rocksdb/db/db_table_properties_test.cc

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// Copyright (c) 2013, 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.
//
// 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 <unordered_set>
#include <vector>
#include "db/db_test_util.h"
#include "port/stack_trace.h"
#include "rocksdb/db.h"
#include "util/testharness.h"
#include "util/testutil.h"
#ifndef ROCKSDB_LITE
namespace rocksdb {
// A helper function that ensures the table properties returned in
// `GetPropertiesOfAllTablesTest` is correct.
// This test assumes entries size is different for each of the tables.
namespace {
void VerifyTableProperties(DB* db, uint64_t expected_entries_size) {
TablePropertiesCollection props;
ASSERT_OK(db->GetPropertiesOfAllTables(&props));
ASSERT_EQ(4U, props.size());
std::unordered_set<uint64_t> unique_entries;
// Indirect test
uint64_t sum = 0;
for (const auto& item : props) {
unique_entries.insert(item.second->num_entries);
sum += item.second->num_entries;
}
ASSERT_EQ(props.size(), unique_entries.size());
ASSERT_EQ(expected_entries_size, sum);
}
} // namespace
class DBTablePropertiesTest : public DBTestBase {
public:
DBTablePropertiesTest() : DBTestBase("/db_table_properties_test") {}
TablePropertiesCollection TestGetPropertiesOfTablesInRange(
std::vector<Range> ranges, std::size_t* num_properties = nullptr,
std::size_t* num_files = nullptr);
};
TEST_F(DBTablePropertiesTest, GetPropertiesOfAllTablesTest) {
Options options = CurrentOptions();
options.level0_file_num_compaction_trigger = 8;
Reopen(options);
// Create 4 tables
for (int table = 0; table < 4; ++table) {
for (int i = 0; i < 10 + table; ++i) {
db_->Put(WriteOptions(), ToString(table * 100 + i), "val");
}
db_->Flush(FlushOptions());
}
// 1. Read table properties directly from file
Reopen(options);
VerifyTableProperties(db_, 10 + 11 + 12 + 13);
// 2. Put two tables to table cache and
Reopen(options);
// fetch key from 1st and 2nd table, which will internally place that table to
// the table cache.
for (int i = 0; i < 2; ++i) {
Get(ToString(i * 100 + 0));
}
VerifyTableProperties(db_, 10 + 11 + 12 + 13);
// 3. Put all tables to table cache
Reopen(options);
// fetch key from 1st and 2nd table, which will internally place that table to
// the table cache.
for (int i = 0; i < 4; ++i) {
Get(ToString(i * 100 + 0));
}
VerifyTableProperties(db_, 10 + 11 + 12 + 13);
}
TablePropertiesCollection
DBTablePropertiesTest::TestGetPropertiesOfTablesInRange(
std::vector<Range> ranges, std::size_t* num_properties,
std::size_t* num_files) {
// run the query
TablePropertiesCollection props;
EXPECT_OK(db_->GetPropertiesOfTablesInRange(
db_->DefaultColumnFamily(), &ranges[0], ranges.size(), &props));
// Make sure that we've received properties for those and for those files
// only which fall within requested ranges
std::vector<LiveFileMetaData> vmd;
db_->GetLiveFilesMetaData(&vmd);
for (auto md : vmd) {
std::string fn = md.db_path + md.name;
bool in_range = false;
for (auto r : ranges) {
// smallestkey < limit && largestkey >= start
if (r.limit.compare(md.smallestkey) >= 0 &&
r.start.compare(md.largestkey) <= 0) {
in_range = true;
EXPECT_GT(props.count(fn), 0);
}
}
if (!in_range) {
EXPECT_EQ(props.count(fn), 0);
}
}
if (num_properties) {
*num_properties = props.size();
}
if (num_files) {
*num_files = vmd.size();
}
return props;
}
TEST_F(DBTablePropertiesTest, GetPropertiesOfTablesInRange) {
// Fixed random sead
Random rnd(301);
Options options;
options.create_if_missing = true;
options.write_buffer_size = 4096;
options.max_write_buffer_number = 8;
options.level0_file_num_compaction_trigger = 2;
options.level0_slowdown_writes_trigger = 2;
options.level0_stop_writes_trigger = 4;
options.target_file_size_base = 2048;
options.max_bytes_for_level_base = 10240;
options.max_bytes_for_level_multiplier = 4;
options.soft_rate_limit = 1.1;
options.num_levels = 8;
DestroyAndReopen(options);
// build a decent LSM
for (int i = 0; i < 10000; i++) {
ASSERT_OK(Put(test::RandomKey(&rnd, 5), RandomString(&rnd, 102)));
}
Flush();
db_->PauseBackgroundWork();
// Ensure that we have at least L0, L1 and L2
ASSERT_GT(NumTableFilesAtLevel(0), 0);
ASSERT_GT(NumTableFilesAtLevel(1), 0);
ASSERT_GT(NumTableFilesAtLevel(2), 0);
// Query the largest range
std::size_t num_properties, num_files;
TestGetPropertiesOfTablesInRange(
{Range(test::RandomKey(&rnd, 5, test::RandomKeyType::SMALLEST),
test::RandomKey(&rnd, 5, test::RandomKeyType::LARGEST))},
&num_properties, &num_files);
ASSERT_EQ(num_properties, num_files);
// Query the empty range
TestGetPropertiesOfTablesInRange(
{Range(test::RandomKey(&rnd, 5, test::RandomKeyType::LARGEST),
test::RandomKey(&rnd, 5, test::RandomKeyType::SMALLEST))},
&num_properties, &num_files);
ASSERT_GT(num_files, 0);
ASSERT_EQ(num_properties, 0);
// Query the middle rangee
TestGetPropertiesOfTablesInRange(
{Range(test::RandomKey(&rnd, 5, test::RandomKeyType::MIDDLE),
test::RandomKey(&rnd, 5, test::RandomKeyType::LARGEST))},
&num_properties, &num_files);
ASSERT_GT(num_files, 0);
ASSERT_GT(num_files, num_properties);
ASSERT_GT(num_properties, 0);
// Query a bunch of random ranges
for (int j = 0; j < 100; j++) {
// create a bunch of ranges
std::vector<std::string> random_keys;
auto n = 2 * rnd.Uniform(50);
for (uint32_t i = 0; i < n; ++i) {
random_keys.push_back(test::RandomKey(&rnd, 5));
}
std::vector<Range> ranges;
auto it = random_keys.begin();
while (it != random_keys.end()) {
ranges.push_back(Range(*it, *(it + 1)));
it += 2;
}
TestGetPropertiesOfTablesInRange(std::move(ranges));
}
}
} // namespace rocksdb
#endif // ROCKSDB_LITE
int main(int argc, char** argv) {
rocksdb::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}