rocksdb/db/db_sst_test.cc

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include "db/db_test_util.h"
#include "file/sst_file_manager_impl.h"
#include "port/port.h"
#include "port/stack_trace.h"
#include "rocksdb/sst_file_manager.h"
#include "util/random.h"
namespace ROCKSDB_NAMESPACE {
class DBSSTTest : public DBTestBase {
public:
DBSSTTest() : DBTestBase("/db_sst_test", /*env_do_fsync=*/true) {}
};
#ifndef ROCKSDB_LITE
// A class which remembers the name of each flushed file.
class FlushedFileCollector : public EventListener {
public:
FlushedFileCollector() {}
~FlushedFileCollector() override {}
void OnFlushCompleted(DB* /*db*/, const FlushJobInfo& info) override {
std::lock_guard<std::mutex> lock(mutex_);
flushed_files_.push_back(info.file_path);
}
std::vector<std::string> GetFlushedFiles() {
std::lock_guard<std::mutex> lock(mutex_);
std::vector<std::string> result;
for (auto fname : flushed_files_) {
result.push_back(fname);
}
return result;
}
void ClearFlushedFiles() {
std::lock_guard<std::mutex> lock(mutex_);
flushed_files_.clear();
}
private:
std::vector<std::string> flushed_files_;
std::mutex mutex_;
};
#endif // ROCKSDB_LITE
TEST_F(DBSSTTest, DontDeletePendingOutputs) {
Options options;
options.env = env_;
options.create_if_missing = true;
DestroyAndReopen(options);
// Every time we write to a table file, call FOF/POF with full DB scan. This
// will make sure our pending_outputs_ protection work correctly
std::function<void()> purge_obsolete_files_function = [&]() {
JobContext job_context(0);
dbfull()->TEST_LockMutex();
dbfull()->FindObsoleteFiles(&job_context, true /*force*/);
dbfull()->TEST_UnlockMutex();
dbfull()->PurgeObsoleteFiles(job_context);
job_context.Clean();
};
env_->table_write_callback_ = &purge_obsolete_files_function;
for (int i = 0; i < 2; ++i) {
ASSERT_OK(Put("a", "begin"));
ASSERT_OK(Put("z", "end"));
ASSERT_OK(Flush());
}
// If pending output guard does not work correctly, PurgeObsoleteFiles() will
// delete the file that Compaction is trying to create, causing this: error
// db/db_test.cc:975: IO error:
// /tmp/rocksdbtest-1552237650/db_test/000009.sst: No such file or directory
Compact("a", "b");
}
// 1 Create some SST files by inserting K-V pairs into DB
// 2 Close DB and change suffix from ".sst" to ".ldb" for every other SST file
// 3 Open DB and check if all key can be read
TEST_F(DBSSTTest, SSTsWithLdbSuffixHandling) {
Options options = CurrentOptions();
options.write_buffer_size = 110 << 10; // 110KB
options.num_levels = 4;
DestroyAndReopen(options);
Random rnd(301);
int key_id = 0;
for (int i = 0; i < 10; ++i) {
GenerateNewFile(&rnd, &key_id, false);
}
Flush();
Close();
int const num_files = GetSstFileCount(dbname_);
ASSERT_GT(num_files, 0);
Reopen(options);
std::vector<std::string> values;
values.reserve(key_id);
for (int k = 0; k < key_id; ++k) {
values.push_back(Get(Key(k)));
}
Close();
std::vector<std::string> filenames;
GetSstFiles(env_, dbname_, &filenames);
int num_ldb_files = 0;
for (size_t i = 0; i < filenames.size(); ++i) {
if (i & 1) {
continue;
}
std::string const rdb_name = dbname_ + "/" + filenames[i];
std::string const ldb_name = Rocks2LevelTableFileName(rdb_name);
ASSERT_TRUE(env_->RenameFile(rdb_name, ldb_name).ok());
++num_ldb_files;
}
ASSERT_GT(num_ldb_files, 0);
ASSERT_EQ(num_files, GetSstFileCount(dbname_));
Reopen(options);
for (int k = 0; k < key_id; ++k) {
ASSERT_EQ(values[k], Get(Key(k)));
}
Destroy(options);
}
// Check that we don't crash when opening DB with
// DBOptions::skip_checking_sst_file_sizes_on_db_open = true.
TEST_F(DBSSTTest, SkipCheckingSSTFileSizesOnDBOpen) {
ASSERT_OK(Put("pika", "choo"));
ASSERT_OK(Flush());
// Just open the DB with the option set to true and check that we don't crash.
Options options;
options.skip_checking_sst_file_sizes_on_db_open = true;
Reopen(options);
ASSERT_EQ("choo", Get("pika"));
}
#ifndef ROCKSDB_LITE
TEST_F(DBSSTTest, DontDeleteMovedFile) {
// This test triggers move compaction and verifies that the file is not
// deleted when it's part of move compaction
Options options = CurrentOptions();
options.env = env_;
options.create_if_missing = true;
options.max_bytes_for_level_base = 1024 * 1024; // 1 MB
options.level0_file_num_compaction_trigger =
2; // trigger compaction when we have 2 files
DestroyAndReopen(options);
Random rnd(301);
// Create two 1MB sst files
for (int i = 0; i < 2; ++i) {
// Create 1MB sst file
for (int j = 0; j < 100; ++j) {
ASSERT_OK(Put(Key(i * 50 + j), rnd.RandomString(10 * 1024)));
}
ASSERT_OK(Flush());
}
// this should execute both L0->L1 and L1->(move)->L2 compactions
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("0,0,1", FilesPerLevel(0));
// If the moved file is actually deleted (the move-safeguard in
// ~Version::Version() is not there), we get this failure:
// Corruption: Can't access /000009.sst
Reopen(options);
}
// This reproduces a bug where we don't delete a file because when it was
// supposed to be deleted, it was blocked by pending_outputs
// Consider:
// 1. current file_number is 13
// 2. compaction (1) starts, blocks deletion of all files starting with 13
// (pending outputs)
// 3. file 13 is created by compaction (2)
// 4. file 13 is consumed by compaction (3) and file 15 was created. Since file
// 13 has no references, it is put into VersionSet::obsolete_files_
// 5. FindObsoleteFiles() gets file 13 from VersionSet::obsolete_files_. File 13
// is deleted from obsolete_files_ set.
// 6. PurgeObsoleteFiles() tries to delete file 13, but this file is blocked by
// pending outputs since compaction (1) is still running. It is not deleted and
// it is not present in obsolete_files_ anymore. Therefore, we never delete it.
TEST_F(DBSSTTest, DeleteObsoleteFilesPendingOutputs) {
Options options = CurrentOptions();
options.env = env_;
options.write_buffer_size = 2 * 1024 * 1024; // 2 MB
options.max_bytes_for_level_base = 1024 * 1024; // 1 MB
options.level0_file_num_compaction_trigger =
2; // trigger compaction when we have 2 files
options.max_background_flushes = 2;
options.max_background_compactions = 2;
OnFileDeletionListener* listener = new OnFileDeletionListener();
options.listeners.emplace_back(listener);
Reopen(options);
Random rnd(301);
// Create two 1MB sst files
for (int i = 0; i < 2; ++i) {
// Create 1MB sst file
for (int j = 0; j < 100; ++j) {
ASSERT_OK(Put(Key(i * 50 + j), rnd.RandomString(10 * 1024)));
}
ASSERT_OK(Flush());
}
// this should execute both L0->L1 and L1->(move)->L2 compactions
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("0,0,1", FilesPerLevel(0));
test::SleepingBackgroundTask blocking_thread;
port::Mutex mutex_;
bool already_blocked(false);
// block the flush
std::function<void()> block_first_time = [&]() {
bool blocking = false;
{
MutexLock l(&mutex_);
if (!already_blocked) {
blocking = true;
already_blocked = true;
}
}
if (blocking) {
blocking_thread.DoSleep();
}
};
env_->table_write_callback_ = &block_first_time;
// Insert 2.5MB data, which should trigger a flush because we exceed
// write_buffer_size. The flush will be blocked with block_first_time
// pending_file is protecting all the files created after
for (int j = 0; j < 256; ++j) {
ASSERT_OK(Put(Key(j), rnd.RandomString(10 * 1024)));
}
blocking_thread.WaitUntilSleeping();
ASSERT_OK(dbfull()->TEST_CompactRange(2, nullptr, nullptr));
ASSERT_EQ("0,0,0,1", FilesPerLevel(0));
std::vector<LiveFileMetaData> metadata;
db_->GetLiveFilesMetaData(&metadata);
ASSERT_EQ(metadata.size(), 1U);
auto file_on_L2 = metadata[0].name;
listener->SetExpectedFileName(dbname_ + file_on_L2);
ASSERT_OK(dbfull()->TEST_CompactRange(3, nullptr, nullptr, nullptr,
true /* disallow trivial move */));
ASSERT_EQ("0,0,0,0,1", FilesPerLevel(0));
// finish the flush!
blocking_thread.WakeUp();
blocking_thread.WaitUntilDone();
dbfull()->TEST_WaitForFlushMemTable();
// File just flushed is too big for L0 and L1 so gets moved to L2.
dbfull()->TEST_WaitForCompact();
ASSERT_EQ("0,0,1,0,1", FilesPerLevel(0));
metadata.clear();
db_->GetLiveFilesMetaData(&metadata);
ASSERT_EQ(metadata.size(), 2U);
// This file should have been deleted during last compaction
ASSERT_EQ(Status::NotFound(), env_->FileExists(dbname_ + file_on_L2));
listener->VerifyMatchedCount(1);
}
TEST_F(DBSSTTest, DBWithSstFileManager) {
std::shared_ptr<SstFileManager> sst_file_manager(NewSstFileManager(env_));
auto sfm = static_cast<SstFileManagerImpl*>(sst_file_manager.get());
int files_added = 0;
int files_deleted = 0;
int files_moved = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"SstFileManagerImpl::OnAddFile", [&](void* /*arg*/) { files_added++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"SstFileManagerImpl::OnDeleteFile",
[&](void* /*arg*/) { files_deleted++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"SstFileManagerImpl::OnMoveFile", [&](void* /*arg*/) { files_moved++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Options options = CurrentOptions();
options.sst_file_manager = sst_file_manager;
DestroyAndReopen(options);
Random rnd(301);
for (int i = 0; i < 25; i++) {
GenerateNewRandomFile(&rnd);
ASSERT_OK(Flush());
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_WaitForCompact();
// Verify that we are tracking all sst files in dbname_
std::unordered_map<std::string, uint64_t> files_in_db;
ASSERT_OK(GetAllSSTFiles(&files_in_db));
ASSERT_EQ(sfm->GetTrackedFiles(), files_in_db);
}
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
std::unordered_map<std::string, uint64_t> files_in_db;
ASSERT_OK(GetAllSSTFiles(&files_in_db));
// Verify that we are tracking all sst files in dbname_
ASSERT_EQ(sfm->GetTrackedFiles(), files_in_db);
// Verify the total files size
uint64_t total_files_size = 0;
for (auto& file_to_size : files_in_db) {
total_files_size += file_to_size.second;
}
ASSERT_EQ(sfm->GetTotalSize(), total_files_size);
// We flushed at least 25 files
ASSERT_GE(files_added, 25);
// Compaction must have deleted some files
ASSERT_GT(files_deleted, 0);
// No files were moved
ASSERT_EQ(files_moved, 0);
Close();
Reopen(options);
ASSERT_EQ(sfm->GetTrackedFiles(), files_in_db);
ASSERT_EQ(sfm->GetTotalSize(), total_files_size);
// Verify that we track all the files again after the DB is closed and opened
Close();
sst_file_manager.reset(NewSstFileManager(env_));
options.sst_file_manager = sst_file_manager;
sfm = static_cast<SstFileManagerImpl*>(sst_file_manager.get());
Reopen(options);
ASSERT_EQ(sfm->GetTrackedFiles(), files_in_db);
ASSERT_EQ(sfm->GetTotalSize(), total_files_size);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBSSTTest, RateLimitedDelete) {
Destroy(last_options_);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency({
{"DBSSTTest::RateLimitedDelete:1",
"DeleteScheduler::BackgroundEmptyTrash"},
});
std::vector<uint64_t> penalties;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::BackgroundEmptyTrash:Wait",
[&](void* arg) { penalties.push_back(*(static_cast<uint64_t*>(arg))); });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"InstrumentedCondVar::TimedWaitInternal", [&](void* arg) {
// Turn timed wait into a simulated sleep
uint64_t* abs_time_us = static_cast<uint64_t*>(arg);
uint64_t cur_time = env_->NowMicros();
if (*abs_time_us > cur_time) {
Fix+clean up handling of mock sleeps (#7101) Summary: We have a number of tests hanging on MacOS and windows due to mishandling of code for mock sleeps. In addition, the code was in terrible shape because the same variable (addon_time_) would sometimes refer to microseconds and sometimes to seconds. One test even assumed it was nanoseconds but was written to pass anyway. This has been cleaned up so that DB tests generally use a SpecialEnv function to mock sleep, for either some number of microseconds or seconds depending on the function called. But to call one of these, the test must first call SetMockSleep (precondition enforced with assertion), which also turns sleeps in RocksDB into mock sleeps. To also removes accounting for actual clock time, call SetTimeElapseOnlySleepOnReopen, which implies SetMockSleep (on DB re-open). This latter setting only works by applying on DB re-open, otherwise havoc can ensue if Env goes back in time with DB open. More specifics: Removed some unused test classes, and updated comments on the general problem. Fixed DBSSTTest.GetTotalSstFilesSize using a sync point callback instead of mock time. For this we have the only modification to production code, inserting a sync point callback in flush_job.cc, which is not a change to production behavior. Removed unnecessary resetting of mock times to 0 in many tests. RocksDB deals in relative time. Any behaviors relying on absolute date/time are likely a bug. (The above test DBSSTTest.GetTotalSstFilesSize was the only one clearly injecting a specific absolute time for actual testing convenience.) Just in case I misunderstood some test, I put this note in each replacement: // NOTE: Presumed unnecessary and removed: resetting mock time in env Strengthened some tests like MergeTestTime, MergeCompactionTimeTest, and FilterCompactionTimeTest in db_test.cc stats_history_test and blob_db_test are each their own beast, rather deeply dependent on MockTimeEnv. Each gets its own variant of a work-around for TimedWait in a mock time environment. (Reduces redundancy and inconsistency in stats_history_test.) Intended follow-up: Remove TimedWait from the public API of InstrumentedCondVar, and only make that accessible through Env by passing in an InstrumentedCondVar and a deadline. Then the Env implementations mocking time can fix this problem without using sync points. (Test infrastructure using sync points interferes with individual tests' control over sync points.) With that change, we can simplify/consolidate the scattered work-arounds. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7101 Test Plan: make check on Linux and MacOS Reviewed By: zhichao-cao Differential Revision: D23032815 Pulled By: pdillinger fbshipit-source-id: 7f33967ada8b83011fb54e8279365c008bd6610b
2020-08-11 21:39:49 +02:00
env_->MockSleepForMicroseconds(*abs_time_us - cur_time);
}
Fix+clean up handling of mock sleeps (#7101) Summary: We have a number of tests hanging on MacOS and windows due to mishandling of code for mock sleeps. In addition, the code was in terrible shape because the same variable (addon_time_) would sometimes refer to microseconds and sometimes to seconds. One test even assumed it was nanoseconds but was written to pass anyway. This has been cleaned up so that DB tests generally use a SpecialEnv function to mock sleep, for either some number of microseconds or seconds depending on the function called. But to call one of these, the test must first call SetMockSleep (precondition enforced with assertion), which also turns sleeps in RocksDB into mock sleeps. To also removes accounting for actual clock time, call SetTimeElapseOnlySleepOnReopen, which implies SetMockSleep (on DB re-open). This latter setting only works by applying on DB re-open, otherwise havoc can ensue if Env goes back in time with DB open. More specifics: Removed some unused test classes, and updated comments on the general problem. Fixed DBSSTTest.GetTotalSstFilesSize using a sync point callback instead of mock time. For this we have the only modification to production code, inserting a sync point callback in flush_job.cc, which is not a change to production behavior. Removed unnecessary resetting of mock times to 0 in many tests. RocksDB deals in relative time. Any behaviors relying on absolute date/time are likely a bug. (The above test DBSSTTest.GetTotalSstFilesSize was the only one clearly injecting a specific absolute time for actual testing convenience.) Just in case I misunderstood some test, I put this note in each replacement: // NOTE: Presumed unnecessary and removed: resetting mock time in env Strengthened some tests like MergeTestTime, MergeCompactionTimeTest, and FilterCompactionTimeTest in db_test.cc stats_history_test and blob_db_test are each their own beast, rather deeply dependent on MockTimeEnv. Each gets its own variant of a work-around for TimedWait in a mock time environment. (Reduces redundancy and inconsistency in stats_history_test.) Intended follow-up: Remove TimedWait from the public API of InstrumentedCondVar, and only make that accessible through Env by passing in an InstrumentedCondVar and a deadline. Then the Env implementations mocking time can fix this problem without using sync points. (Test infrastructure using sync points interferes with individual tests' control over sync points.) With that change, we can simplify/consolidate the scattered work-arounds. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7101 Test Plan: make check on Linux and MacOS Reviewed By: zhichao-cao Differential Revision: D23032815 Pulled By: pdillinger fbshipit-source-id: 7f33967ada8b83011fb54e8279365c008bd6610b
2020-08-11 21:39:49 +02:00
// Plus an additional short, random amount
env_->MockSleepForMicroseconds(Random::GetTLSInstance()->Uniform(10));
// Set wait until time to before (actual) current time to force not
// to sleep
*abs_time_us = Env::Default()->NowMicros();
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Options options = CurrentOptions();
Fix+clean up handling of mock sleeps (#7101) Summary: We have a number of tests hanging on MacOS and windows due to mishandling of code for mock sleeps. In addition, the code was in terrible shape because the same variable (addon_time_) would sometimes refer to microseconds and sometimes to seconds. One test even assumed it was nanoseconds but was written to pass anyway. This has been cleaned up so that DB tests generally use a SpecialEnv function to mock sleep, for either some number of microseconds or seconds depending on the function called. But to call one of these, the test must first call SetMockSleep (precondition enforced with assertion), which also turns sleeps in RocksDB into mock sleeps. To also removes accounting for actual clock time, call SetTimeElapseOnlySleepOnReopen, which implies SetMockSleep (on DB re-open). This latter setting only works by applying on DB re-open, otherwise havoc can ensue if Env goes back in time with DB open. More specifics: Removed some unused test classes, and updated comments on the general problem. Fixed DBSSTTest.GetTotalSstFilesSize using a sync point callback instead of mock time. For this we have the only modification to production code, inserting a sync point callback in flush_job.cc, which is not a change to production behavior. Removed unnecessary resetting of mock times to 0 in many tests. RocksDB deals in relative time. Any behaviors relying on absolute date/time are likely a bug. (The above test DBSSTTest.GetTotalSstFilesSize was the only one clearly injecting a specific absolute time for actual testing convenience.) Just in case I misunderstood some test, I put this note in each replacement: // NOTE: Presumed unnecessary and removed: resetting mock time in env Strengthened some tests like MergeTestTime, MergeCompactionTimeTest, and FilterCompactionTimeTest in db_test.cc stats_history_test and blob_db_test are each their own beast, rather deeply dependent on MockTimeEnv. Each gets its own variant of a work-around for TimedWait in a mock time environment. (Reduces redundancy and inconsistency in stats_history_test.) Intended follow-up: Remove TimedWait from the public API of InstrumentedCondVar, and only make that accessible through Env by passing in an InstrumentedCondVar and a deadline. Then the Env implementations mocking time can fix this problem without using sync points. (Test infrastructure using sync points interferes with individual tests' control over sync points.) With that change, we can simplify/consolidate the scattered work-arounds. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7101 Test Plan: make check on Linux and MacOS Reviewed By: zhichao-cao Differential Revision: D23032815 Pulled By: pdillinger fbshipit-source-id: 7f33967ada8b83011fb54e8279365c008bd6610b
2020-08-11 21:39:49 +02:00
SetTimeElapseOnlySleepOnReopen(&options);
options.disable_auto_compactions = true;
options.env = env_;
options.statistics = CreateDBStatistics();
int64_t rate_bytes_per_sec = 1024 * 10; // 10 Kbs / Sec
Status s;
options.sst_file_manager.reset(
NewSstFileManager(env_, nullptr, "", 0, false, &s, 0));
ASSERT_OK(s);
options.sst_file_manager->SetDeleteRateBytesPerSecond(rate_bytes_per_sec);
auto sfm = static_cast<SstFileManagerImpl*>(options.sst_file_manager.get());
sfm->delete_scheduler()->SetMaxTrashDBRatio(1.1);
WriteOptions wo;
wo.disableWAL = true;
ASSERT_OK(TryReopen(options));
// Create 4 files in L0
for (char v = 'a'; v <= 'd'; v++) {
ASSERT_OK(Put("Key2", DummyString(1024, v), wo));
ASSERT_OK(Put("Key3", DummyString(1024, v), wo));
ASSERT_OK(Put("Key4", DummyString(1024, v), wo));
ASSERT_OK(Put("Key1", DummyString(1024, v), wo));
ASSERT_OK(Put("Key4", DummyString(1024, v), wo));
ASSERT_OK(Flush());
}
// We created 4 sst files in L0
ASSERT_EQ("4", FilesPerLevel(0));
std::vector<LiveFileMetaData> metadata;
db_->GetLiveFilesMetaData(&metadata);
// Compaction will move the 4 files in L0 to trash and create 1 L1 file
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_OK(dbfull()->TEST_WaitForCompact(true));
ASSERT_EQ("0,1", FilesPerLevel(0));
uint64_t delete_start_time = env_->NowMicros();
// Hold BackgroundEmptyTrash
TEST_SYNC_POINT("DBSSTTest::RateLimitedDelete:1");
sfm->WaitForEmptyTrash();
uint64_t time_spent_deleting = env_->NowMicros() - delete_start_time;
uint64_t total_files_size = 0;
uint64_t expected_penlty = 0;
ASSERT_EQ(penalties.size(), metadata.size());
for (size_t i = 0; i < metadata.size(); i++) {
total_files_size += metadata[i].size;
expected_penlty = ((total_files_size * 1000000) / rate_bytes_per_sec);
ASSERT_EQ(expected_penlty, penalties[i]);
}
ASSERT_GT(time_spent_deleting, expected_penlty * 0.9);
ASSERT_LT(time_spent_deleting, expected_penlty * 1.1);
ASSERT_EQ(4, options.statistics->getAndResetTickerCount(FILES_MARKED_TRASH));
ASSERT_EQ(
0, options.statistics->getAndResetTickerCount(FILES_DELETED_IMMEDIATELY));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBSSTTest, RateLimitedWALDelete) {
Destroy(last_options_);
std::vector<uint64_t> penalties;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::BackgroundEmptyTrash:Wait",
[&](void* arg) { penalties.push_back(*(static_cast<uint64_t*>(arg))); });
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.compression = kNoCompression;
options.env = env_;
int64_t rate_bytes_per_sec = 1024 * 10; // 10 Kbs / Sec
Status s;
options.sst_file_manager.reset(
NewSstFileManager(env_, nullptr, "", 0, false, &s, 0));
ASSERT_OK(s);
options.sst_file_manager->SetDeleteRateBytesPerSecond(rate_bytes_per_sec);
auto sfm = static_cast<SstFileManagerImpl*>(options.sst_file_manager.get());
sfm->delete_scheduler()->SetMaxTrashDBRatio(3.1);
Fix+clean up handling of mock sleeps (#7101) Summary: We have a number of tests hanging on MacOS and windows due to mishandling of code for mock sleeps. In addition, the code was in terrible shape because the same variable (addon_time_) would sometimes refer to microseconds and sometimes to seconds. One test even assumed it was nanoseconds but was written to pass anyway. This has been cleaned up so that DB tests generally use a SpecialEnv function to mock sleep, for either some number of microseconds or seconds depending on the function called. But to call one of these, the test must first call SetMockSleep (precondition enforced with assertion), which also turns sleeps in RocksDB into mock sleeps. To also removes accounting for actual clock time, call SetTimeElapseOnlySleepOnReopen, which implies SetMockSleep (on DB re-open). This latter setting only works by applying on DB re-open, otherwise havoc can ensue if Env goes back in time with DB open. More specifics: Removed some unused test classes, and updated comments on the general problem. Fixed DBSSTTest.GetTotalSstFilesSize using a sync point callback instead of mock time. For this we have the only modification to production code, inserting a sync point callback in flush_job.cc, which is not a change to production behavior. Removed unnecessary resetting of mock times to 0 in many tests. RocksDB deals in relative time. Any behaviors relying on absolute date/time are likely a bug. (The above test DBSSTTest.GetTotalSstFilesSize was the only one clearly injecting a specific absolute time for actual testing convenience.) Just in case I misunderstood some test, I put this note in each replacement: // NOTE: Presumed unnecessary and removed: resetting mock time in env Strengthened some tests like MergeTestTime, MergeCompactionTimeTest, and FilterCompactionTimeTest in db_test.cc stats_history_test and blob_db_test are each their own beast, rather deeply dependent on MockTimeEnv. Each gets its own variant of a work-around for TimedWait in a mock time environment. (Reduces redundancy and inconsistency in stats_history_test.) Intended follow-up: Remove TimedWait from the public API of InstrumentedCondVar, and only make that accessible through Env by passing in an InstrumentedCondVar and a deadline. Then the Env implementations mocking time can fix this problem without using sync points. (Test infrastructure using sync points interferes with individual tests' control over sync points.) With that change, we can simplify/consolidate the scattered work-arounds. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7101 Test Plan: make check on Linux and MacOS Reviewed By: zhichao-cao Differential Revision: D23032815 Pulled By: pdillinger fbshipit-source-id: 7f33967ada8b83011fb54e8279365c008bd6610b
2020-08-11 21:39:49 +02:00
SetTimeElapseOnlySleepOnReopen(&options);
ASSERT_OK(TryReopen(options));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
// Create 4 files in L0
for (char v = 'a'; v <= 'd'; v++) {
ASSERT_OK(Put("Key2", DummyString(1024, v)));
ASSERT_OK(Put("Key3", DummyString(1024, v)));
ASSERT_OK(Put("Key4", DummyString(1024, v)));
ASSERT_OK(Put("Key1", DummyString(1024, v)));
ASSERT_OK(Put("Key4", DummyString(1024, v)));
ASSERT_OK(Flush());
}
// We created 4 sst files in L0
ASSERT_EQ("4", FilesPerLevel(0));
// Compaction will move the 4 files in L0 to trash and create 1 L1 file
CompactRangeOptions cro;
cro.bottommost_level_compaction = BottommostLevelCompaction::kForce;
ASSERT_OK(db_->CompactRange(cro, nullptr, nullptr));
ASSERT_OK(dbfull()->TEST_WaitForCompact(true));
ASSERT_EQ("0,1", FilesPerLevel(0));
sfm->WaitForEmptyTrash();
ASSERT_EQ(penalties.size(), 8);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
class DBWALTestWithParam
: public DBSSTTest,
public testing::WithParamInterface<std::tuple<std::string, bool>> {
public:
DBWALTestWithParam() {
wal_dir_ = std::get<0>(GetParam());
wal_dir_same_as_dbname_ = std::get<1>(GetParam());
}
std::string wal_dir_;
bool wal_dir_same_as_dbname_;
};
TEST_P(DBWALTestWithParam, WALTrashCleanupOnOpen) {
class MyEnv : public EnvWrapper {
public:
MyEnv(Env* t) : EnvWrapper(t), fake_log_delete(false) {}
Status DeleteFile(const std::string& fname) {
if (fname.find(".log.trash") != std::string::npos && fake_log_delete) {
return Status::OK();
}
return target()->DeleteFile(fname);
}
void set_fake_log_delete(bool fake) { fake_log_delete = fake; }
private:
bool fake_log_delete;
};
std::unique_ptr<MyEnv> env(new MyEnv(Env::Default()));
Destroy(last_options_);
env->set_fake_log_delete(true);
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.compression = kNoCompression;
options.env = env.get();
options.wal_dir = dbname_ + wal_dir_;
int64_t rate_bytes_per_sec = 1024 * 10; // 10 Kbs / Sec
Status s;
options.sst_file_manager.reset(
NewSstFileManager(env_, nullptr, "", 0, false, &s, 0));
ASSERT_OK(s);
options.sst_file_manager->SetDeleteRateBytesPerSecond(rate_bytes_per_sec);
auto sfm = static_cast<SstFileManagerImpl*>(options.sst_file_manager.get());
sfm->delete_scheduler()->SetMaxTrashDBRatio(3.1);
ASSERT_OK(TryReopen(options));
// Create 4 files in L0
for (char v = 'a'; v <= 'd'; v++) {
ASSERT_OK(Put("Key2", DummyString(1024, v)));
ASSERT_OK(Put("Key3", DummyString(1024, v)));
ASSERT_OK(Put("Key4", DummyString(1024, v)));
ASSERT_OK(Put("Key1", DummyString(1024, v)));
ASSERT_OK(Put("Key4", DummyString(1024, v)));
ASSERT_OK(Flush());
}
// We created 4 sst files in L0
ASSERT_EQ("4", FilesPerLevel(0));
Close();
options.sst_file_manager.reset();
std::vector<std::string> filenames;
int trash_log_count = 0;
if (!wal_dir_same_as_dbname_) {
// Forcibly create some trash log files
std::unique_ptr<WritableFile> result;
env->NewWritableFile(options.wal_dir + "/1000.log.trash", &result,
EnvOptions());
result.reset();
}
env->GetChildren(options.wal_dir, &filenames);
for (const std::string& fname : filenames) {
if (fname.find(".log.trash") != std::string::npos) {
trash_log_count++;
}
}
ASSERT_GE(trash_log_count, 1);
env->set_fake_log_delete(false);
ASSERT_OK(TryReopen(options));
filenames.clear();
trash_log_count = 0;
env->GetChildren(options.wal_dir, &filenames);
for (const std::string& fname : filenames) {
if (fname.find(".log.trash") != std::string::npos) {
trash_log_count++;
}
}
ASSERT_EQ(trash_log_count, 0);
Close();
}
INSTANTIATE_TEST_CASE_P(DBWALTestWithParam, DBWALTestWithParam,
::testing::Values(std::make_tuple("", true),
std::make_tuple("_wal_dir", false)));
TEST_F(DBSSTTest, OpenDBWithExistingTrash) {
Options options = CurrentOptions();
options.sst_file_manager.reset(
NewSstFileManager(env_, nullptr, "", 1024 * 1024 /* 1 MB/sec */));
auto sfm = static_cast<SstFileManagerImpl*>(options.sst_file_manager.get());
Destroy(last_options_);
// Add some trash files to the db directory so the DB can clean them up
env_->CreateDirIfMissing(dbname_);
ASSERT_OK(WriteStringToFile(env_, "abc", dbname_ + "/" + "001.sst.trash"));
ASSERT_OK(WriteStringToFile(env_, "abc", dbname_ + "/" + "002.sst.trash"));
ASSERT_OK(WriteStringToFile(env_, "abc", dbname_ + "/" + "003.sst.trash"));
// Reopen the DB and verify that it deletes existing trash files
ASSERT_OK(TryReopen(options));
sfm->WaitForEmptyTrash();
ASSERT_NOK(env_->FileExists(dbname_ + "/" + "001.sst.trash"));
ASSERT_NOK(env_->FileExists(dbname_ + "/" + "002.sst.trash"));
ASSERT_NOK(env_->FileExists(dbname_ + "/" + "003.sst.trash"));
}
// Create a DB with 2 db_paths, and generate multiple files in the 2
// db_paths using CompactRangeOptions, make sure that files that were
// deleted from first db_path were deleted using DeleteScheduler and
// files in the second path were not.
TEST_F(DBSSTTest, DeleteSchedulerMultipleDBPaths) {
std::atomic<int> bg_delete_file(0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteTrashFile:DeleteFile",
[&](void* /*arg*/) { bg_delete_file++; });
// The deletion scheduler sometimes skips marking file as trash according to
// a heuristic. In that case the deletion will go through the below SyncPoint.
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteFile", [&](void* /*arg*/) { bg_delete_file++; });
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.db_paths.emplace_back(dbname_, 1024 * 100);
options.db_paths.emplace_back(dbname_ + "_2", 1024 * 100);
options.env = env_;
int64_t rate_bytes_per_sec = 1024 * 1024; // 1 Mb / Sec
Status s;
options.sst_file_manager.reset(
NewSstFileManager(env_, nullptr, "", rate_bytes_per_sec, false, &s,
/* max_trash_db_ratio= */ 1.1));
ASSERT_OK(s);
auto sfm = static_cast<SstFileManagerImpl*>(options.sst_file_manager.get());
DestroyAndReopen(options);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
WriteOptions wo;
wo.disableWAL = true;
// Create 4 files in L0
for (int i = 0; i < 4; i++) {
ASSERT_OK(Put("Key" + ToString(i), DummyString(1024, 'A'), wo));
ASSERT_OK(Flush());
}
// We created 4 sst files in L0
ASSERT_EQ("4", FilesPerLevel(0));
// Compaction will delete files from L0 in first db path and generate a new
// file in L1 in second db path
CompactRangeOptions compact_options;
compact_options.target_path_id = 1;
Slice begin("Key0");
Slice end("Key3");
ASSERT_OK(db_->CompactRange(compact_options, &begin, &end));
ASSERT_EQ("0,1", FilesPerLevel(0));
// Create 4 files in L0
for (int i = 4; i < 8; i++) {
ASSERT_OK(Put("Key" + ToString(i), DummyString(1024, 'B'), wo));
ASSERT_OK(Flush());
}
ASSERT_EQ("4,1", FilesPerLevel(0));
// Compaction will delete files from L0 in first db path and generate a new
// file in L1 in second db path
begin = "Key4";
end = "Key7";
ASSERT_OK(db_->CompactRange(compact_options, &begin, &end));
ASSERT_EQ("0,2", FilesPerLevel(0));
sfm->WaitForEmptyTrash();
ASSERT_EQ(bg_delete_file, 8);
// Compaction will delete both files and regenerate a file in L1 in second
// db path. The deleted files should still be cleaned up via delete scheduler.
compact_options.bottommost_level_compaction =
BottommostLevelCompaction::kForceOptimized;
ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
ASSERT_EQ("0,1", FilesPerLevel(0));
sfm->WaitForEmptyTrash();
ASSERT_EQ(bg_delete_file, 10);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBSSTTest, DestroyDBWithRateLimitedDelete) {
int bg_delete_file = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DeleteScheduler::DeleteTrashFile:DeleteFile",
[&](void* /*arg*/) { bg_delete_file++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Status s;
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.env = env_;
options.sst_file_manager.reset(
NewSstFileManager(env_, nullptr, "", 0, false, &s, 0));
ASSERT_OK(s);
DestroyAndReopen(options);
// Create 4 files in L0
for (int i = 0; i < 4; i++) {
ASSERT_OK(Put("Key" + ToString(i), DummyString(1024, 'A')));
ASSERT_OK(Flush());
}
// We created 4 sst files in L0
ASSERT_EQ("4", FilesPerLevel(0));
// Close DB and destroy it using DeleteScheduler
Close();
int num_sst_files = 0;
int num_wal_files = 0;
std::vector<std::string> db_files;
env_->GetChildren(dbname_, &db_files);
for (std::string f : db_files) {
if (f.substr(f.find_last_of(".") + 1) == "sst") {
num_sst_files++;
} else if (f.substr(f.find_last_of(".") + 1) == "log") {
num_wal_files++;
}
}
ASSERT_GT(num_sst_files, 0);
ASSERT_GT(num_wal_files, 0);
auto sfm = static_cast<SstFileManagerImpl*>(options.sst_file_manager.get());
sfm->SetDeleteRateBytesPerSecond(1024 * 1024);
sfm->delete_scheduler()->SetMaxTrashDBRatio(1.1);
ASSERT_OK(DestroyDB(dbname_, options));
sfm->WaitForEmptyTrash();
ASSERT_EQ(bg_delete_file, num_sst_files + num_wal_files);
}
TEST_F(DBSSTTest, DBWithMaxSpaceAllowed) {
std::shared_ptr<SstFileManager> sst_file_manager(NewSstFileManager(env_));
auto sfm = static_cast<SstFileManagerImpl*>(sst_file_manager.get());
Options options = CurrentOptions();
options.sst_file_manager = sst_file_manager;
options.disable_auto_compactions = true;
DestroyAndReopen(options);
Random rnd(301);
// Generate a file containing 100 keys.
for (int i = 0; i < 100; i++) {
ASSERT_OK(Put(Key(i), rnd.RandomString(50)));
}
ASSERT_OK(Flush());
uint64_t first_file_size = 0;
std::unordered_map<std::string, uint64_t> files_in_db;
ASSERT_OK(GetAllSSTFiles(&files_in_db, &first_file_size));
ASSERT_EQ(sfm->GetTotalSize(), first_file_size);
// Set the maximum allowed space usage to the current total size
sfm->SetMaxAllowedSpaceUsage(first_file_size + 1);
ASSERT_OK(Put("key1", "val1"));
// This flush will cause bg_error_ and will fail
ASSERT_NOK(Flush());
}
TEST_F(DBSSTTest, CancellingCompactionsWorks) {
std::shared_ptr<SstFileManager> sst_file_manager(NewSstFileManager(env_));
auto sfm = static_cast<SstFileManagerImpl*>(sst_file_manager.get());
Options options = CurrentOptions();
options.sst_file_manager = sst_file_manager;
options.level0_file_num_compaction_trigger = 2;
options.statistics = CreateDBStatistics();
DestroyAndReopen(options);
int completed_compactions = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction():CancelledCompaction", [&](void* /*arg*/) {
sfm->SetMaxAllowedSpaceUsage(0);
ASSERT_EQ(sfm->GetCompactionsReservedSize(), 0);
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial:AfterRun",
[&](void* /*arg*/) { completed_compactions++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Random rnd(301);
// Generate a file containing 10 keys.
for (int i = 0; i < 10; i++) {
ASSERT_OK(Put(Key(i), rnd.RandomString(50)));
}
ASSERT_OK(Flush());
uint64_t total_file_size = 0;
std::unordered_map<std::string, uint64_t> files_in_db;
ASSERT_OK(GetAllSSTFiles(&files_in_db, &total_file_size));
// Set the maximum allowed space usage to the current total size
sfm->SetMaxAllowedSpaceUsage(2 * total_file_size + 1);
// Generate another file to trigger compaction.
for (int i = 0; i < 10; i++) {
ASSERT_OK(Put(Key(i), rnd.RandomString(50)));
}
ASSERT_OK(Flush());
dbfull()->TEST_WaitForCompact(true);
// Because we set a callback in CancelledCompaction, we actually
// let the compaction run
ASSERT_GT(completed_compactions, 0);
ASSERT_EQ(sfm->GetCompactionsReservedSize(), 0);
// Make sure the stat is bumped
ASSERT_GT(dbfull()->immutable_db_options().statistics.get()->getTickerCount(COMPACTION_CANCELLED), 0);
ASSERT_EQ(0,
dbfull()->immutable_db_options().statistics.get()->getTickerCount(
FILES_MARKED_TRASH));
ASSERT_EQ(4,
dbfull()->immutable_db_options().statistics.get()->getTickerCount(
FILES_DELETED_IMMEDIATELY));
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBSSTTest, CancellingManualCompactionsWorks) {
std::shared_ptr<SstFileManager> sst_file_manager(NewSstFileManager(env_));
auto sfm = static_cast<SstFileManagerImpl*>(sst_file_manager.get());
Options options = CurrentOptions();
options.sst_file_manager = sst_file_manager;
options.statistics = CreateDBStatistics();
FlushedFileCollector* collector = new FlushedFileCollector();
options.listeners.emplace_back(collector);
DestroyAndReopen(options);
Random rnd(301);
// Generate a file containing 10 keys.
for (int i = 0; i < 10; i++) {
ASSERT_OK(Put(Key(i), rnd.RandomString(50)));
}
ASSERT_OK(Flush());
uint64_t total_file_size = 0;
std::unordered_map<std::string, uint64_t> files_in_db;
ASSERT_OK(GetAllSSTFiles(&files_in_db, &total_file_size));
// Set the maximum allowed space usage to the current total size
sfm->SetMaxAllowedSpaceUsage(2 * total_file_size + 1);
// Generate another file to trigger compaction.
for (int i = 0; i < 10; i++) {
ASSERT_OK(Put(Key(i), rnd.RandomString(50)));
}
ASSERT_OK(Flush());
// OK, now trigger a manual compaction
dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr);
// Wait for manual compaction to get scheduled and finish
dbfull()->TEST_WaitForCompact(true);
ASSERT_EQ(sfm->GetCompactionsReservedSize(), 0);
// Make sure the stat is bumped
ASSERT_EQ(dbfull()->immutable_db_options().statistics.get()->getTickerCount(
COMPACTION_CANCELLED),
1);
// Now make sure CompactFiles also gets cancelled
auto l0_files = collector->GetFlushedFiles();
dbfull()->CompactFiles(ROCKSDB_NAMESPACE::CompactionOptions(), l0_files, 0);
// Wait for manual compaction to get scheduled and finish
dbfull()->TEST_WaitForCompact(true);
ASSERT_EQ(dbfull()->immutable_db_options().statistics.get()->getTickerCount(
COMPACTION_CANCELLED),
2);
ASSERT_EQ(sfm->GetCompactionsReservedSize(), 0);
// Now let the flush through and make sure GetCompactionsReservedSize
// returns to normal
sfm->SetMaxAllowedSpaceUsage(0);
int completed_compactions = 0;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"CompactFilesImpl:End", [&](void* /*arg*/) { completed_compactions++; });
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
dbfull()->CompactFiles(ROCKSDB_NAMESPACE::CompactionOptions(), l0_files, 0);
dbfull()->TEST_WaitForCompact(true);
ASSERT_EQ(sfm->GetCompactionsReservedSize(), 0);
ASSERT_GT(completed_compactions, 0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBSSTTest, DBWithMaxSpaceAllowedRandomized) {
// This test will set a maximum allowed space for the DB, then it will
// keep filling the DB until the limit is reached and bg_error_ is set.
// When bg_error_ is set we will verify that the DB size is greater
// than the limit.
std::vector<int> max_space_limits_mbs = {1, 10};
std::atomic<bool> bg_error_set(false);
std::atomic<int> reached_max_space_on_flush(0);
std::atomic<int> reached_max_space_on_compaction(0);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::FlushMemTableToOutputFile:MaxAllowedSpaceReached",
[&](void* arg) {
Status* bg_error = static_cast<Status*>(arg);
bg_error_set = true;
reached_max_space_on_flush++;
// clear error to ensure compaction callback is called
*bg_error = Status::OK();
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction():CancelledCompaction", [&](void* arg) {
bool* enough_room = static_cast<bool*>(arg);
*enough_room = true;
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"CompactionJob::FinishCompactionOutputFile:MaxAllowedSpaceReached",
[&](void* /*arg*/) {
bg_error_set = true;
reached_max_space_on_compaction++;
});
for (auto limit_mb : max_space_limits_mbs) {
bg_error_set = false;
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->ClearTrace();
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
std::shared_ptr<SstFileManager> sst_file_manager(NewSstFileManager(env_));
auto sfm = static_cast<SstFileManagerImpl*>(sst_file_manager.get());
Options options = CurrentOptions();
options.sst_file_manager = sst_file_manager;
options.write_buffer_size = 1024 * 512; // 512 Kb
DestroyAndReopen(options);
Random rnd(301);
sfm->SetMaxAllowedSpaceUsage(limit_mb * 1024 * 1024);
// It is easy to detect if the test is stuck in a loop. No need for
// complex termination logic.
while (true) {
auto s = Put(rnd.RandomString(10), rnd.RandomString(50));
if (!s.ok()) {
break;
}
}
ASSERT_TRUE(bg_error_set);
uint64_t total_sst_files_size = 0;
std::unordered_map<std::string, uint64_t> files_in_db;
ASSERT_OK(GetAllSSTFiles(&files_in_db, &total_sst_files_size));
ASSERT_GE(total_sst_files_size, limit_mb * 1024 * 1024);
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
ASSERT_GT(reached_max_space_on_flush, 0);
ASSERT_GT(reached_max_space_on_compaction, 0);
}
TEST_F(DBSSTTest, OpenDBWithInfiniteMaxOpenFiles) {
// Open DB with infinite max open files
// - First iteration use 1 thread to open files
// - Second iteration use 5 threads to open files
for (int iter = 0; iter < 2; iter++) {
Options options;
options.create_if_missing = true;
options.write_buffer_size = 100000;
options.disable_auto_compactions = true;
options.max_open_files = -1;
if (iter == 0) {
options.max_file_opening_threads = 1;
} else {
options.max_file_opening_threads = 5;
}
options = CurrentOptions(options);
DestroyAndReopen(options);
// Create 12 Files in L0 (then move then to L2)
for (int i = 0; i < 12; i++) {
std::string k = "L2_" + Key(i);
ASSERT_OK(Put(k, k + std::string(1000, 'a')));
ASSERT_OK(Flush());
}
CompactRangeOptions compact_options;
compact_options.change_level = true;
compact_options.target_level = 2;
db_->CompactRange(compact_options, nullptr, nullptr);
// Create 12 Files in L0
for (int i = 0; i < 12; i++) {
std::string k = "L0_" + Key(i);
ASSERT_OK(Put(k, k + std::string(1000, 'a')));
ASSERT_OK(Flush());
}
Close();
// Reopening the DB will load all existing files
Reopen(options);
ASSERT_EQ("12,0,12", FilesPerLevel(0));
std::vector<std::vector<FileMetaData>> files;
dbfull()->TEST_GetFilesMetaData(db_->DefaultColumnFamily(), &files);
for (const auto& level : files) {
for (const auto& file : level) {
ASSERT_TRUE(file.table_reader_handle != nullptr);
}
}
for (int i = 0; i < 12; i++) {
ASSERT_EQ(Get("L0_" + Key(i)), "L0_" + Key(i) + std::string(1000, 'a'));
ASSERT_EQ(Get("L2_" + Key(i)), "L2_" + Key(i) + std::string(1000, 'a'));
}
}
}
TEST_F(DBSSTTest, GetTotalSstFilesSize) {
// We don't propagate oldest-key-time table property on compaction and
// just write 0 as default value. This affect the exact table size, since
// we encode table properties as varint64. Force time to be 0 to work around
// it. Should remove the workaround after we propagate the property on
// compaction.
Fix+clean up handling of mock sleeps (#7101) Summary: We have a number of tests hanging on MacOS and windows due to mishandling of code for mock sleeps. In addition, the code was in terrible shape because the same variable (addon_time_) would sometimes refer to microseconds and sometimes to seconds. One test even assumed it was nanoseconds but was written to pass anyway. This has been cleaned up so that DB tests generally use a SpecialEnv function to mock sleep, for either some number of microseconds or seconds depending on the function called. But to call one of these, the test must first call SetMockSleep (precondition enforced with assertion), which also turns sleeps in RocksDB into mock sleeps. To also removes accounting for actual clock time, call SetTimeElapseOnlySleepOnReopen, which implies SetMockSleep (on DB re-open). This latter setting only works by applying on DB re-open, otherwise havoc can ensue if Env goes back in time with DB open. More specifics: Removed some unused test classes, and updated comments on the general problem. Fixed DBSSTTest.GetTotalSstFilesSize using a sync point callback instead of mock time. For this we have the only modification to production code, inserting a sync point callback in flush_job.cc, which is not a change to production behavior. Removed unnecessary resetting of mock times to 0 in many tests. RocksDB deals in relative time. Any behaviors relying on absolute date/time are likely a bug. (The above test DBSSTTest.GetTotalSstFilesSize was the only one clearly injecting a specific absolute time for actual testing convenience.) Just in case I misunderstood some test, I put this note in each replacement: // NOTE: Presumed unnecessary and removed: resetting mock time in env Strengthened some tests like MergeTestTime, MergeCompactionTimeTest, and FilterCompactionTimeTest in db_test.cc stats_history_test and blob_db_test are each their own beast, rather deeply dependent on MockTimeEnv. Each gets its own variant of a work-around for TimedWait in a mock time environment. (Reduces redundancy and inconsistency in stats_history_test.) Intended follow-up: Remove TimedWait from the public API of InstrumentedCondVar, and only make that accessible through Env by passing in an InstrumentedCondVar and a deadline. Then the Env implementations mocking time can fix this problem without using sync points. (Test infrastructure using sync points interferes with individual tests' control over sync points.) With that change, we can simplify/consolidate the scattered work-arounds. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7101 Test Plan: make check on Linux and MacOS Reviewed By: zhichao-cao Differential Revision: D23032815 Pulled By: pdillinger fbshipit-source-id: 7f33967ada8b83011fb54e8279365c008bd6610b
2020-08-11 21:39:49 +02:00
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
"FlushJob::WriteLevel0Table:oldest_ancester_time", [&](void* arg) {
uint64_t* current_time = static_cast<uint64_t*>(arg);
*current_time = 0;
});
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.compression = kNoCompression;
DestroyAndReopen(options);
// Generate 5 files in L0
for (int i = 0; i < 5; i++) {
for (int j = 0; j < 10; j++) {
std::string val = "val_file_" + ToString(i);
ASSERT_OK(Put(Key(j), val));
}
Flush();
}
ASSERT_EQ("5", FilesPerLevel(0));
std::vector<LiveFileMetaData> live_files_meta;
dbfull()->GetLiveFilesMetaData(&live_files_meta);
ASSERT_EQ(live_files_meta.size(), 5);
uint64_t single_file_size = live_files_meta[0].size;
uint64_t live_sst_files_size = 0;
uint64_t total_sst_files_size = 0;
for (const auto& file_meta : live_files_meta) {
live_sst_files_size += file_meta.size;
}
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 5
// Total SST files = 5
ASSERT_EQ(live_sst_files_size, 5 * single_file_size);
ASSERT_EQ(total_sst_files_size, 5 * single_file_size);
// hold current version
std::unique_ptr<Iterator> iter1(dbfull()->NewIterator(ReadOptions()));
// Compact 5 files into 1 file in L0
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("0,1", FilesPerLevel(0));
live_files_meta.clear();
dbfull()->GetLiveFilesMetaData(&live_files_meta);
ASSERT_EQ(live_files_meta.size(), 1);
live_sst_files_size = 0;
total_sst_files_size = 0;
for (const auto& file_meta : live_files_meta) {
live_sst_files_size += file_meta.size;
}
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 1 (compacted file)
// Total SST files = 6 (5 original files + compacted file)
ASSERT_EQ(live_sst_files_size, 1 * single_file_size);
ASSERT_EQ(total_sst_files_size, 6 * single_file_size);
// hold current version
std::unique_ptr<Iterator> iter2(dbfull()->NewIterator(ReadOptions()));
// Delete all keys and compact, this will delete all live files
for (int i = 0; i < 10; i++) {
ASSERT_OK(Delete(Key(i)));
}
Flush();
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("", FilesPerLevel(0));
live_files_meta.clear();
dbfull()->GetLiveFilesMetaData(&live_files_meta);
ASSERT_EQ(live_files_meta.size(), 0);
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 0
// Total SST files = 6 (5 original files + compacted file)
ASSERT_EQ(total_sst_files_size, 6 * single_file_size);
iter1.reset();
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 0
// Total SST files = 1 (compacted file)
ASSERT_EQ(total_sst_files_size, 1 * single_file_size);
iter2.reset();
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 0
// Total SST files = 0
ASSERT_EQ(total_sst_files_size, 0);
Fix+clean up handling of mock sleeps (#7101) Summary: We have a number of tests hanging on MacOS and windows due to mishandling of code for mock sleeps. In addition, the code was in terrible shape because the same variable (addon_time_) would sometimes refer to microseconds and sometimes to seconds. One test even assumed it was nanoseconds but was written to pass anyway. This has been cleaned up so that DB tests generally use a SpecialEnv function to mock sleep, for either some number of microseconds or seconds depending on the function called. But to call one of these, the test must first call SetMockSleep (precondition enforced with assertion), which also turns sleeps in RocksDB into mock sleeps. To also removes accounting for actual clock time, call SetTimeElapseOnlySleepOnReopen, which implies SetMockSleep (on DB re-open). This latter setting only works by applying on DB re-open, otherwise havoc can ensue if Env goes back in time with DB open. More specifics: Removed some unused test classes, and updated comments on the general problem. Fixed DBSSTTest.GetTotalSstFilesSize using a sync point callback instead of mock time. For this we have the only modification to production code, inserting a sync point callback in flush_job.cc, which is not a change to production behavior. Removed unnecessary resetting of mock times to 0 in many tests. RocksDB deals in relative time. Any behaviors relying on absolute date/time are likely a bug. (The above test DBSSTTest.GetTotalSstFilesSize was the only one clearly injecting a specific absolute time for actual testing convenience.) Just in case I misunderstood some test, I put this note in each replacement: // NOTE: Presumed unnecessary and removed: resetting mock time in env Strengthened some tests like MergeTestTime, MergeCompactionTimeTest, and FilterCompactionTimeTest in db_test.cc stats_history_test and blob_db_test are each their own beast, rather deeply dependent on MockTimeEnv. Each gets its own variant of a work-around for TimedWait in a mock time environment. (Reduces redundancy and inconsistency in stats_history_test.) Intended follow-up: Remove TimedWait from the public API of InstrumentedCondVar, and only make that accessible through Env by passing in an InstrumentedCondVar and a deadline. Then the Env implementations mocking time can fix this problem without using sync points. (Test infrastructure using sync points interferes with individual tests' control over sync points.) With that change, we can simplify/consolidate the scattered work-arounds. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7101 Test Plan: make check on Linux and MacOS Reviewed By: zhichao-cao Differential Revision: D23032815 Pulled By: pdillinger fbshipit-source-id: 7f33967ada8b83011fb54e8279365c008bd6610b
2020-08-11 21:39:49 +02:00
ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBSSTTest, GetTotalSstFilesSizeVersionsFilesShared) {
Options options = CurrentOptions();
options.disable_auto_compactions = true;
options.compression = kNoCompression;
DestroyAndReopen(options);
// Generate 5 files in L0
for (int i = 0; i < 5; i++) {
ASSERT_OK(Put(Key(i), "val"));
Flush();
}
ASSERT_EQ("5", FilesPerLevel(0));
std::vector<LiveFileMetaData> live_files_meta;
dbfull()->GetLiveFilesMetaData(&live_files_meta);
ASSERT_EQ(live_files_meta.size(), 5);
uint64_t single_file_size = live_files_meta[0].size;
uint64_t live_sst_files_size = 0;
uint64_t total_sst_files_size = 0;
for (const auto& file_meta : live_files_meta) {
live_sst_files_size += file_meta.size;
}
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 5
// Total SST files = 5
ASSERT_EQ(live_sst_files_size, 5 * single_file_size);
ASSERT_EQ(total_sst_files_size, 5 * single_file_size);
// hold current version
std::unique_ptr<Iterator> iter1(dbfull()->NewIterator(ReadOptions()));
// Compaction will do trivial move from L0 to L1
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("0,5", FilesPerLevel(0));
live_files_meta.clear();
dbfull()->GetLiveFilesMetaData(&live_files_meta);
ASSERT_EQ(live_files_meta.size(), 5);
live_sst_files_size = 0;
total_sst_files_size = 0;
for (const auto& file_meta : live_files_meta) {
live_sst_files_size += file_meta.size;
}
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 5
// Total SST files = 5 (used in 2 version)
ASSERT_EQ(live_sst_files_size, 5 * single_file_size);
ASSERT_EQ(total_sst_files_size, 5 * single_file_size);
// hold current version
std::unique_ptr<Iterator> iter2(dbfull()->NewIterator(ReadOptions()));
// Delete all keys and compact, this will delete all live files
for (int i = 0; i < 5; i++) {
ASSERT_OK(Delete(Key(i)));
}
Flush();
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr));
ASSERT_EQ("", FilesPerLevel(0));
live_files_meta.clear();
dbfull()->GetLiveFilesMetaData(&live_files_meta);
ASSERT_EQ(live_files_meta.size(), 0);
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 0
// Total SST files = 5 (used in 2 version)
ASSERT_EQ(total_sst_files_size, 5 * single_file_size);
iter1.reset();
iter2.reset();
ASSERT_TRUE(dbfull()->GetIntProperty("rocksdb.total-sst-files-size",
&total_sst_files_size));
// Live SST files = 0
// Total SST files = 0
ASSERT_EQ(total_sst_files_size, 0);
}
#endif // ROCKSDB_LITE
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}