TEST(MergedSSTableReader, Lookup) {
SSTableWriteOption option;
std::string prefix = "/tmp/test_merged_look_up";
option.set_path(prefix);
option.set_compress_type(CompressType_kSnappy);
option.set_sharding_policy("FingerprintSharding");
const int kNumShard = 5;
FingerprintSharding sharding;
sharding.SetShardingNumber(kNumShard);
ShardingSSTableWriter builder(kNumShard, option);
for (int i = 0; i < kTestNum; ++i) {
std::string key = GenKey(i, kMaxLength);
std::string value = GenValue(i, kMaxLength);
builder.AddOrDie(key, value);
}
LOG(INFO)<< "before flush";
builder.Flush();
LOG(INFO)<< "after flush";
MergedSSTableReader merged_sstable;
std::vector<std::string> files;
for (int i = 1; i < kNumShard; ++i) {
std::string path = ShardingSSTableWriter::GetShardingPath(prefix, i, kNumShard);
VLOG(2) << path;
files.push_back(path);
}
LOG(INFO)<< "begin to open merged sstable!";
ASSERT_TRUE(merged_sstable.Open(files, SSTableReader::ON_DISK, false));
LOG(INFO)<< "open done!";
for (int i = 0; i < kTestNum; ++i) {
std::string key = GenKey(i, kMaxLength);
std::string value = GenValue(i, kMaxLength);
int idx = sharding.Shard(key);
std::string value_result;
if (idx != 0) {
ASSERT_TRUE(merged_sstable.Lookup(key, &value_result))<< "key: " << key;
ASSERT_EQ(value, value_result);
} else {
ASSERT_FALSE(merged_sstable.Lookup(key, &value_result));
}
}
LOG(INFO)<< "done!";
}
void CompositedSSTableWriter::GetNewWriter() {
CompressType compress_type = CompressType_kUnCompress;
// TODO(yeshunping) : support more algorithms
if (FLAGS_compress_type == "snappy") {
compress_type = CompressType_kSnappy;
} else if (FLAGS_compress_type == "lzo") {
compress_type = CompressType_kLzo;
} else if (FLAGS_compress_type == "none") {
compress_type = CompressType_kUnCompress;
}
std::string path_suffix = option_.path();
path_suffix = ReplaceAll(path_suffix, "/", "_");
const std::string base = FLAGS_tmp_dir_and_prefix + path_suffix;
std::string path = base + NumberToString(RealtimeClock.MicroSeconds());
paths_.push_back(path);
SSTableWriteOption option;
option.set_compress_type(compress_type);
option.set_path(path);
builder_.reset(new SingleSSTableWriter(option));
}
TEST(MergedSSTableReader, ReadMultiFiles) {
SSTableWriteOption option;
std::string path = "/tmp/test_single_lzo_disk.sstable";
option.set_path(path);
option.set_compress_type(CompressType_kSnappy);
SingleSSTableWriter builder(option);
SSTableWriteOption option1;
std::string path1 = "/tmp/test_unsorted_lzo_disk.sstable";
option1.set_path(path1);
option1.set_compress_type(CompressType_kSnappy);
UnsortedSSTableWriter builder1(option1);
LOG(INFO)<< "Start build sstable :" << path;
LOG(INFO)<< "Start build sstable :" << path1;
for (int i = 0; i < kTestNum; ++i) {
std::string key = GenKey(i, kMaxLength);
std::string value = GenValue(i, kMaxLength);
builder.Add(key, value);
builder1.Add(key, value);
if (i % 1000 == 0) {
builder.AddMetaData(key, value);
builder1.AddMetaData(key, value);
}
}
LOG(INFO)<< "Start flush ...";
EXPECT_TRUE(builder.Flush());
EXPECT_TRUE(builder1.Flush());
LOG(INFO)<< "Finish flush!";
// open a sstable
std::vector<std::string> paths;
paths.push_back(path);
paths.push_back(path1);
MergedSSTableReader sstable;
if (!sstable.Open(paths, SSTableReader::ON_DISK, true)) {
LOG(INFO)<< "error open sstable!";
}
EXPECT_EQ(sstable.EntryCount(), 2 * kTestNum);
toft::scoped_ptr<SSTableReader::Iterator> iter(sstable.NewIterator());
LOG(INFO)<< "start iteration";
for (int i = 0; i < kTestNum; ++i) {
std::string key = GenKey(i, kMaxLength);
std::string value = GenValue(i, kMaxLength);
iter.reset(sstable.Seek(key));
EXPECT_TRUE(iter->Valid()) << i;
EXPECT_EQ(key, iter->key()) << i;
EXPECT_EQ(key + "_value", iter->value()) << i;
iter->Next();
EXPECT_TRUE(iter->Valid()) << i;
EXPECT_EQ(key, iter->key()) << i;
EXPECT_EQ(key + "_value", iter->value()) << i;
iter->Next();
}
ASSERT_FALSE(iter->Valid());
LOG(INFO)<< "finish iteration";
LOG(INFO)<< "start meta iteration";
toft::Closure<bool(const std::string &, const std::string &)> *callback = // NOLINT
toft::NewPermanentClosure(TestMetaData);
sstable.IterateMetaData(callback);
delete callback;
LOG(INFO)<< "finish meta iteration";
}