fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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421 lines
15 KiB
421 lines
15 KiB
// 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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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "db/db_test_util.h"
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#include "port/stack_trace.h"
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#include "util/fault_injection_test_env.h"
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#include "util/sync_point.h"
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namespace rocksdb {
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class DBFlushTest : public DBTestBase {
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public:
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DBFlushTest() : DBTestBase("/db_flush_test") {}
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};
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class DBFlushDirectIOTest : public DBFlushTest,
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public ::testing::WithParamInterface<bool> {
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public:
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DBFlushDirectIOTest() : DBFlushTest() {}
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};
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class DBAtomicFlushTest : public DBFlushTest,
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public ::testing::WithParamInterface<bool> {
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public:
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DBAtomicFlushTest() : DBFlushTest() {}
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};
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// We had issue when two background threads trying to flush at the same time,
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// only one of them get committed. The test verifies the issue is fixed.
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TEST_F(DBFlushTest, FlushWhileWritingManifest) {
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Options options;
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options.disable_auto_compactions = true;
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options.max_background_flushes = 2;
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options.env = env_;
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Reopen(options);
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FlushOptions no_wait;
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no_wait.wait = false;
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no_wait.allow_write_stall=true;
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SyncPoint::GetInstance()->LoadDependency(
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{{"VersionSet::LogAndApply:WriteManifest",
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"DBFlushTest::FlushWhileWritingManifest:1"},
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{"MemTableList::TryInstallMemtableFlushResults:InProgress",
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"VersionSet::LogAndApply:WriteManifestDone"}});
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SyncPoint::GetInstance()->EnableProcessing();
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ASSERT_OK(Put("foo", "v"));
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ASSERT_OK(dbfull()->Flush(no_wait));
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TEST_SYNC_POINT("DBFlushTest::FlushWhileWritingManifest:1");
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ASSERT_OK(Put("bar", "v"));
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ASSERT_OK(dbfull()->Flush(no_wait));
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// If the issue is hit we will wait here forever.
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dbfull()->TEST_WaitForFlushMemTable();
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#ifndef ROCKSDB_LITE
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ASSERT_EQ(2, TotalTableFiles());
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#endif // ROCKSDB_LITE
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}
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// Disable this test temporarily on Travis as it fails intermittently.
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// Github issue: #4151
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TEST_F(DBFlushTest, SyncFail) {
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std::unique_ptr<FaultInjectionTestEnv> fault_injection_env(
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new FaultInjectionTestEnv(env_));
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Options options;
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options.disable_auto_compactions = true;
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options.env = fault_injection_env.get();
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SyncPoint::GetInstance()->LoadDependency(
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{{"DBFlushTest::SyncFail:GetVersionRefCount:1",
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"DBImpl::FlushMemTableToOutputFile:BeforePickMemtables"},
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{"DBImpl::FlushMemTableToOutputFile:AfterPickMemtables",
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"DBFlushTest::SyncFail:GetVersionRefCount:2"},
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{"DBFlushTest::SyncFail:1", "DBImpl::SyncClosedLogs:Start"},
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{"DBImpl::SyncClosedLogs:Failed", "DBFlushTest::SyncFail:2"}});
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SyncPoint::GetInstance()->EnableProcessing();
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CreateAndReopenWithCF({"pikachu"}, options);
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Put("key", "value");
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auto* cfd =
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reinterpret_cast<ColumnFamilyHandleImpl*>(db_->DefaultColumnFamily())
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->cfd();
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FlushOptions flush_options;
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flush_options.wait = false;
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ASSERT_OK(dbfull()->Flush(flush_options));
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// Flush installs a new super-version. Get the ref count after that.
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auto current_before = cfd->current();
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int refs_before = cfd->current()->TEST_refs();
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TEST_SYNC_POINT("DBFlushTest::SyncFail:GetVersionRefCount:1");
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TEST_SYNC_POINT("DBFlushTest::SyncFail:GetVersionRefCount:2");
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int refs_after_picking_memtables = cfd->current()->TEST_refs();
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ASSERT_EQ(refs_before + 1, refs_after_picking_memtables);
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fault_injection_env->SetFilesystemActive(false);
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TEST_SYNC_POINT("DBFlushTest::SyncFail:1");
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TEST_SYNC_POINT("DBFlushTest::SyncFail:2");
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fault_injection_env->SetFilesystemActive(true);
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// Now the background job will do the flush; wait for it.
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dbfull()->TEST_WaitForFlushMemTable();
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#ifndef ROCKSDB_LITE
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ASSERT_EQ("", FilesPerLevel()); // flush failed.
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#endif // ROCKSDB_LITE
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// Backgroun flush job should release ref count to current version.
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ASSERT_EQ(current_before, cfd->current());
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ASSERT_EQ(refs_before, cfd->current()->TEST_refs());
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Destroy(options);
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}
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TEST_F(DBFlushTest, SyncSkip) {
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Options options = CurrentOptions();
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SyncPoint::GetInstance()->LoadDependency(
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{{"DBFlushTest::SyncSkip:1", "DBImpl::SyncClosedLogs:Skip"},
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{"DBImpl::SyncClosedLogs:Skip", "DBFlushTest::SyncSkip:2"}});
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SyncPoint::GetInstance()->EnableProcessing();
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Reopen(options);
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Put("key", "value");
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FlushOptions flush_options;
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flush_options.wait = false;
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ASSERT_OK(dbfull()->Flush(flush_options));
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TEST_SYNC_POINT("DBFlushTest::SyncSkip:1");
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TEST_SYNC_POINT("DBFlushTest::SyncSkip:2");
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// Now the background job will do the flush; wait for it.
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dbfull()->TEST_WaitForFlushMemTable();
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Destroy(options);
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}
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TEST_F(DBFlushTest, FlushInLowPriThreadPool) {
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// Verify setting an empty high-pri (flush) thread pool causes flushes to be
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// scheduled in the low-pri (compaction) thread pool.
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Options options = CurrentOptions();
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options.level0_file_num_compaction_trigger = 4;
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options.memtable_factory.reset(new SpecialSkipListFactory(1));
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Reopen(options);
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env_->SetBackgroundThreads(0, Env::HIGH);
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std::thread::id tid;
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int num_flushes = 0, num_compactions = 0;
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SyncPoint::GetInstance()->SetCallBack(
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"DBImpl::BGWorkFlush", [&](void* /*arg*/) {
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if (tid == std::thread::id()) {
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tid = std::this_thread::get_id();
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} else {
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ASSERT_EQ(tid, std::this_thread::get_id());
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}
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++num_flushes;
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});
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SyncPoint::GetInstance()->SetCallBack(
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"DBImpl::BGWorkCompaction", [&](void* /*arg*/) {
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ASSERT_EQ(tid, std::this_thread::get_id());
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++num_compactions;
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});
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SyncPoint::GetInstance()->EnableProcessing();
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ASSERT_OK(Put("key", "val"));
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for (int i = 0; i < 4; ++i) {
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ASSERT_OK(Put("key", "val"));
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dbfull()->TEST_WaitForFlushMemTable();
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}
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dbfull()->TEST_WaitForCompact();
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ASSERT_EQ(4, num_flushes);
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ASSERT_EQ(1, num_compactions);
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}
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TEST_F(DBFlushTest, ManualFlushWithMinWriteBufferNumberToMerge) {
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Options options = CurrentOptions();
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options.write_buffer_size = 100;
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options.max_write_buffer_number = 4;
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options.min_write_buffer_number_to_merge = 3;
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Reopen(options);
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SyncPoint::GetInstance()->LoadDependency(
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{{"DBImpl::BGWorkFlush",
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"DBFlushTest::ManualFlushWithMinWriteBufferNumberToMerge:1"},
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{"DBFlushTest::ManualFlushWithMinWriteBufferNumberToMerge:2",
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"FlushJob::WriteLevel0Table"}});
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SyncPoint::GetInstance()->EnableProcessing();
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ASSERT_OK(Put("key1", "value1"));
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port::Thread t([&]() {
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// The call wait for flush to finish, i.e. with flush_options.wait = true.
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ASSERT_OK(Flush());
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});
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// Wait for flush start.
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TEST_SYNC_POINT("DBFlushTest::ManualFlushWithMinWriteBufferNumberToMerge:1");
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// Insert a second memtable before the manual flush finish.
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// At the end of the manual flush job, it will check if further flush
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// is needed, but it will not trigger flush of the second memtable because
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// min_write_buffer_number_to_merge is not reached.
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ASSERT_OK(Put("key2", "value2"));
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ASSERT_OK(dbfull()->TEST_SwitchMemtable());
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TEST_SYNC_POINT("DBFlushTest::ManualFlushWithMinWriteBufferNumberToMerge:2");
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// Manual flush should return, without waiting for flush indefinitely.
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t.join();
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}
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TEST_P(DBFlushDirectIOTest, DirectIO) {
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Options options;
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options.create_if_missing = true;
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options.disable_auto_compactions = true;
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options.max_background_flushes = 2;
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options.use_direct_io_for_flush_and_compaction = GetParam();
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options.env = new MockEnv(Env::Default());
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SyncPoint::GetInstance()->SetCallBack(
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"BuildTable:create_file", [&](void* arg) {
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bool* use_direct_writes = static_cast<bool*>(arg);
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ASSERT_EQ(*use_direct_writes,
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options.use_direct_io_for_flush_and_compaction);
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});
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SyncPoint::GetInstance()->EnableProcessing();
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Reopen(options);
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ASSERT_OK(Put("foo", "v"));
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FlushOptions flush_options;
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flush_options.wait = true;
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ASSERT_OK(dbfull()->Flush(flush_options));
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Destroy(options);
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delete options.env;
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}
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TEST_F(DBFlushTest, FlushError) {
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Options options;
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std::unique_ptr<FaultInjectionTestEnv> fault_injection_env(
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new FaultInjectionTestEnv(env_));
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options.write_buffer_size = 100;
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options.max_write_buffer_number = 4;
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options.min_write_buffer_number_to_merge = 3;
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options.disable_auto_compactions = true;
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options.env = fault_injection_env.get();
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Reopen(options);
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ASSERT_OK(Put("key1", "value1"));
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ASSERT_OK(Put("key2", "value2"));
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fault_injection_env->SetFilesystemActive(false);
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Status s = dbfull()->TEST_SwitchMemtable();
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fault_injection_env->SetFilesystemActive(true);
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Destroy(options);
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ASSERT_NE(s, Status::OK());
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}
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TEST_F(DBFlushTest, ManualFlushFailsInReadOnlyMode) {
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// Regression test for bug where manual flush hangs forever when the DB
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// is in read-only mode. Verify it now at least returns, despite failing.
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Options options;
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std::unique_ptr<FaultInjectionTestEnv> fault_injection_env(
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new FaultInjectionTestEnv(env_));
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options.env = fault_injection_env.get();
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options.max_write_buffer_number = 2;
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Reopen(options);
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// Trigger a first flush but don't let it run
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ASSERT_OK(db_->PauseBackgroundWork());
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ASSERT_OK(Put("key1", "value1"));
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FlushOptions flush_opts;
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flush_opts.wait = false;
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ASSERT_OK(db_->Flush(flush_opts));
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// Write a key to the second memtable so we have something to flush later
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// after the DB is in read-only mode.
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ASSERT_OK(Put("key2", "value2"));
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// Let the first flush continue, hit an error, and put the DB in read-only
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// mode.
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fault_injection_env->SetFilesystemActive(false);
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ASSERT_OK(db_->ContinueBackgroundWork());
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dbfull()->TEST_WaitForFlushMemTable();
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#ifndef ROCKSDB_LITE
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uint64_t num_bg_errors;
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ASSERT_TRUE(db_->GetIntProperty(DB::Properties::kBackgroundErrors,
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&num_bg_errors));
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ASSERT_GT(num_bg_errors, 0);
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#endif // ROCKSDB_LITE
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// In the bug scenario, triggering another flush would cause the second flush
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// to hang forever. After the fix we expect it to return an error.
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ASSERT_NOK(db_->Flush(FlushOptions()));
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Close();
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}
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TEST_P(DBAtomicFlushTest, ManualAtomicFlush) {
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Options options = CurrentOptions();
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options.create_if_missing = true;
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options.atomic_flush = GetParam();
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options.write_buffer_size = (static_cast<size_t>(64) << 20);
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CreateAndReopenWithCF({"pikachu", "eevee"}, options);
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size_t num_cfs = handles_.size();
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ASSERT_EQ(3, num_cfs);
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WriteOptions wopts;
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wopts.disableWAL = true;
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for (size_t i = 0; i != num_cfs; ++i) {
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ASSERT_OK(Put(static_cast<int>(i) /*cf*/, "key", "value", wopts));
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}
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std::vector<int> cf_ids;
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for (size_t i = 0; i != num_cfs; ++i) {
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cf_ids.emplace_back(static_cast<int>(i));
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}
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ASSERT_OK(Flush(cf_ids));
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for (size_t i = 0; i != num_cfs; ++i) {
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auto cfh = static_cast<ColumnFamilyHandleImpl*>(handles_[i]);
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ASSERT_EQ(0, cfh->cfd()->imm()->NumNotFlushed());
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ASSERT_TRUE(cfh->cfd()->mem()->IsEmpty());
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}
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}
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TEST_P(DBAtomicFlushTest, AtomicFlushTriggeredByMemTableFull) {
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Options options = CurrentOptions();
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options.create_if_missing = true;
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options.atomic_flush = GetParam();
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// 4KB so that we can easily trigger auto flush.
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options.write_buffer_size = 4096;
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SyncPoint::GetInstance()->LoadDependency(
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{{"DBImpl::BackgroundCallFlush:FlushFinish:0",
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"DBAtomicFlushTest::AtomicFlushTriggeredByMemTableFull:BeforeCheck"}});
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SyncPoint::GetInstance()->EnableProcessing();
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CreateAndReopenWithCF({"pikachu", "eevee"}, options);
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size_t num_cfs = handles_.size();
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ASSERT_EQ(3, num_cfs);
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WriteOptions wopts;
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wopts.disableWAL = true;
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for (size_t i = 0; i != num_cfs; ++i) {
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ASSERT_OK(Put(static_cast<int>(i) /*cf*/, "key", "value", wopts));
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}
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// Keep writing to one of them column families to trigger auto flush.
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for (int i = 0; i != 4000; ++i) {
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ASSERT_OK(Put(static_cast<int>(num_cfs) - 1 /*cf*/,
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"key" + std::to_string(i), "value" + std::to_string(i),
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wopts));
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}
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TEST_SYNC_POINT(
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"DBAtomicFlushTest::AtomicFlushTriggeredByMemTableFull:BeforeCheck");
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if (options.atomic_flush) {
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for (size_t i = 0; i != num_cfs - 1; ++i) {
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auto cfh = static_cast<ColumnFamilyHandleImpl*>(handles_[i]);
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ASSERT_EQ(0, cfh->cfd()->imm()->NumNotFlushed());
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ASSERT_TRUE(cfh->cfd()->mem()->IsEmpty());
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}
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} else {
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for (size_t i = 0; i != num_cfs - 1; ++i) {
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auto cfh = static_cast<ColumnFamilyHandleImpl*>(handles_[i]);
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ASSERT_EQ(0, cfh->cfd()->imm()->NumNotFlushed());
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ASSERT_FALSE(cfh->cfd()->mem()->IsEmpty());
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}
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}
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SyncPoint::GetInstance()->DisableProcessing();
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}
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TEST_P(DBAtomicFlushTest, AtomicFlushRollbackSomeJobs) {
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bool atomic_flush = GetParam();
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if (!atomic_flush) {
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return;
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}
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std::unique_ptr<FaultInjectionTestEnv> fault_injection_env(
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new FaultInjectionTestEnv(env_));
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Options options = CurrentOptions();
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options.create_if_missing = true;
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options.atomic_flush = atomic_flush;
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options.env = fault_injection_env.get();
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SyncPoint::GetInstance()->DisableProcessing();
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SyncPoint::GetInstance()->LoadDependency(
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{{"DBImpl::AtomicFlushMemTablesToOutputFiles:SomeFlushJobsComplete:1",
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"DBAtomicFlushTest::AtomicFlushRollbackSomeJobs:1"},
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{"DBAtomicFlushTest::AtomicFlushRollbackSomeJobs:2",
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"DBImpl::AtomicFlushMemTablesToOutputFiles:SomeFlushJobsComplete:2"}});
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SyncPoint::GetInstance()->EnableProcessing();
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CreateAndReopenWithCF({"pikachu", "eevee"}, options);
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size_t num_cfs = handles_.size();
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ASSERT_EQ(3, num_cfs);
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WriteOptions wopts;
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wopts.disableWAL = true;
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for (size_t i = 0; i != num_cfs; ++i) {
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int cf_id = static_cast<int>(i);
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ASSERT_OK(Put(cf_id, "key", "value", wopts));
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}
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FlushOptions flush_opts;
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flush_opts.wait = false;
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ASSERT_OK(dbfull()->Flush(flush_opts, handles_));
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TEST_SYNC_POINT("DBAtomicFlushTest::AtomicFlushRollbackSomeJobs:1");
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fault_injection_env->SetFilesystemActive(false);
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TEST_SYNC_POINT("DBAtomicFlushTest::AtomicFlushRollbackSomeJobs:2");
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for (auto* cfh : handles_) {
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dbfull()->TEST_WaitForFlushMemTable(cfh);
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}
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for (size_t i = 0; i != num_cfs; ++i) {
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auto cfh = static_cast<ColumnFamilyHandleImpl*>(handles_[i]);
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ASSERT_EQ(1, cfh->cfd()->imm()->NumNotFlushed());
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ASSERT_TRUE(cfh->cfd()->mem()->IsEmpty());
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}
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fault_injection_env->SetFilesystemActive(true);
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Destroy(options);
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}
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INSTANTIATE_TEST_CASE_P(DBFlushDirectIOTest, DBFlushDirectIOTest,
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testing::Bool());
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INSTANTIATE_TEST_CASE_P(DBAtomicFlushTest, DBAtomicFlushTest, testing::Bool());
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} // namespace rocksdb
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int main(int argc, char** argv) {
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rocksdb::port::InstallStackTraceHandler();
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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