Revision d4ad32d7bd908d0b065c04ed697c5c157cd4512d authored by Maysam Yabandeh on 13 July 2018, 00:19:57 UTC, committed by Facebook Github Bot on 13 July 2018, 00:27:31 UTC
Summary: BlockIter is getting crowded including details that specific only to either index or data blocks. The patch moves down such details to DataBlockIter and IndexBlockIter, both inheriting from BlockIter. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4121 Differential Revision: D8816832 Pulled By: maysamyabandeh fbshipit-source-id: d492e74155c11d8a0c1c85cd7ee33d24c7456197
1 parent 6390443
compact_files_test.cc
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#ifndef ROCKSDB_LITE
#include <mutex>
#include <string>
#include <thread>
#include <vector>
#include "db/db_impl.h"
#include "port/port.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "util/string_util.h"
#include "util/sync_point.h"
#include "util/testharness.h"
namespace rocksdb {
class CompactFilesTest : public testing::Test {
public:
CompactFilesTest() {
env_ = Env::Default();
db_name_ = test::TmpDir(env_) + "/compact_files_test";
}
std::string db_name_;
Env* env_;
};
// A class which remembers the name of each flushed file.
class FlushedFileCollector : public EventListener {
public:
FlushedFileCollector() {}
~FlushedFileCollector() {}
virtual 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_;
};
TEST_F(CompactFilesTest, L0ConflictsFiles) {
Options options;
// to trigger compaction more easily
const int kWriteBufferSize = 10000;
const int kLevel0Trigger = 2;
options.create_if_missing = true;
options.compaction_style = kCompactionStyleLevel;
// Small slowdown and stop trigger for experimental purpose.
options.level0_slowdown_writes_trigger = 20;
options.level0_stop_writes_trigger = 20;
options.level0_stop_writes_trigger = 20;
options.write_buffer_size = kWriteBufferSize;
options.level0_file_num_compaction_trigger = kLevel0Trigger;
options.compression = kNoCompression;
DB* db = nullptr;
DestroyDB(db_name_, options);
Status s = DB::Open(options, db_name_, &db);
assert(s.ok());
assert(db);
rocksdb::SyncPoint::GetInstance()->LoadDependency({
{"CompactFilesImpl:0", "BackgroundCallCompaction:0"},
{"BackgroundCallCompaction:1", "CompactFilesImpl:1"},
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
// create couple files
// Background compaction starts and waits in BackgroundCallCompaction:0
for (int i = 0; i < kLevel0Trigger * 4; ++i) {
db->Put(WriteOptions(), ToString(i), "");
db->Put(WriteOptions(), ToString(100 - i), "");
db->Flush(FlushOptions());
}
rocksdb::ColumnFamilyMetaData meta;
db->GetColumnFamilyMetaData(&meta);
std::string file1;
for (auto& file : meta.levels[0].files) {
ASSERT_EQ(0, meta.levels[0].level);
if (file1 == "") {
file1 = file.db_path + "/" + file.name;
} else {
std::string file2 = file.db_path + "/" + file.name;
// Another thread starts a compact files and creates an L0 compaction
// The background compaction then notices that there is an L0 compaction
// already in progress and doesn't do an L0 compaction
// Once the background compaction finishes, the compact files finishes
ASSERT_OK(
db->CompactFiles(rocksdb::CompactionOptions(), {file1, file2}, 0));
break;
}
}
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
delete db;
}
TEST_F(CompactFilesTest, ObsoleteFiles) {
Options options;
// to trigger compaction more easily
const int kWriteBufferSize = 65536;
options.create_if_missing = true;
// Disable RocksDB background compaction.
options.compaction_style = kCompactionStyleNone;
options.level0_slowdown_writes_trigger = (1 << 30);
options.level0_stop_writes_trigger = (1 << 30);
options.write_buffer_size = kWriteBufferSize;
options.max_write_buffer_number = 2;
options.compression = kNoCompression;
// Add listener
FlushedFileCollector* collector = new FlushedFileCollector();
options.listeners.emplace_back(collector);
DB* db = nullptr;
DestroyDB(db_name_, options);
Status s = DB::Open(options, db_name_, &db);
assert(s.ok());
assert(db);
// create couple files
for (int i = 1000; i < 2000; ++i) {
db->Put(WriteOptions(), ToString(i),
std::string(kWriteBufferSize / 10, 'a' + (i % 26)));
}
auto l0_files = collector->GetFlushedFiles();
ASSERT_OK(db->CompactFiles(CompactionOptions(), l0_files, 1));
reinterpret_cast<DBImpl*>(db)->TEST_WaitForCompact();
// verify all compaction input files are deleted
for (auto fname : l0_files) {
ASSERT_EQ(Status::NotFound(), env_->FileExists(fname));
}
delete db;
}
TEST_F(CompactFilesTest, NotCutOutputOnLevel0) {
Options options;
options.create_if_missing = true;
// Disable RocksDB background compaction.
options.compaction_style = kCompactionStyleNone;
options.level0_slowdown_writes_trigger = 1000;
options.level0_stop_writes_trigger = 1000;
options.write_buffer_size = 65536;
options.max_write_buffer_number = 2;
options.compression = kNoCompression;
options.max_compaction_bytes = 5000;
// Add listener
FlushedFileCollector* collector = new FlushedFileCollector();
options.listeners.emplace_back(collector);
DB* db = nullptr;
DestroyDB(db_name_, options);
Status s = DB::Open(options, db_name_, &db);
assert(s.ok());
assert(db);
// create couple files
for (int i = 0; i < 500; ++i) {
db->Put(WriteOptions(), ToString(i), std::string(1000, 'a' + (i % 26)));
}
reinterpret_cast<DBImpl*>(db)->TEST_WaitForFlushMemTable();
auto l0_files_1 = collector->GetFlushedFiles();
collector->ClearFlushedFiles();
for (int i = 0; i < 500; ++i) {
db->Put(WriteOptions(), ToString(i), std::string(1000, 'a' + (i % 26)));
}
reinterpret_cast<DBImpl*>(db)->TEST_WaitForFlushMemTable();
auto l0_files_2 = collector->GetFlushedFiles();
ASSERT_OK(db->CompactFiles(CompactionOptions(), l0_files_1, 0));
ASSERT_OK(db->CompactFiles(CompactionOptions(), l0_files_2, 0));
// no assertion failure
delete db;
}
TEST_F(CompactFilesTest, CapturingPendingFiles) {
Options options;
options.create_if_missing = true;
// Disable RocksDB background compaction.
options.compaction_style = kCompactionStyleNone;
// Always do full scans for obsolete files (needed to reproduce the issue).
options.delete_obsolete_files_period_micros = 0;
// Add listener.
FlushedFileCollector* collector = new FlushedFileCollector();
options.listeners.emplace_back(collector);
DB* db = nullptr;
DestroyDB(db_name_, options);
Status s = DB::Open(options, db_name_, &db);
assert(s.ok());
assert(db);
// Create 5 files.
for (int i = 0; i < 5; ++i) {
db->Put(WriteOptions(), "key" + ToString(i), "value");
db->Flush(FlushOptions());
}
auto l0_files = collector->GetFlushedFiles();
EXPECT_EQ(5, l0_files.size());
rocksdb::SyncPoint::GetInstance()->LoadDependency({
{"CompactFilesImpl:2", "CompactFilesTest.CapturingPendingFiles:0"},
{"CompactFilesTest.CapturingPendingFiles:1", "CompactFilesImpl:3"},
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
// Start compacting files.
rocksdb::port::Thread compaction_thread(
[&] { EXPECT_OK(db->CompactFiles(CompactionOptions(), l0_files, 1)); });
// In the meantime flush another file.
TEST_SYNC_POINT("CompactFilesTest.CapturingPendingFiles:0");
db->Put(WriteOptions(), "key5", "value");
db->Flush(FlushOptions());
TEST_SYNC_POINT("CompactFilesTest.CapturingPendingFiles:1");
compaction_thread.join();
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
delete db;
// Make sure we can reopen the DB.
s = DB::Open(options, db_name_, &db);
ASSERT_TRUE(s.ok());
assert(db);
delete db;
}
TEST_F(CompactFilesTest, CompactionFilterWithGetSv) {
class FilterWithGet : public CompactionFilter {
public:
virtual bool Filter(int /*level*/, const Slice& /*key*/,
const Slice& /*value*/, std::string* /*new_value*/,
bool* /*value_changed*/) const override {
if (db_ == nullptr) {
return true;
}
std::string res;
db_->Get(ReadOptions(), "", &res);
return true;
}
void SetDB(DB* db) {
db_ = db;
}
virtual const char* Name() const override { return "FilterWithGet"; }
private:
DB* db_;
};
std::shared_ptr<FilterWithGet> cf(new FilterWithGet());
Options options;
options.create_if_missing = true;
options.compaction_filter = cf.get();
DB* db = nullptr;
DestroyDB(db_name_, options);
Status s = DB::Open(options, db_name_, &db);
ASSERT_OK(s);
cf->SetDB(db);
// Write one L0 file
db->Put(WriteOptions(), "K1", "V1");
db->Flush(FlushOptions());
// Compact all L0 files using CompactFiles
rocksdb::ColumnFamilyMetaData meta;
db->GetColumnFamilyMetaData(&meta);
for (auto& file : meta.levels[0].files) {
std::string fname = file.db_path + "/" + file.name;
ASSERT_OK(
db->CompactFiles(rocksdb::CompactionOptions(), {fname}, 0));
}
delete db;
}
} // 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 DBImpl::CompactFiles is not supported in ROCKSDB_LITE\n");
return 0;
}
#endif // !ROCKSDB_LITE
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