Blob DB TTL extractor
Summary: Introducing blob_db::TTLExtractor to replace extract_ttl_fn. The TTL extractor can be use to extract TTL from keys insert with Put or WriteBatch. Change over existing extract_ttl_fn are: * If value is changed, it will be return via std::string* (rather than Slice*). With Slice* the new value has to be part of the existing value. With std::string* the limitation is removed. * It can optionally return TTL or expiration. Other changes in this PR: * replace `std::chrono::system_clock` with `Env::NowMicros` so that I can mock time in tests. * add several TTL tests. * other minor naming change. Closes https://github.com/facebook/rocksdb/pull/2659 Differential Revision: D5512627 Pulled By: yiwu-arbug fbshipit-source-id: 0dfcb00d74d060b8534c6130c808e4d5d0a54440
Showing
utilities/blob_db/ttl_extractor.h
0 → 100644
想要评论请 注册 或 登录