mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-15 10:52:30 +00:00
108 lines
3.3 KiB
C++
108 lines
3.3 KiB
C++
#include "MergeTreeMetadataCache.h"
|
|
|
|
#if USE_ROCKSDB
|
|
#include <Common/ProfileEvents.h>
|
|
#include <Common/logger_useful.h>
|
|
|
|
namespace ProfileEvents
|
|
{
|
|
extern const Event MergeTreeMetadataCachePut;
|
|
extern const Event MergeTreeMetadataCacheGet;
|
|
extern const Event MergeTreeMetadataCacheDelete;
|
|
extern const Event MergeTreeMetadataCacheSeek;
|
|
}
|
|
|
|
namespace DB
|
|
{
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int SYSTEM_ERROR;
|
|
}
|
|
|
|
|
|
std::unique_ptr<MergeTreeMetadataCache> MergeTreeMetadataCache::create(const String & dir, size_t size)
|
|
{
|
|
assert(size != 0);
|
|
rocksdb::Options options;
|
|
rocksdb::BlockBasedTableOptions table_options;
|
|
rocksdb::DB * db;
|
|
|
|
options.create_if_missing = true;
|
|
auto cache = rocksdb::NewLRUCache(size);
|
|
table_options.block_cache = cache;
|
|
options.table_factory.reset(rocksdb::NewBlockBasedTableFactory(table_options));
|
|
rocksdb::Status status = rocksdb::DB::Open(options, dir, &db);
|
|
if (status != rocksdb::Status::OK())
|
|
throw Exception(
|
|
ErrorCodes::SYSTEM_ERROR,
|
|
"Fail to open rocksdb path at: {} status:{}. You can try to remove the cache (this will not affect any table data).",
|
|
dir,
|
|
status.ToString());
|
|
return std::make_unique<MergeTreeMetadataCache>(db);
|
|
}
|
|
|
|
MergeTreeMetadataCache::Status MergeTreeMetadataCache::put(const String & key, const String & value)
|
|
{
|
|
auto options = rocksdb::WriteOptions();
|
|
options.sync = true;
|
|
options.disableWAL = false;
|
|
auto status = rocksdb->Put(options, key, value);
|
|
ProfileEvents::increment(ProfileEvents::MergeTreeMetadataCachePut);
|
|
return status;
|
|
}
|
|
|
|
MergeTreeMetadataCache::Status MergeTreeMetadataCache::del(const String & key)
|
|
{
|
|
auto options = rocksdb::WriteOptions();
|
|
options.sync = true;
|
|
options.disableWAL = false;
|
|
auto status = rocksdb->Delete(options, key);
|
|
ProfileEvents::increment(ProfileEvents::MergeTreeMetadataCacheDelete);
|
|
LOG_TRACE(log, "Delete key:{} from MergeTreeMetadataCache status:{}", key, status.ToString());
|
|
return status;
|
|
}
|
|
|
|
MergeTreeMetadataCache::Status MergeTreeMetadataCache::get(const String & key, String & value)
|
|
{
|
|
auto status = rocksdb->Get(rocksdb::ReadOptions(), key, &value);
|
|
ProfileEvents::increment(ProfileEvents::MergeTreeMetadataCacheGet);
|
|
LOG_TRACE(log, "Get key:{} from MergeTreeMetadataCache status:{}", key, status.ToString());
|
|
return status;
|
|
}
|
|
|
|
void MergeTreeMetadataCache::getByPrefix(const String & prefix, Strings & keys, Strings & values)
|
|
{
|
|
auto * it = rocksdb->NewIterator(rocksdb::ReadOptions());
|
|
rocksdb::Slice target(prefix);
|
|
for (it->Seek(target); it->Valid(); it->Next())
|
|
{
|
|
const auto key = it->key();
|
|
if (!key.starts_with(target))
|
|
break;
|
|
|
|
const auto value = it->value();
|
|
keys.emplace_back(key.data(), key.size());
|
|
values.emplace_back(value.data(), value.size());
|
|
}
|
|
LOG_TRACE(log, "Seek with prefix:{} from MergeTreeMetadataCache items:{}", prefix, keys.size());
|
|
ProfileEvents::increment(ProfileEvents::MergeTreeMetadataCacheSeek);
|
|
delete it;
|
|
}
|
|
|
|
uint64_t MergeTreeMetadataCache::getEstimateNumKeys() const
|
|
{
|
|
uint64_t keys = 0;
|
|
rocksdb->GetAggregatedIntProperty("rocksdb.estimate-num-keys", &keys);
|
|
return keys;
|
|
}
|
|
|
|
void MergeTreeMetadataCache::shutdown()
|
|
{
|
|
rocksdb->Close();
|
|
rocksdb.reset();
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|