles) {
delete h;
}
delete db;
db = nullptr;
}
}
} // namespace rocksdb
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
#else
#include <stdio.h>
int main(int /*argc*/, char** /*argv*/) {
fprintf(stderr,
"SKIPPED as Transactions are not supported in ROCKSDB_LITE\n");
return 0;
}
#endif // ROCKSDB_LITE
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