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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).
//
#include "db/db_impl/db_impl.h"
#include "db/version_set.h"
#include "rocksdb/db.h"
#include "rocksdb/utilities/ldb_cmd.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
#include "tools/ldb_cmd_impl.h"
#include "util/cast_util.h"
#include "util/string_util.h"
namespace ROCKSDB_NAMESPACE {
class ReduceLevelTest : public testing::Test {
public:
ReduceLevelTest() {
dbname_ = test::PerThreadDBPath("db_reduce_levels_test");
EXPECT_OK(DestroyDB(dbname_, Options()));
db_ = nullptr;
}
Status OpenDB(bool create_if_missing, int levels);
Status Put(const std::string& k, const std::string& v) {
return db_->Put(WriteOptions(), k, v);
}
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;
}
Status Flush() {
if (db_ == nullptr) {
return Status::InvalidArgument("DB not opened.");
}
DBImpl* db_impl = static_cast_with_check<DBImpl>(db_);
return db_impl->TEST_FlushMemTable();
}
void MoveL0FileToLevel(int level) {
DBImpl* db_impl = static_cast_with_check<DBImpl>(db_);
for (int i = 0; i < level; ++i) {
ASSERT_OK(db_impl->TEST_CompactRange(i, nullptr, nullptr));
}
}
void CloseDB() {
if (db_ != nullptr) {
delete db_;
db_ = nullptr;
}
}
bool ReduceLevels(int target_level);
int FilesOnLevel(int level) {
std::string property;
EXPECT_TRUE(db_->GetProperty(
"rocksdb.num-files-at-level" + std::to_string(level), &property));
return atoi(property.c_str());
}
private:
std::string dbname_;
DB* db_;
};
Status ReduceLevelTest::OpenDB(bool create_if_missing, int num_levels) {
ROCKSDB_NAMESPACE::Options opt;
opt.level_compaction_dynamic_level_bytes = false;
opt.num_levels = num_levels;
opt.create_if_missing = create_if_missing;
ROCKSDB_NAMESPACE::Status st =
ROCKSDB_NAMESPACE::DB::Open(opt, dbname_, &db_);
if (!st.ok()) {
fprintf(stderr, "Can't open the db:%s\n", st.ToString().c_str());
}
return st;
}
bool ReduceLevelTest::ReduceLevels(int target_level) {
std::vector<std::string> args =
ROCKSDB_NAMESPACE::ReduceDBLevelsCommand::PrepareArgs(
dbname_, target_level, false);
LDBCommand* level_reducer = LDBCommand::InitFromCmdLineArgs(
args, Options(), LDBOptions(), nullptr, LDBCommand::SelectCommand);
level_reducer->Run();
bool is_succeed = level_reducer->GetExecuteState().IsSucceed();
delete level_reducer;
return is_succeed;
}
TEST_F(ReduceLevelTest, Last_Level) {
ASSERT_OK(OpenDB(true, 4));
ASSERT_OK(Put("aaaa", "11111"));
ASSERT_OK(Flush());
MoveL0FileToLevel(3);
ASSERT_EQ(FilesOnLevel(3), 1);
CloseDB();
ASSERT_TRUE(ReduceLevels(3));
ASSERT_OK(OpenDB(true, 3));
ASSERT_EQ(FilesOnLevel(2), 1);
CloseDB();
ASSERT_TRUE(ReduceLevels(2));
ASSERT_OK(OpenDB(true, 2));
ASSERT_EQ(FilesOnLevel(1), 1);
CloseDB();
}
TEST_F(ReduceLevelTest, Top_Level) {
ASSERT_OK(OpenDB(true, 5));
ASSERT_OK(Put("aaaa", "11111"));
ASSERT_OK(Flush());
ASSERT_EQ(FilesOnLevel(0), 1);
CloseDB();
ASSERT_TRUE(ReduceLevels(4));
ASSERT_OK(OpenDB(true, 4));
CloseDB();
ASSERT_TRUE(ReduceLevels(3));
ASSERT_OK(OpenDB(true, 3));
CloseDB();
ASSERT_TRUE(ReduceLevels(2));
ASSERT_OK(OpenDB(true, 2));
CloseDB();
}
TEST_F(ReduceLevelTest, All_Levels) {
ASSERT_OK(OpenDB(true, 5));
ASSERT_OK(Put("a", "a11111"));
ASSERT_OK(Flush());
MoveL0FileToLevel(4);
ASSERT_EQ(FilesOnLevel(4), 1);
CloseDB();
ASSERT_OK(OpenDB(true, 5));
ASSERT_OK(Put("b", "b11111"));
ASSERT_OK(Flush());
MoveL0FileToLevel(3);
ASSERT_EQ(FilesOnLevel(3), 1);
ASSERT_EQ(FilesOnLevel(4), 1);
CloseDB();
ASSERT_OK(OpenDB(true, 5));
ASSERT_OK(Put("c", "c11111"));
ASSERT_OK(Flush());
MoveL0FileToLevel(2);
ASSERT_EQ(FilesOnLevel(2), 1);
ASSERT_EQ(FilesOnLevel(3), 1);
ASSERT_EQ(FilesOnLevel(4), 1);
CloseDB();
ASSERT_OK(OpenDB(true, 5));
ASSERT_OK(Put("d", "d11111"));
ASSERT_OK(Flush());
MoveL0FileToLevel(1);
ASSERT_EQ(FilesOnLevel(1), 1);
ASSERT_EQ(FilesOnLevel(2), 1);
ASSERT_EQ(FilesOnLevel(3), 1);
ASSERT_EQ(FilesOnLevel(4), 1);
CloseDB();
ASSERT_TRUE(ReduceLevels(4));
ASSERT_OK(OpenDB(true, 4));
ASSERT_EQ("a11111", Get("a"));
ASSERT_EQ("b11111", Get("b"));
ASSERT_EQ("c11111", Get("c"));
ASSERT_EQ("d11111", Get("d"));
CloseDB();
ASSERT_TRUE(ReduceLevels(3));
ASSERT_OK(OpenDB(true, 3));
ASSERT_EQ("a11111", Get("a"));
ASSERT_EQ("b11111", Get("b"));
ASSERT_EQ("c11111", Get("c"));
ASSERT_EQ("d11111", Get("d"));
CloseDB();
ASSERT_TRUE(ReduceLevels(2));
ASSERT_OK(OpenDB(true, 2));
ASSERT_EQ("a11111", Get("a"));
ASSERT_EQ("b11111", Get("b"));
ASSERT_EQ("c11111", Get("c"));
ASSERT_EQ("d11111", Get("d"));
CloseDB();
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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