RocksDB has the same problems as LevelDB (uses large numbers of file descriptors, considerable read overhead compared to LMDB), plus it's even more complex and

RocksDB has the same problems as LevelDB (uses large numbers of file descriptors, considerable read overhead compared to LMDB), plus it's even more complex and harder to configure. I had high hopes for the LSM tree from SQLite4[1], but last I checked development was stalled. [1] https://www.sqlite.org/src4/doc/trunk/www/lsmusr.wiki https://www.sqlite.org/src4/doc/trunk/www/lsmusr.wiki