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rocksdb/utilities/transactions/transaction_test.cc
Maysam Yabandeh 60beefd6e0 WritePrepared Txn: Advance seq one per batch 
Summary:
By default the seq number in DB is increased once per written key. WritePrepared txns requires the seq to be increased once per the entire batch so that the seq would be used as the prepare timestamp by which the transaction is identified. Also we need to increase seq for the commit marker since it would give a unique id to the commit timestamp of transactions.

Two unit tests are added to verify our understanding of how the seq should be increased. The recovery path requires much more work and is left to another patch.
Closes https://github.com/facebook/rocksdb/pull/2885

Differential Revision: D5837843

Pulled By: maysamyabandeh

fbshipit-source-id: a08960b93d727e1cf438c254d0c2636fb133cc1c
2017-09-18 14:45:08 -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/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 {
// TODO(myabandeh): Instantiate the tests with other write policies
INSTANTIATE_TEST_CASE_P(DBAsBaseDB, TransactionTest,
::testing::Values(std::make_tuple(false, false,
WRITE_COMMITTED)));
INSTANTIATE_TEST_CASE_P(StackableDBAsBaseDB, TransactionTest,
::testing::Values(std::make_tuple(true, false,
WRITE_COMMITTED)));
INSTANTIATE_TEST_CASE_P(
MySQLStyleTransactionTest, MySQLStyleTransactionTest,
::testing::Values(std::make_tuple(false, false, WRITE_COMMITTED),
std::make_tuple(false, true, WRITE_COMMITTED),
std::make_tuple(true, false, WRITE_COMMITTED),
std::make_tuple(true, true, WRITE_COMMITTED)));
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));
}
TEST_P(TransactionTest, SuccessTest) {
ASSERT_OK(db->ResetStats());
WriteOptions write_options;
ReadOptions read_options;
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, TransactionOptions());
ASSERT_TRUE(txn);
ASSERT_EQ(0, txn->GetNumPuts());
ASSERT_LE(0, txn->GetID());
s = txn->GetForUpdate(read_options, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar");
s = txn->Put(Slice("foo"), Slice("bar2"));
ASSERT_OK(s);
ASSERT_EQ(1, txn->GetNumPuts());
s = txn->GetForUpdate(read_options, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar2");
s = txn->Commit();
ASSERT_OK(s);
s = db->Get(read_options, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar2");
delete txn;
}
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);
});
// lock key in default cf
s = txn1->GetForUpdate(read_options, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar");
// lock key in cfa
s = txn1->GetForUpdate(read_options, cfa, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar");
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");
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);
txn1->Rollback();
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 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();
}
}
TEST_P(TransactionTest, 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);
// 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(TransactionTest, 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();
}
}
TEST_P(TransactionTest, CommitTimeBatchFailTest) {
WriteOptions write_options;
TransactionOptions txn_options;
string value;
Status s;
Transaction* txn1 = db->BeginTransaction(write_options, txn_options);
ASSERT_TRUE(txn1);
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, SimpleTwoPhaseTransactionTest) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
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");
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 prpared 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);
// but now our memtable should be referencing the prep section
ASSERT_EQ(log_containing_prep,
db_impl->TEST_FindMinPrepLogReferencedByMemTable());
db_impl->TEST_FlushMemTable(true);
// after memtable flush we can now relese the log
ASSERT_EQ(0, db_impl->TEST_FindMinPrepLogReferencedByMemTable());
delete txn;
}
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());
delete txn1;
delete txn2;
}
TEST_P(TransactionTest, TwoPhaseEmptyWriteTest) {
Status s;
std::string value;
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
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);
s = db->Get(read_options, "foo", &value);
ASSERT_OK(s);
ASSERT_EQ(value, "bar");
delete txn2;
}
TEST_P(TransactionTest, 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;
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;
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
s = ReOpenNoDelete();
ASSERT_OK(s);
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 prpared 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);
// but now our memtable should be referencing the prep section
ASSERT_EQ(log_containing_prep,
db_impl->TEST_FindMinPrepLogReferencedByMemTable());
db_impl->TEST_FlushMemTable(true);
// after memtable flush we can now relese the log
ASSERT_EQ(0, db_impl->TEST_FindMinPrepLogReferencedByMemTable());
delete txn;
// deleting transaction should unregister transaction
ASSERT_EQ(db->GetTransactionByName("xid"), nullptr);
}
// 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' + 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, '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' + t));
for (int i = 0; i < 10; i++) {
std::string key(name + "_" + std::string(1, 'A' + i));
s = db->Get(read_options, key, &value);
ASSERT_OK(s);
ASSERT_EQ(value, "val");
}
}
}
TEST_P(TransactionTest, 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');
s = db->Put(write_options, key, val);
ASSERT_OK(s);
if (i % 29 == 0) {
// crash
env->SetFilesystemActive(false);
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();
// 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);
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();
// 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;
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());
// we should see txn1s log refernced by the memtables
ASSERT_EQ(db_impl->TEST_FindMinPrepLogReferencedByMemTable(),
txn1->GetLogNumber());
// 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);
// should show the first txn log
ASSERT_EQ(db_impl->TEST_FindMinPrepLogReferencedByMemTable(),
txn1->GetLogNumber());
// flush only cfa memtable
s = db_impl->TEST_FlushMemTable(true, cfa);
ASSERT_OK(s);
// should show the first txn log
ASSERT_EQ(db_impl->TEST_FindMinPrepLogReferencedByMemTable(),
txn2->GetLogNumber());
// flush only cfb memtable
s = db_impl->TEST_FlushMemTable(true, 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);
ASSERT_GT(cfh_a->cfd()->GetLogNumber(), prepare_log_no);
ASSERT_EQ(cfh_a->cfd()->GetLogNumber(), db_impl->TEST_LogfileNumber());
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);
ASSERT_EQ(db_impl->TEST_FindMinPrepLogReferencedByMemTable(), prepare_log_no);
ASSERT_TRUE(!db_impl->TEST_UnableToFlushOldestLog());
// request a flush for all column families such that the earliest
// alive log file can be killed
db_impl->TEST_HandleWALFull();
// log cannot be flushed because txn2 has not been commited
ASSERT_TRUE(!db_impl->TEST_IsLogGettingFlushed());
ASSERT_TRUE(db_impl->TEST_UnableToFlushOldestLog());
// assert that cfa has a flush requested
ASSERT_TRUE(cfh_a->cfd()->imm()->HasFlushRequested());
// cfb should not be flushed becuse it has no data from LOG A
ASSERT_TRUE(!cfh_b->cfd()->imm()->HasFlushRequested());
// cfb now has data from LOG A
s = txn2->Commit();
ASSERT_OK(s);
db_impl->TEST_HandleWALFull();
ASSERT_TRUE(!db_impl->TEST_UnableToFlushOldestLog());
// 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);
ReOpenNoDelete();
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;
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;
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;
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;
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);
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;
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;
string value;
Status s;
db->Put(write_options, "AAA", "bar");
db->Put(write_options, "BBB", "bar");
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
txn->GetForUpdate(read_options, "AAA", &value);
ASSERT_EQ(value, "bar1");
s = txn->Put("AAA", "bar2");
ASSERT_OK(s);
// Modify BBB before snapshot is taken
db->Put(write_options, "BBB", "bar1");
txn->SetSnapshot();
snapshot_read_options.snapshot = txn->GetSnapshot();
// Read and write with snapshot
txn->GetForUpdate(snapshot_read_options, "BBB", &value);
ASSERT_EQ(value, "bar1");
s = txn->Put("BBB", "bar2");
ASSERT_OK(s);
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, ColumnFamiliesTest2) {
WriteOptions write_options;
ReadOptions read_options, snapshot_read_options;
TransactionOptions txn_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;
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;
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;
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;
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);
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);
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;
TransactionOptions txn_options;
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;
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;
TransactionOptions txn_options;
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, UndoGetForUpdateTest) {
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
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;
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;
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;
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;
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;
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;
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;
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;
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) {
*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;
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;
TransactionOptions txn_options;
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(TransactionTest, 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();
}
namespace {
Status TransactionStressTestInserter(TransactionDB* db,
const size_t num_transactions,
const size_t num_sets,
const size_t num_keys_per_set) {
size_t seed = std::hash<std::thread::id>()(std::this_thread::get_id());
Random64 _rand(seed);
WriteOptions write_options;
ReadOptions read_options;
TransactionOptions txn_options;
txn_options.set_snapshot = true;
RandomTransactionInserter inserter(&_rand, write_options, read_options,
num_keys_per_set,
static_cast<uint16_t>(num_sets));
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 (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
TEST_P(MySQLStyleTransactionTest, TransactionStressTest) {
const size_t num_threads = 4;
const size_t num_transactions_per_thread = 10000;
const size_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::function<void()> call_inserter = [&] {
ASSERT_OK(TransactionStressTestInserter(db, num_transactions_per_thread,
num_sets, num_keys_per_set));
};
// Create N threads that use RandomTransactionInserter to write
// many transactions.
for (uint32_t i = 0; i < num_threads; i++) {
threads.emplace_back(call_inserter);
}
// Wait for all threads to run
for (auto& t : threads) {
t.join();
}
// Verify that data is consistent
Status s = RandomTransactionInserter::Verify(db, num_sets);
ASSERT_OK(s);
}
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;
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("...."));
ASSERT_TRUE(s.IsMemoryLimit());
ASSERT_EQ(2, txn->GetNumPuts());
txn->Rollback();
delete txn;
}
// This test clarfies 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(TransactionTest, SeqAdvanceTest) {
auto pdb = reinterpret_cast<PessimisticTransactionDB*>(db);
DBImpl* db_impl = reinterpret_cast<DBImpl*>(db->GetRootDB());
auto seq = db_impl->GetLatestSequenceNumber();
auto exp_seq = seq;
// Test DB's internal txn. It involves no prepare phase nor a commit marker.
WriteOptions wopts;
auto s = db->Put(wopts, "key", "value");
// Consume one seq per key
exp_seq++;
ASSERT_OK(s);
seq = db_impl->GetLatestSequenceNumber();
ASSERT_EQ(exp_seq, seq);
// Doing it twice might detect some bugs
s = db->Put(wopts, "key", "value");
exp_seq++;
ASSERT_OK(s);
seq = db_impl->GetLatestSequenceNumber();
ASSERT_EQ(exp_seq, seq);
// Testing directly writing a write batch. Functionality-wise it is equivalent
// to commit without prepare.
WriteBatch wb;
wb.Put("k1", "v1");
wb.Put("k2", "v2");
wb.Put("k3", "v3");
s = db->Write(wopts, &wb);
// One seq per key.
exp_seq += 3;
ASSERT_OK(s);
seq = db_impl->GetLatestSequenceNumber();
ASSERT_EQ(exp_seq, seq);
// A full 2pc txn that also involves a commit marker.
TransactionOptions txn_options;
WriteOptions write_options;
Transaction* txn = db->BeginTransaction(write_options, txn_options);
s = txn->SetName("xid");
ASSERT_OK(s);
s = txn->Put(Slice("foo"), Slice("bar"));
s = txn->Put(Slice("foo2"), Slice("bar2"));
s = txn->Put(Slice("foo3"), Slice("bar3"));
s = txn->Put(Slice("foo4"), Slice("bar4"));
s = txn->Put(Slice("foo5"), Slice("bar5"));
ASSERT_OK(s);
s = txn->Prepare();
ASSERT_OK(s);
// Consume one seq per key
exp_seq += 5;
s = txn->Commit();
ASSERT_OK(s);
s = db->Put(wopts, "key", "value");
exp_seq++;
ASSERT_OK(s);
seq = db_impl->GetLatestSequenceNumber();
ASSERT_EQ(exp_seq, seq);
// Commit without prepare. It shoudl write to DB without a commit marker.
txn = db->BeginTransaction(write_options, txn_options);
s = txn->SetName("xid2");
ASSERT_OK(s);
s = txn->Put(Slice("foo"), Slice("bar"));
s = txn->Put(Slice("foo2"), Slice("bar2"));
s = txn->Put(Slice("foo3"), Slice("bar3"));
s = txn->Put(Slice("foo4"), Slice("bar4"));
s = txn->Put(Slice("foo5"), Slice("bar5"));
ASSERT_OK(s);
s = txn->Commit();
ASSERT_OK(s);
// One seq per key
exp_seq += 5;
seq = db_impl->GetLatestSequenceNumber();
ASSERT_EQ(exp_seq, seq);
pdb->UnregisterTransaction(txn);
delete txn;
}
} // 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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