Prefix seek of rocksdb

Hi folks, RocksDB has a feature to help facilitate the use cases that involve common prefixes in the object names. It requires the option prefix_extractor to be defined so it knows how to figure out prefixes and currently auto_prefix_mode in ReadOptions is the recommended use of this feature. I don’t seem to find anywhere in ceph code that tries to make use of it. Has this feature been explored by the team? Thanks, Yixin