2f41ecfe75
Summary: MyRocks currently sets `max_write_buffer_number_to_maintain` in order to maintain enough history for transaction conflict checking. The effectiveness of this approach depends on the size of memtables. When memtables are small, it may not keep enough history; when memtables are large, this may consume too much memory. We are proposing a new way to configure memtable list history: by limiting the memory usage of immutable memtables. The new option is `max_write_buffer_size_to_maintain` and it will take precedence over the old `max_write_buffer_number_to_maintain` if they are both set to non-zero values. The new option accounts for the total memory usage of flushed immutable memtables and mutable memtable. When the total usage exceeds the limit, RocksDB may start dropping immutable memtables (which is also called trimming history), starting from the oldest one. The semantics of the old option actually works both as an upper bound and lower bound. History trimming will start if number of immutable memtables exceeds the limit, but it will never go below (limit-1) due to history trimming. In order the mimic the behavior with the new option, history trimming will stop if dropping the next immutable memtable causes the total memory usage go below the size limit. For example, assuming the size limit is set to 64MB, and there are 3 immutable memtables with sizes of 20, 30, 30. Although the total memory usage is 80MB > 64MB, dropping the oldest memtable will reduce the memory usage to 60MB < 64MB, so in this case no memtable will be dropped. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5022 Differential Revision: D14394062 Pulled By: miasantreble fbshipit-source-id: 60457a509c6af89d0993f988c9b5c2aa9e45f5c5
1518 lines
39 KiB
C++
1518 lines
39 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#ifndef ROCKSDB_LITE
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#include <functional>
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#include <string>
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#include <thread>
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#include "db/db_impl/db_impl.h"
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#include "logging/logging.h"
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#include "port/port.h"
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#include "rocksdb/db.h"
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#include "rocksdb/perf_context.h"
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#include "rocksdb/utilities/optimistic_transaction_db.h"
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#include "rocksdb/utilities/transaction.h"
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#include "test_util/sync_point.h"
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#include "test_util/testharness.h"
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#include "test_util/transaction_test_util.h"
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#include "util/crc32c.h"
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#include "util/random.h"
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using std::string;
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namespace rocksdb {
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class OptimisticTransactionTest : public testing::Test {
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public:
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OptimisticTransactionDB* txn_db;
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string dbname;
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Options options;
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OptimisticTransactionTest() {
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options.create_if_missing = true;
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options.max_write_buffer_number = 2;
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options.max_write_buffer_size_to_maintain = 1600;
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dbname = test::PerThreadDBPath("optimistic_transaction_testdb");
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DestroyDB(dbname, options);
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Open();
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}
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~OptimisticTransactionTest() override {
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delete txn_db;
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DestroyDB(dbname, options);
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}
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void Reopen() {
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delete txn_db;
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txn_db = nullptr;
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Open();
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}
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private:
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void Open() {
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Status s = OptimisticTransactionDB::Open(options, dbname, &txn_db);
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assert(s.ok());
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assert(txn_db != nullptr);
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}
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};
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TEST_F(OptimisticTransactionTest, SuccessTest) {
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WriteOptions write_options;
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ReadOptions read_options;
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string value;
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Status s;
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txn_db->Put(write_options, Slice("foo"), Slice("bar"));
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txn_db->Put(write_options, Slice("foo2"), Slice("bar"));
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Transaction* txn = txn_db->BeginTransaction(write_options);
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ASSERT_TRUE(txn);
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txn->GetForUpdate(read_options, "foo", &value);
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ASSERT_EQ(value, "bar");
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txn->Put(Slice("foo"), Slice("bar2"));
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txn->GetForUpdate(read_options, "foo", &value);
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ASSERT_EQ(value, "bar2");
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s = txn->Commit();
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ASSERT_OK(s);
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txn_db->Get(read_options, "foo", &value);
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ASSERT_EQ(value, "bar2");
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delete txn;
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}
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TEST_F(OptimisticTransactionTest, WriteConflictTest) {
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WriteOptions write_options;
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ReadOptions read_options;
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string value;
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Status s;
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txn_db->Put(write_options, "foo", "bar");
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txn_db->Put(write_options, "foo2", "bar");
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Transaction* txn = txn_db->BeginTransaction(write_options);
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ASSERT_TRUE(txn);
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txn->Put("foo", "bar2");
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// This Put outside of a transaction will conflict with the previous write
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s = txn_db->Put(write_options, "foo", "barz");
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ASSERT_OK(s);
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s = txn_db->Get(read_options, "foo", &value);
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ASSERT_EQ(value, "barz");
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ASSERT_EQ(1, txn->GetNumKeys());
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s = txn->Commit();
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ASSERT_TRUE(s.IsBusy()); // Txn should not commit
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// Verify that transaction did not write anything
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txn_db->Get(read_options, "foo", &value);
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ASSERT_EQ(value, "barz");
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txn_db->Get(read_options, "foo2", &value);
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ASSERT_EQ(value, "bar");
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delete txn;
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}
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TEST_F(OptimisticTransactionTest, WriteConflictTest2) {
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WriteOptions write_options;
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ReadOptions read_options;
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OptimisticTransactionOptions txn_options;
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string value;
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Status s;
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txn_db->Put(write_options, "foo", "bar");
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txn_db->Put(write_options, "foo2", "bar");
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txn_options.set_snapshot = true;
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Transaction* txn = txn_db->BeginTransaction(write_options, txn_options);
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ASSERT_TRUE(txn);
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// This Put outside of a transaction will conflict with a later write
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s = txn_db->Put(write_options, "foo", "barz");
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ASSERT_OK(s);
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txn->Put("foo", "bar2"); // Conflicts with write done after snapshot taken
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s = txn_db->Get(read_options, "foo", &value);
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ASSERT_EQ(value, "barz");
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s = txn->Commit();
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ASSERT_TRUE(s.IsBusy()); // Txn should not commit
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// Verify that transaction did not write anything
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txn_db->Get(read_options, "foo", &value);
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ASSERT_EQ(value, "barz");
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txn_db->Get(read_options, "foo2", &value);
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ASSERT_EQ(value, "bar");
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delete txn;
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}
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TEST_F(OptimisticTransactionTest, ReadConflictTest) {
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WriteOptions write_options;
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ReadOptions read_options, snapshot_read_options;
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OptimisticTransactionOptions txn_options;
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string value;
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Status s;
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txn_db->Put(write_options, "foo", "bar");
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txn_db->Put(write_options, "foo2", "bar");
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txn_options.set_snapshot = true;
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Transaction* txn = txn_db->BeginTransaction(write_options, txn_options);
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ASSERT_TRUE(txn);
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txn->SetSnapshot();
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snapshot_read_options.snapshot = txn->GetSnapshot();
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txn->GetForUpdate(snapshot_read_options, "foo", &value);
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ASSERT_EQ(value, "bar");
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// This Put outside of a transaction will conflict with the previous read
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s = txn_db->Put(write_options, "foo", "barz");
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ASSERT_OK(s);
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s = txn_db->Get(read_options, "foo", &value);
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ASSERT_EQ(value, "barz");
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s = txn->Commit();
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ASSERT_TRUE(s.IsBusy()); // Txn should not commit
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// Verify that transaction did not write anything
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txn->GetForUpdate(read_options, "foo", &value);
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ASSERT_EQ(value, "barz");
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txn->GetForUpdate(read_options, "foo2", &value);
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ASSERT_EQ(value, "bar");
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delete txn;
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}
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TEST_F(OptimisticTransactionTest, TxnOnlyTest) {
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// Test to make sure transactions work when there are no other writes in an
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// empty db.
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WriteOptions write_options;
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ReadOptions read_options;
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string value;
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Status s;
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Transaction* txn = txn_db->BeginTransaction(write_options);
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ASSERT_TRUE(txn);
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txn->Put("x", "y");
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s = txn->Commit();
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ASSERT_OK(s);
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delete txn;
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}
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TEST_F(OptimisticTransactionTest, FlushTest) {
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WriteOptions write_options;
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ReadOptions read_options, snapshot_read_options;
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string value;
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Status s;
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txn_db->Put(write_options, Slice("foo"), Slice("bar"));
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txn_db->Put(write_options, Slice("foo2"), Slice("bar"));
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Transaction* txn = txn_db->BeginTransaction(write_options);
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ASSERT_TRUE(txn);
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snapshot_read_options.snapshot = txn->GetSnapshot();
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txn->GetForUpdate(snapshot_read_options, "foo", &value);
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ASSERT_EQ(value, "bar");
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txn->Put(Slice("foo"), Slice("bar2"));
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txn->GetForUpdate(snapshot_read_options, "foo", &value);
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ASSERT_EQ(value, "bar2");
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// Put a random key so we have a memtable to flush
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s = txn_db->Put(write_options, "dummy", "dummy");
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ASSERT_OK(s);
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// force a memtable flush
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FlushOptions flush_ops;
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txn_db->Flush(flush_ops);
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s = txn->Commit();
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// txn should commit since the flushed table is still in MemtableList History
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ASSERT_OK(s);
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txn_db->Get(read_options, "foo", &value);
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ASSERT_EQ(value, "bar2");
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delete txn;
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}
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TEST_F(OptimisticTransactionTest, FlushTest2) {
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WriteOptions write_options;
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ReadOptions read_options, snapshot_read_options;
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string value;
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Status s;
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txn_db->Put(write_options, Slice("foo"), Slice("bar"));
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txn_db->Put(write_options, Slice("foo2"), Slice("bar"));
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Transaction* txn = txn_db->BeginTransaction(write_options);
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ASSERT_TRUE(txn);
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snapshot_read_options.snapshot = txn->GetSnapshot();
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txn->GetForUpdate(snapshot_read_options, "foo", &value);
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ASSERT_EQ(value, "bar");
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txn->Put(Slice("foo"), Slice("bar2"));
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txn->GetForUpdate(snapshot_read_options, "foo", &value);
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ASSERT_EQ(value, "bar2");
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// Put a random key so we have a MemTable to flush
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s = txn_db->Put(write_options, "dummy", "dummy");
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ASSERT_OK(s);
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// force a memtable flush
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FlushOptions flush_ops;
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txn_db->Flush(flush_ops);
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// Put a random key so we have a MemTable to flush
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s = txn_db->Put(write_options, "dummy", "dummy2");
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ASSERT_OK(s);
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// force a memtable flush
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txn_db->Flush(flush_ops);
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s = txn_db->Put(write_options, "dummy", "dummy3");
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ASSERT_OK(s);
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// force a memtable flush
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// Since our test db has max_write_buffer_number=2, this flush will cause
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// the first memtable to get purged from the MemtableList history.
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txn_db->Flush(flush_ops);
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s = txn->Commit();
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// txn should not commit since MemTableList History is not large enough
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ASSERT_TRUE(s.IsTryAgain());
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txn_db->Get(read_options, "foo", &value);
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ASSERT_EQ(value, "bar");
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delete txn;
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}
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// Trigger the condition where some old memtables are skipped when doing
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// TransactionUtil::CheckKey(), and make sure the result is still correct.
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TEST_F(OptimisticTransactionTest, CheckKeySkipOldMemtable) {
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const int kAttemptHistoryMemtable = 0;
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const int kAttemptImmMemTable = 1;
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for (int attempt = kAttemptHistoryMemtable; attempt <= kAttemptImmMemTable;
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attempt++) {
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options.max_write_buffer_number_to_maintain = 3;
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Reopen();
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WriteOptions write_options;
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ReadOptions read_options;
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ReadOptions snapshot_read_options;
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ReadOptions snapshot_read_options2;
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string value;
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Status s;
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ASSERT_OK(txn_db->Put(write_options, Slice("foo"), Slice("bar")));
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ASSERT_OK(txn_db->Put(write_options, Slice("foo2"), Slice("bar")));
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Transaction* txn = txn_db->BeginTransaction(write_options);
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ASSERT_TRUE(txn != nullptr);
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Transaction* txn2 = txn_db->BeginTransaction(write_options);
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ASSERT_TRUE(txn2 != nullptr);
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snapshot_read_options.snapshot = txn->GetSnapshot();
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ASSERT_OK(txn->GetForUpdate(snapshot_read_options, "foo", &value));
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ASSERT_EQ(value, "bar");
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ASSERT_OK(txn->Put(Slice("foo"), Slice("bar2")));
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snapshot_read_options2.snapshot = txn2->GetSnapshot();
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ASSERT_OK(txn2->GetForUpdate(snapshot_read_options2, "foo2", &value));
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ASSERT_EQ(value, "bar");
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ASSERT_OK(txn2->Put(Slice("foo2"), Slice("bar2")));
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// txn updates "foo" and txn2 updates "foo2", and now a write is
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// issued for "foo", which conflicts with txn but not txn2
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ASSERT_OK(txn_db->Put(write_options, "foo", "bar"));
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if (attempt == kAttemptImmMemTable) {
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// For the second attempt, hold flush from beginning. The memtable
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// will be switched to immutable after calling TEST_SwitchMemtable()
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// while CheckKey() is called.
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rocksdb::SyncPoint::GetInstance()->LoadDependency(
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{{"OptimisticTransactionTest.CheckKeySkipOldMemtable",
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"FlushJob::Start"}});
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rocksdb::SyncPoint::GetInstance()->EnableProcessing();
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}
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// force a memtable flush. The memtable should still be kept
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FlushOptions flush_ops;
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if (attempt == kAttemptHistoryMemtable) {
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ASSERT_OK(txn_db->Flush(flush_ops));
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} else {
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assert(attempt == kAttemptImmMemTable);
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DBImpl* db_impl = static_cast<DBImpl*>(txn_db->GetRootDB());
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db_impl->TEST_SwitchMemtable();
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}
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uint64_t num_imm_mems;
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ASSERT_TRUE(txn_db->GetIntProperty(DB::Properties::kNumImmutableMemTable,
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&num_imm_mems));
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if (attempt == kAttemptHistoryMemtable) {
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ASSERT_EQ(0, num_imm_mems);
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} else {
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assert(attempt == kAttemptImmMemTable);
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ASSERT_EQ(1, num_imm_mems);
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}
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// Put something in active memtable
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ASSERT_OK(txn_db->Put(write_options, Slice("foo3"), Slice("bar")));
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// Create txn3 after flushing, when this transaction is commited,
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// only need to check the active memtable
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Transaction* txn3 = txn_db->BeginTransaction(write_options);
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ASSERT_TRUE(txn3 != nullptr);
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// Commit both of txn and txn2. txn will conflict but txn2 will
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// pass. In both ways, both memtables are queried.
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SetPerfLevel(PerfLevel::kEnableCount);
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get_perf_context()->Reset();
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s = txn->Commit();
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// We should have checked two memtables
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ASSERT_EQ(2, get_perf_context()->get_from_memtable_count);
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// txn should fail because of conflict, even if the memtable
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// has flushed, because it is still preserved in history.
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ASSERT_TRUE(s.IsBusy());
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get_perf_context()->Reset();
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s = txn2->Commit();
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// We should have checked two memtables
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ASSERT_EQ(2, get_perf_context()->get_from_memtable_count);
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ASSERT_TRUE(s.ok());
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txn3->Put(Slice("foo2"), Slice("bar2"));
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get_perf_context()->Reset();
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s = txn3->Commit();
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// txn3 is created after the active memtable is created, so that is the only
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// memtable to check.
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ASSERT_EQ(1, get_perf_context()->get_from_memtable_count);
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ASSERT_TRUE(s.ok());
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TEST_SYNC_POINT("OptimisticTransactionTest.CheckKeySkipOldMemtable");
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rocksdb::SyncPoint::GetInstance()->DisableProcessing();
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SetPerfLevel(PerfLevel::kDisable);
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delete txn;
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delete txn2;
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delete txn3;
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}
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}
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TEST_F(OptimisticTransactionTest, NoSnapshotTest) {
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WriteOptions write_options;
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ReadOptions read_options;
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string value;
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Status s;
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txn_db->Put(write_options, "AAA", "bar");
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Transaction* txn = txn_db->BeginTransaction(write_options);
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ASSERT_TRUE(txn);
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// Modify key after transaction start
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txn_db->Put(write_options, "AAA", "bar1");
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// Read and write without a snapshot
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txn->GetForUpdate(read_options, "AAA", &value);
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ASSERT_EQ(value, "bar1");
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txn->Put("AAA", "bar2");
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// Should commit since read/write was done after data changed
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s = txn->Commit();
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ASSERT_OK(s);
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txn->GetForUpdate(read_options, "AAA", &value);
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ASSERT_EQ(value, "bar2");
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delete txn;
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}
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TEST_F(OptimisticTransactionTest, MultipleSnapshotTest) {
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WriteOptions write_options;
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ReadOptions read_options, snapshot_read_options;
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string value;
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Status s;
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txn_db->Put(write_options, "AAA", "bar");
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txn_db->Put(write_options, "BBB", "bar");
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txn_db->Put(write_options, "CCC", "bar");
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Transaction* txn = txn_db->BeginTransaction(write_options);
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ASSERT_TRUE(txn);
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txn_db->Put(write_options, "AAA", "bar1");
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// Read and write without a snapshot
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txn->GetForUpdate(read_options, "AAA", &value);
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ASSERT_EQ(value, "bar1");
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txn->Put("AAA", "bar2");
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// Modify BBB before snapshot is taken
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txn_db->Put(write_options, "BBB", "bar1");
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txn->SetSnapshot();
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snapshot_read_options.snapshot = txn->GetSnapshot();
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// Read and write with snapshot
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|
txn->GetForUpdate(snapshot_read_options, "BBB", &value);
|
|
ASSERT_EQ(value, "bar1");
|
|
txn->Put("BBB", "bar2");
|
|
|
|
txn_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");
|
|
txn->Put("CCC", "bar2");
|
|
|
|
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 = txn_db->Get(read_options, "AAA", &value);
|
|
ASSERT_OK(s);
|
|
ASSERT_EQ(value, "bar1");
|
|
s = txn_db->Get(read_options, "BBB", &value);
|
|
ASSERT_OK(s);
|
|
ASSERT_EQ(value, "bar1");
|
|
s = txn_db->Get(read_options, "CCC", &value);
|
|
ASSERT_OK(s);
|
|
ASSERT_EQ(value, "bar1");
|
|
|
|
s = txn->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
s = txn_db->Get(read_options, "AAA", &value);
|
|
ASSERT_OK(s);
|
|
ASSERT_EQ(value, "bar2");
|
|
s = txn_db->Get(read_options, "BBB", &value);
|
|
ASSERT_OK(s);
|
|
ASSERT_EQ(value, "bar2");
|
|
s = txn_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 = txn_db->BeginTransaction(write_options);
|
|
|
|
// Potentially conflicting writes
|
|
txn_db->Put(write_options, "ZZZ", "zzz");
|
|
txn_db->Put(write_options, "XXX", "xxx");
|
|
|
|
txn->SetSnapshot();
|
|
|
|
OptimisticTransactionOptions txn_options;
|
|
txn_options.set_snapshot = true;
|
|
Transaction* txn2 = txn_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).
|
|
txn->Put("ZZZ", "zzzz");
|
|
s = txn->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
delete txn;
|
|
|
|
// This will conflict since the snapshot is earlier than another write to ZZZ
|
|
txn2->Put("ZZZ", "xxxxx");
|
|
|
|
s = txn2->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
|
|
delete txn2;
|
|
}
|
|
|
|
TEST_F(OptimisticTransactionTest, ColumnFamiliesTest) {
|
|
WriteOptions write_options;
|
|
ReadOptions read_options, snapshot_read_options;
|
|
OptimisticTransactionOptions txn_options;
|
|
string value;
|
|
Status s;
|
|
|
|
ColumnFamilyHandle *cfa, *cfb;
|
|
ColumnFamilyOptions cf_options;
|
|
|
|
// Create 2 new column families
|
|
s = txn_db->CreateColumnFamily(cf_options, "CFA", &cfa);
|
|
ASSERT_OK(s);
|
|
s = txn_db->CreateColumnFamily(cf_options, "CFB", &cfb);
|
|
ASSERT_OK(s);
|
|
|
|
delete cfa;
|
|
delete cfb;
|
|
delete txn_db;
|
|
txn_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 = OptimisticTransactionDB::Open(options, dbname, column_families, &handles,
|
|
&txn_db);
|
|
ASSERT_OK(s);
|
|
assert(txn_db != nullptr);
|
|
|
|
Transaction* txn = txn_db->BeginTransaction(write_options);
|
|
ASSERT_TRUE(txn);
|
|
|
|
txn->SetSnapshot();
|
|
snapshot_read_options.snapshot = txn->GetSnapshot();
|
|
|
|
txn_options.set_snapshot = true;
|
|
Transaction* txn2 = txn_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 = txn_db->Write(write_options, &batch);
|
|
ASSERT_OK(s);
|
|
txn_db->Delete(write_options, handles[1], "AAAZZZ");
|
|
|
|
// These keys do no conflict with existing writes since they're in
|
|
// different column families
|
|
txn->Delete("AAA");
|
|
txn->GetForUpdate(snapshot_read_options, handles[1], "foo", &value);
|
|
Slice key_slice("AAAZZZ");
|
|
Slice value_slices[2] = {Slice("bar"), Slice("bar")};
|
|
txn->Put(handles[2], SliceParts(&key_slice, 1), SliceParts(value_slices, 2));
|
|
|
|
ASSERT_EQ(3, txn->GetNumKeys());
|
|
|
|
// Txn should commit
|
|
s = txn->Commit();
|
|
ASSERT_OK(s);
|
|
s = txn_db->Get(read_options, "AAA", &value);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
s = txn_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");
|
|
// This write will cause a conflict with the earlier batch write
|
|
txn2->Put(handles[1], SliceParts(key_slices, 3), SliceParts(&value_slice, 1));
|
|
|
|
txn2->Delete(handles[2], "XXX");
|
|
txn2->Delete(handles[1], "XXX");
|
|
s = txn2->GetForUpdate(snapshot_read_options, handles[1], "AAA", &value);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
|
|
// Verify txn did not commit
|
|
s = txn2->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
s = txn_db->Get(read_options, handles[1], "AAAZZZ", &value);
|
|
ASSERT_EQ(value, "barbar");
|
|
|
|
delete txn;
|
|
delete txn2;
|
|
|
|
txn = txn_db->BeginTransaction(write_options, txn_options);
|
|
snapshot_read_options.snapshot = txn->GetSnapshot();
|
|
|
|
txn2 = txn_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");
|
|
|
|
txn->Delete(handles[2], "ZZZ");
|
|
txn->Put(handles[2], "ZZZ", "YYY");
|
|
txn->Put(handles[2], "ZZZ", "YYYY");
|
|
txn->Delete(handles[2], "ZZZ");
|
|
txn->Put(handles[2], "AAAZZZ", "barbarbar");
|
|
|
|
ASSERT_EQ(5, txn->GetNumKeys());
|
|
|
|
// Txn should commit
|
|
s = txn->Commit();
|
|
ASSERT_OK(s);
|
|
s = txn_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
|
|
txn_db->Put(write_options, handles[2], "foo", "000");
|
|
|
|
results = txn2->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");
|
|
|
|
// Verify Txn Did not Commit
|
|
s = txn2->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
|
|
s = txn_db->DropColumnFamily(handles[1]);
|
|
ASSERT_OK(s);
|
|
s = txn_db->DropColumnFamily(handles[2]);
|
|
ASSERT_OK(s);
|
|
|
|
delete txn;
|
|
delete txn2;
|
|
|
|
for (auto handle : handles) {
|
|
delete handle;
|
|
}
|
|
}
|
|
|
|
TEST_F(OptimisticTransactionTest, EmptyTest) {
|
|
WriteOptions write_options;
|
|
ReadOptions read_options;
|
|
string value;
|
|
Status s;
|
|
|
|
s = txn_db->Put(write_options, "aaa", "aaa");
|
|
ASSERT_OK(s);
|
|
|
|
Transaction* txn = txn_db->BeginTransaction(write_options);
|
|
s = txn->Commit();
|
|
ASSERT_OK(s);
|
|
delete txn;
|
|
|
|
txn = txn_db->BeginTransaction(write_options);
|
|
txn->Rollback();
|
|
delete txn;
|
|
|
|
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 = txn_db->BeginTransaction(write_options);
|
|
txn->SetSnapshot();
|
|
s = txn->GetForUpdate(read_options, "aaa", &value);
|
|
ASSERT_EQ(value, "aaa");
|
|
|
|
s = txn_db->Put(write_options, "aaa", "xxx");
|
|
s = txn->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
delete txn;
|
|
}
|
|
|
|
TEST_F(OptimisticTransactionTest, PredicateManyPreceders) {
|
|
WriteOptions write_options;
|
|
ReadOptions read_options1, read_options2;
|
|
OptimisticTransactionOptions txn_options;
|
|
string value;
|
|
Status s;
|
|
|
|
txn_options.set_snapshot = true;
|
|
Transaction* txn1 = txn_db->BeginTransaction(write_options, txn_options);
|
|
read_options1.snapshot = txn1->GetSnapshot();
|
|
|
|
Transaction* txn2 = txn_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());
|
|
|
|
txn2->Put("2", "x");
|
|
|
|
s = txn2->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
multiget_values.clear();
|
|
results =
|
|
txn1->MultiGetForUpdate(read_options1, multiget_keys, &multiget_values);
|
|
ASSERT_TRUE(results[1].IsNotFound());
|
|
|
|
// should not commit since txn2 wrote a key txn has read
|
|
s = txn1->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
|
|
delete txn1;
|
|
delete txn2;
|
|
|
|
txn1 = txn_db->BeginTransaction(write_options, txn_options);
|
|
read_options1.snapshot = txn1->GetSnapshot();
|
|
|
|
txn2 = txn_db->BeginTransaction(write_options, txn_options);
|
|
read_options2.snapshot = txn2->GetSnapshot();
|
|
|
|
txn1->Put("4", "x");
|
|
|
|
txn2->Delete("4");
|
|
|
|
// txn1 can commit since txn2's delete hasn't happened yet (it's just batched)
|
|
s = txn1->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
s = txn2->GetForUpdate(read_options2, "4", &value);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
|
|
// txn2 cannot commit since txn1 changed "4"
|
|
s = txn2->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
|
|
delete txn1;
|
|
delete txn2;
|
|
}
|
|
|
|
TEST_F(OptimisticTransactionTest, LostUpdate) {
|
|
WriteOptions write_options;
|
|
ReadOptions read_options, read_options1, read_options2;
|
|
OptimisticTransactionOptions txn_options;
|
|
string value;
|
|
Status s;
|
|
|
|
// Test 2 transactions writing to the same key in multiple orders and
|
|
// with/without snapshots
|
|
|
|
Transaction* txn1 = txn_db->BeginTransaction(write_options);
|
|
Transaction* txn2 = txn_db->BeginTransaction(write_options);
|
|
|
|
txn1->Put("1", "1");
|
|
txn2->Put("1", "2");
|
|
|
|
s = txn1->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
s = txn2->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
|
|
delete txn1;
|
|
delete txn2;
|
|
|
|
txn_options.set_snapshot = true;
|
|
txn1 = txn_db->BeginTransaction(write_options, txn_options);
|
|
read_options1.snapshot = txn1->GetSnapshot();
|
|
|
|
txn2 = txn_db->BeginTransaction(write_options, txn_options);
|
|
read_options2.snapshot = txn2->GetSnapshot();
|
|
|
|
txn1->Put("1", "3");
|
|
txn2->Put("1", "4");
|
|
|
|
s = txn1->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
s = txn2->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
|
|
delete txn1;
|
|
delete txn2;
|
|
|
|
txn1 = txn_db->BeginTransaction(write_options, txn_options);
|
|
read_options1.snapshot = txn1->GetSnapshot();
|
|
|
|
txn2 = txn_db->BeginTransaction(write_options, txn_options);
|
|
read_options2.snapshot = txn2->GetSnapshot();
|
|
|
|
txn1->Put("1", "5");
|
|
s = txn1->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
txn2->Put("1", "6");
|
|
s = txn2->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
|
|
delete txn1;
|
|
delete txn2;
|
|
|
|
txn1 = txn_db->BeginTransaction(write_options, txn_options);
|
|
read_options1.snapshot = txn1->GetSnapshot();
|
|
|
|
txn2 = txn_db->BeginTransaction(write_options, txn_options);
|
|
read_options2.snapshot = txn2->GetSnapshot();
|
|
|
|
txn1->Put("1", "5");
|
|
s = txn1->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
txn2->SetSnapshot();
|
|
txn2->Put("1", "6");
|
|
s = txn2->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
delete txn1;
|
|
delete txn2;
|
|
|
|
txn1 = txn_db->BeginTransaction(write_options);
|
|
txn2 = txn_db->BeginTransaction(write_options);
|
|
|
|
txn1->Put("1", "7");
|
|
s = txn1->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
txn2->Put("1", "8");
|
|
s = txn2->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
delete txn1;
|
|
delete txn2;
|
|
|
|
s = txn_db->Get(read_options, "1", &value);
|
|
ASSERT_OK(s);
|
|
ASSERT_EQ(value, "8");
|
|
}
|
|
|
|
TEST_F(OptimisticTransactionTest, UntrackedWrites) {
|
|
WriteOptions write_options;
|
|
ReadOptions read_options;
|
|
string value;
|
|
Status s;
|
|
|
|
// Verify transaction rollback works for untracked keys.
|
|
Transaction* txn = txn_db->BeginTransaction(write_options);
|
|
txn->PutUntracked("untracked", "0");
|
|
txn->Rollback();
|
|
s = txn_db->Get(read_options, "untracked", &value);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
|
|
delete txn;
|
|
txn = txn_db->BeginTransaction(write_options);
|
|
|
|
txn->Put("tracked", "1");
|
|
txn->PutUntracked("untracked", "1");
|
|
txn->MergeUntracked("untracked", "2");
|
|
txn->DeleteUntracked("untracked");
|
|
|
|
// Write to the untracked key outside of the transaction and verify
|
|
// it doesn't prevent the transaction from committing.
|
|
s = txn_db->Put(write_options, "untracked", "x");
|
|
ASSERT_OK(s);
|
|
|
|
s = txn->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
s = txn_db->Get(read_options, "untracked", &value);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
|
|
delete txn;
|
|
txn = txn_db->BeginTransaction(write_options);
|
|
|
|
txn->Put("tracked", "10");
|
|
txn->PutUntracked("untracked", "A");
|
|
|
|
// Write to tracked key outside of the transaction and verify that the
|
|
// untracked keys are not written when the commit fails.
|
|
s = txn_db->Delete(write_options, "tracked");
|
|
|
|
s = txn->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
|
|
s = txn_db->Get(read_options, "untracked", &value);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
|
|
delete txn;
|
|
}
|
|
|
|
TEST_F(OptimisticTransactionTest, IteratorTest) {
|
|
WriteOptions write_options;
|
|
ReadOptions read_options, snapshot_read_options;
|
|
OptimisticTransactionOptions txn_options;
|
|
string value;
|
|
Status s;
|
|
|
|
// Write some keys to the db
|
|
s = txn_db->Put(write_options, "A", "a");
|
|
ASSERT_OK(s);
|
|
|
|
s = txn_db->Put(write_options, "G", "g");
|
|
ASSERT_OK(s);
|
|
|
|
s = txn_db->Put(write_options, "F", "f");
|
|
ASSERT_OK(s);
|
|
|
|
s = txn_db->Put(write_options, "C", "c");
|
|
ASSERT_OK(s);
|
|
|
|
s = txn_db->Put(write_options, "D", "d");
|
|
ASSERT_OK(s);
|
|
|
|
Transaction* txn = 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 = txn_db->Put(write_options, "BB", "xx");
|
|
ASSERT_OK(s);
|
|
|
|
s = txn_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);
|
|
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());
|
|
|
|
// key "C" was modified in the db after txn's snapshot. txn will not commit.
|
|
s = txn->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
|
|
delete iter;
|
|
delete txn;
|
|
}
|
|
|
|
TEST_F(OptimisticTransactionTest, SavepointTest) {
|
|
WriteOptions write_options;
|
|
ReadOptions read_options, snapshot_read_options;
|
|
OptimisticTransactionOptions txn_options;
|
|
string value;
|
|
Status s;
|
|
|
|
Transaction* txn = txn_db->BeginTransaction(write_options);
|
|
ASSERT_TRUE(txn);
|
|
|
|
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);
|
|
|
|
s = txn->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
s = txn_db->Get(read_options, "B", &value);
|
|
ASSERT_OK(s);
|
|
ASSERT_EQ("b", value);
|
|
|
|
delete txn;
|
|
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_OK(txn->RollbackToSavePoint()); // Rollback to 2
|
|
|
|
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);
|
|
|
|
// Rollback to beginning of txn
|
|
s = txn->RollbackToSavePoint();
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
txn->Rollback();
|
|
|
|
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);
|
|
|
|
txn->SetSavePoint(); // 3
|
|
txn->SetSavePoint(); // 4
|
|
|
|
s = txn->Put("G", "g");
|
|
ASSERT_OK(s);
|
|
|
|
s = txn->Delete("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);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
|
|
s = txn->Get(read_options, "B", &value);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
|
|
ASSERT_OK(txn->RollbackToSavePoint()); // Rollback to 3
|
|
|
|
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 = txn_db->Get(read_options, "F", &value);
|
|
ASSERT_OK(s);
|
|
ASSERT_EQ("f", value);
|
|
|
|
s = txn_db->Get(read_options, "G", &value);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
|
|
s = txn_db->Get(read_options, "A", &value);
|
|
ASSERT_OK(s);
|
|
ASSERT_EQ("aa", value);
|
|
|
|
s = txn_db->Get(read_options, "B", &value);
|
|
ASSERT_OK(s);
|
|
ASSERT_EQ("b", value);
|
|
|
|
s = txn_db->Get(read_options, "C", &value);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
|
|
s = txn_db->Get(read_options, "D", &value);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
|
|
s = txn_db->Get(read_options, "E", &value);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
|
|
delete txn;
|
|
}
|
|
|
|
TEST_F(OptimisticTransactionTest, UndoGetForUpdateTest) {
|
|
WriteOptions write_options;
|
|
ReadOptions read_options, snapshot_read_options;
|
|
OptimisticTransactionOptions txn_options;
|
|
string value;
|
|
Status s;
|
|
|
|
txn_db->Put(write_options, "A", "");
|
|
|
|
Transaction* txn1 = txn_db->BeginTransaction(write_options);
|
|
ASSERT_TRUE(txn1);
|
|
|
|
s = txn1->GetForUpdate(read_options, "A", &value);
|
|
ASSERT_OK(s);
|
|
|
|
txn1->UndoGetForUpdate("A");
|
|
|
|
Transaction* txn2 = txn_db->BeginTransaction(write_options);
|
|
txn2->Put("A", "x");
|
|
s = txn2->Commit();
|
|
ASSERT_OK(s);
|
|
delete txn2;
|
|
|
|
// Verify that txn1 can commit since A isn't conflict checked
|
|
s = txn1->Commit();
|
|
ASSERT_OK(s);
|
|
delete txn1;
|
|
|
|
txn1 = txn_db->BeginTransaction(write_options);
|
|
txn1->Put("A", "a");
|
|
|
|
s = txn1->GetForUpdate(read_options, "A", &value);
|
|
ASSERT_OK(s);
|
|
|
|
txn1->UndoGetForUpdate("A");
|
|
|
|
txn2 = txn_db->BeginTransaction(write_options);
|
|
txn2->Put("A", "x");
|
|
s = txn2->Commit();
|
|
ASSERT_OK(s);
|
|
delete txn2;
|
|
|
|
// Verify that txn1 cannot commit since A will still be conflict checked
|
|
s = txn1->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
delete txn1;
|
|
|
|
txn1 = txn_db->BeginTransaction(write_options);
|
|
|
|
s = txn1->GetForUpdate(read_options, "A", &value);
|
|
ASSERT_OK(s);
|
|
s = txn1->GetForUpdate(read_options, "A", &value);
|
|
ASSERT_OK(s);
|
|
|
|
txn1->UndoGetForUpdate("A");
|
|
|
|
txn2 = txn_db->BeginTransaction(write_options);
|
|
txn2->Put("A", "x");
|
|
s = txn2->Commit();
|
|
ASSERT_OK(s);
|
|
delete txn2;
|
|
|
|
// Verify that txn1 cannot commit since A will still be conflict checked
|
|
s = txn1->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
delete txn1;
|
|
|
|
txn1 = txn_db->BeginTransaction(write_options);
|
|
|
|
s = txn1->GetForUpdate(read_options, "A", &value);
|
|
ASSERT_OK(s);
|
|
s = txn1->GetForUpdate(read_options, "A", &value);
|
|
ASSERT_OK(s);
|
|
|
|
txn1->UndoGetForUpdate("A");
|
|
txn1->UndoGetForUpdate("A");
|
|
|
|
txn2 = txn_db->BeginTransaction(write_options);
|
|
txn2->Put("A", "x");
|
|
s = txn2->Commit();
|
|
ASSERT_OK(s);
|
|
delete txn2;
|
|
|
|
// Verify that txn1 can commit since A isn't conflict checked
|
|
s = txn1->Commit();
|
|
ASSERT_OK(s);
|
|
delete txn1;
|
|
|
|
txn1 = txn_db->BeginTransaction(write_options);
|
|
|
|
s = txn1->GetForUpdate(read_options, "A", &value);
|
|
ASSERT_OK(s);
|
|
|
|
txn1->SetSavePoint();
|
|
txn1->UndoGetForUpdate("A");
|
|
|
|
txn2 = txn_db->BeginTransaction(write_options);
|
|
txn2->Put("A", "x");
|
|
s = txn2->Commit();
|
|
ASSERT_OK(s);
|
|
delete txn2;
|
|
|
|
// Verify that txn1 cannot commit since A will still be conflict checked
|
|
s = txn1->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
delete txn1;
|
|
|
|
txn1 = txn_db->BeginTransaction(write_options);
|
|
|
|
s = txn1->GetForUpdate(read_options, "A", &value);
|
|
ASSERT_OK(s);
|
|
|
|
txn1->SetSavePoint();
|
|
s = txn1->GetForUpdate(read_options, "A", &value);
|
|
ASSERT_OK(s);
|
|
txn1->UndoGetForUpdate("A");
|
|
|
|
txn2 = txn_db->BeginTransaction(write_options);
|
|
txn2->Put("A", "x");
|
|
s = txn2->Commit();
|
|
ASSERT_OK(s);
|
|
delete txn2;
|
|
|
|
// Verify that txn1 cannot commit since A will still be conflict checked
|
|
s = txn1->Commit();
|
|
ASSERT_TRUE(s.IsBusy());
|
|
delete txn1;
|
|
|
|
txn1 = txn_db->BeginTransaction(write_options);
|
|
|
|
s = txn1->GetForUpdate(read_options, "A", &value);
|
|
ASSERT_OK(s);
|
|
|
|
txn1->SetSavePoint();
|
|
s = txn1->GetForUpdate(read_options, "A", &value);
|
|
ASSERT_OK(s);
|
|
txn1->UndoGetForUpdate("A");
|
|
|
|
txn1->RollbackToSavePoint();
|
|
txn1->UndoGetForUpdate("A");
|
|
|
|
txn2 = txn_db->BeginTransaction(write_options);
|
|
txn2->Put("A", "x");
|
|
s = txn2->Commit();
|
|
ASSERT_OK(s);
|
|
delete txn2;
|
|
|
|
// Verify that txn1 can commit since A isn't conflict checked
|
|
s = txn1->Commit();
|
|
ASSERT_OK(s);
|
|
delete txn1;
|
|
}
|
|
|
|
namespace {
|
|
Status OptimisticTransactionStressTestInserter(OptimisticTransactionDB* 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;
|
|
OptimisticTransactionOptions 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.OptimisticTransactionDBInsert(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_F(OptimisticTransactionTest, OptimisticTransactionStressTest) {
|
|
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(OptimisticTransactionStressTestInserter(
|
|
txn_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(txn_db, num_sets);
|
|
ASSERT_OK(s);
|
|
}
|
|
|
|
TEST_F(OptimisticTransactionTest, SequenceNumberAfterRecoverTest) {
|
|
WriteOptions write_options;
|
|
OptimisticTransactionOptions transaction_options;
|
|
|
|
Transaction* transaction(txn_db->BeginTransaction(write_options, transaction_options));
|
|
Status s = transaction->Put("foo", "val");
|
|
ASSERT_OK(s);
|
|
s = transaction->Put("foo2", "val");
|
|
ASSERT_OK(s);
|
|
s = transaction->Put("foo3", "val");
|
|
ASSERT_OK(s);
|
|
s = transaction->Commit();
|
|
ASSERT_OK(s);
|
|
delete transaction;
|
|
|
|
Reopen();
|
|
transaction = txn_db->BeginTransaction(write_options, transaction_options);
|
|
s = transaction->Put("bar", "val");
|
|
ASSERT_OK(s);
|
|
s = transaction->Put("bar2", "val");
|
|
ASSERT_OK(s);
|
|
s = transaction->Commit();
|
|
ASSERT_OK(s);
|
|
|
|
delete transaction;
|
|
}
|
|
|
|
} // 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 optimistic_transaction is not supported in ROCKSDB_LITE\n");
|
|
return 0;
|
|
}
|
|
|
|
#endif // !ROCKSDB_LITE
|