Summary:
If RocksDB enables user-defined timestamp, then RocksDB read path can filter table files by the min/max timestamps of each file. If application wants to lookup a key that is the most recent and visible to a certain timestamp ts, then we can compare ts with the min_ts of each file. If ts < min_ts, then we know all keys in the file is not visible at time ts, then we do not have to open the file. This can also save an IO.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/11332

Reviewed By: pdillinger

Differential Revision: D44763497

Pulled By: guowentian

fbshipit-source-id: abde346b9f18480fe03c04e4006e7d62aa9c22a8