rocksdb/db/cuckoo_table_db_test.cc

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// Copyright (c) 2014, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#include "db/db_impl.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "table/meta_blocks.h"
#include "table/cuckoo_table_factory.h"
#include "table/cuckoo_table_reader.h"
#include "util/testharness.h"
#include "util/testutil.h"
namespace rocksdb {
class CuckooTableDBTest {
private:
std::string dbname_;
Env* env_;
DB* db_;
public:
CuckooTableDBTest() : env_(Env::Default()) {
dbname_ = test::TmpDir() + "/cuckoo_table_db_test";
ASSERT_OK(DestroyDB(dbname_, Options()));
db_ = nullptr;
Reopen();
}
~CuckooTableDBTest() {
delete db_;
ASSERT_OK(DestroyDB(dbname_, Options()));
}
Options CurrentOptions() {
Options options;
options.table_factory.reset(NewCuckooTableFactory());
options.memtable_factory.reset(NewHashLinkListRepFactory(4, 0, 3, true));
options.allow_mmap_reads = true;
options.create_if_missing = true;
options.max_mem_compaction_level = 0;
return options;
}
DBImpl* dbfull() {
return reinterpret_cast<DBImpl*>(db_);
}
// The following util methods are copied from plain_table_db_test.
void Reopen(Options* options = nullptr) {
delete db_;
db_ = nullptr;
Options opts;
if (options != nullptr) {
opts = *options;
} else {
opts = CurrentOptions();
opts.create_if_missing = true;
}
ASSERT_OK(DB::Open(opts, dbname_, &db_));
}
Status Put(const Slice& k, const Slice& v) {
return db_->Put(WriteOptions(), k, v);
}
Status Delete(const std::string& k) {
return db_->Delete(WriteOptions(), k);
}
std::string Get(const std::string& k) {
ReadOptions options;
std::string result;
Status s = db_->Get(options, k, &result);
if (s.IsNotFound()) {
result = "NOT_FOUND";
} else if (!s.ok()) {
result = s.ToString();
}
return result;
}
int NumTableFilesAtLevel(int level) {
std::string property;
ASSERT_TRUE(
db_->GetProperty("rocksdb.num-files-at-level" + NumberToString(level),
&property));
return atoi(property.c_str());
}
// Return spread of files per level
std::string FilesPerLevel() {
std::string result;
int last_non_zero_offset = 0;
for (int level = 0; level < db_->NumberLevels(); level++) {
int f = NumTableFilesAtLevel(level);
char buf[100];
snprintf(buf, sizeof(buf), "%s%d", (level ? "," : ""), f);
result += buf;
if (f > 0) {
last_non_zero_offset = result.size();
}
}
result.resize(last_non_zero_offset);
return result;
}
};
TEST(CuckooTableDBTest, Flush) {
// Try with empty DB first.
ASSERT_TRUE(dbfull() != nullptr);
ASSERT_EQ("NOT_FOUND", Get("key2"));
// Add some values to db.
Options options = CurrentOptions();
Reopen(&options);
ASSERT_OK(Put("key1", "v1"));
ASSERT_OK(Put("key2", "v2"));
ASSERT_OK(Put("key3", "v3"));
dbfull()->TEST_FlushMemTable();
TablePropertiesCollection ptc;
reinterpret_cast<DB*>(dbfull())->GetPropertiesOfAllTables(&ptc);
ASSERT_EQ(1U, ptc.size());
ASSERT_EQ(3U, ptc.begin()->second->num_entries);
ASSERT_EQ("1", FilesPerLevel());
ASSERT_EQ("v1", Get("key1"));
ASSERT_EQ("v2", Get("key2"));
ASSERT_EQ("v3", Get("key3"));
ASSERT_EQ("NOT_FOUND", Get("key4"));
// Now add more keys and flush.
ASSERT_OK(Put("key4", "v4"));
ASSERT_OK(Put("key5", "v5"));
ASSERT_OK(Put("key6", "v6"));
dbfull()->TEST_FlushMemTable();
reinterpret_cast<DB*>(dbfull())->GetPropertiesOfAllTables(&ptc);
ASSERT_EQ(2U, ptc.size());
auto row = ptc.begin();
ASSERT_EQ(3U, row->second->num_entries);
ASSERT_EQ(3U, (++row)->second->num_entries);
ASSERT_EQ("2", FilesPerLevel());
ASSERT_EQ("v1", Get("key1"));
ASSERT_EQ("v2", Get("key2"));
ASSERT_EQ("v3", Get("key3"));
ASSERT_EQ("v4", Get("key4"));
ASSERT_EQ("v5", Get("key5"));
ASSERT_EQ("v6", Get("key6"));
ASSERT_OK(Delete("key6"));
ASSERT_OK(Delete("key5"));
ASSERT_OK(Delete("key4"));
dbfull()->TEST_FlushMemTable();
reinterpret_cast<DB*>(dbfull())->GetPropertiesOfAllTables(&ptc);
ASSERT_EQ(3U, ptc.size());
row = ptc.begin();
ASSERT_EQ(3U, row->second->num_entries);
ASSERT_EQ(3U, (++row)->second->num_entries);
ASSERT_EQ(3U, (++row)->second->num_entries);
ASSERT_EQ("3", FilesPerLevel());
ASSERT_EQ("v1", Get("key1"));
ASSERT_EQ("v2", Get("key2"));
ASSERT_EQ("v3", Get("key3"));
ASSERT_EQ("NOT_FOUND", Get("key4"));
ASSERT_EQ("NOT_FOUND", Get("key5"));
ASSERT_EQ("NOT_FOUND", Get("key6"));
}
TEST(CuckooTableDBTest, FlushWithDuplicateKeys) {
Options options = CurrentOptions();
Reopen(&options);
ASSERT_OK(Put("key1", "v1"));
ASSERT_OK(Put("key2", "v2"));
ASSERT_OK(Put("key1", "v3")); // Duplicate
dbfull()->TEST_FlushMemTable();
TablePropertiesCollection ptc;
reinterpret_cast<DB*>(dbfull())->GetPropertiesOfAllTables(&ptc);
ASSERT_EQ(1U, ptc.size());
ASSERT_EQ(2U, ptc.begin()->second->num_entries);
ASSERT_EQ("1", FilesPerLevel());
ASSERT_EQ("v3", Get("key1"));
ASSERT_EQ("v2", Get("key2"));
}
namespace {
static std::string Key(int i) {
char buf[100];
snprintf(buf, sizeof(buf), "key_______%06d", i);
return std::string(buf);
}
static std::string Uint64Key(uint64_t i) {
std::string str;
str.resize(8);
memcpy(&str[0], static_cast<void*>(&i), 8);
return str;
}
} // namespace.
TEST(CuckooTableDBTest, Uint64Comparator) {
Options options = CurrentOptions();
options.comparator = test::Uint64Comparator();
Reopen(&options);
ASSERT_OK(Put(Uint64Key(1), "v1"));
ASSERT_OK(Put(Uint64Key(2), "v2"));
ASSERT_OK(Put(Uint64Key(3), "v3"));
dbfull()->TEST_FlushMemTable();
ASSERT_EQ("v1", Get(Uint64Key(1)));
ASSERT_EQ("v2", Get(Uint64Key(2)));
ASSERT_EQ("v3", Get(Uint64Key(3)));
ASSERT_EQ("NOT_FOUND", Get(Uint64Key(4)));
// Add more keys.
ASSERT_OK(Delete(Uint64Key(2))); // Delete.
ASSERT_OK(Put(Uint64Key(3), "v0")); // Update.
ASSERT_OK(Put(Uint64Key(4), "v4"));
dbfull()->TEST_FlushMemTable();
ASSERT_EQ("v1", Get(Uint64Key(1)));
ASSERT_EQ("NOT_FOUND", Get(Uint64Key(2)));
ASSERT_EQ("v0", Get(Uint64Key(3)));
ASSERT_EQ("v4", Get(Uint64Key(4)));
}
TEST(CuckooTableDBTest, CompactionTrigger) {
Options options = CurrentOptions();
options.write_buffer_size = 100 << 10; // 100KB
options.level0_file_num_compaction_trigger = 2;
Reopen(&options);
// Write 11 values, each 10016 B
for (int idx = 0; idx < 11; ++idx) {
ASSERT_OK(Put(Key(idx), std::string(10000, 'a' + idx)));
}
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_EQ("1", FilesPerLevel());
// Generate one more file in level-0, and should trigger level-0 compaction
for (int idx = 11; idx < 22; ++idx) {
ASSERT_OK(Put(Key(idx), std::string(10000, 'a' + idx)));
}
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_CompactRange(0, nullptr, nullptr);
ASSERT_EQ("0,2", FilesPerLevel());
for (int idx = 0; idx < 22; ++idx) {
ASSERT_EQ(std::string(10000, 'a' + idx), Get(Key(idx)));
}
}
TEST(CuckooTableDBTest, SameKeyInsertedInTwoDifferentFilesAndCompacted) {
// Insert same key twice so that they go to different SST files. Then wait for
// compaction and check if the latest value is stored and old value removed.
Options options = CurrentOptions();
options.write_buffer_size = 100 << 10; // 100KB
options.level0_file_num_compaction_trigger = 2;
Reopen(&options);
// Write 11 values, each 10016 B
for (int idx = 0; idx < 11; ++idx) {
ASSERT_OK(Put(Key(idx), std::string(10000, 'a')));
}
dbfull()->TEST_WaitForFlushMemTable();
ASSERT_EQ("1", FilesPerLevel());
// Generate one more file in level-0, and should trigger level-0 compaction
for (int idx = 0; idx < 11; ++idx) {
ASSERT_OK(Put(Key(idx), std::string(10000, 'a' + idx)));
}
dbfull()->TEST_WaitForFlushMemTable();
dbfull()->TEST_CompactRange(0, nullptr, nullptr);
ASSERT_EQ("0,1", FilesPerLevel());
for (int idx = 0; idx < 11; ++idx) {
ASSERT_EQ(std::string(10000, 'a' + idx), Get(Key(idx)));
}
}
TEST(CuckooTableDBTest, AdaptiveTable) {
Options options = CurrentOptions();
// Write some keys using cuckoo table.
options.table_factory.reset(NewCuckooTableFactory());
Reopen(&options);
ASSERT_OK(Put("key1", "v1"));
ASSERT_OK(Put("key2", "v2"));
ASSERT_OK(Put("key3", "v3"));
dbfull()->TEST_FlushMemTable();
// Write some keys using plain table.
options.create_if_missing = false;
options.table_factory.reset(NewPlainTableFactory());
Reopen(&options);
ASSERT_OK(Put("key4", "v4"));
ASSERT_OK(Put("key1", "v5"));
dbfull()->TEST_FlushMemTable();
// Write some keys using block based table.
std::shared_ptr<TableFactory> block_based_factory(
NewBlockBasedTableFactory());
options.table_factory.reset(NewAdaptiveTableFactory(block_based_factory));
Reopen(&options);
ASSERT_OK(Put("key5", "v6"));
ASSERT_OK(Put("key2", "v7"));
dbfull()->TEST_FlushMemTable();
ASSERT_EQ("v5", Get("key1"));
ASSERT_EQ("v7", Get("key2"));
ASSERT_EQ("v3", Get("key3"));
ASSERT_EQ("v4", Get("key4"));
ASSERT_EQ("v6", Get("key5"));
}
} // namespace rocksdb
int main(int argc, char** argv) { return rocksdb::test::RunAllTests(); }