RocksDB has the same problems as LevelDB (uses large numbers of file descriptors, considerable read overhead compared to LMDB), plus it&#x27;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.<p>[1] <a href="https:&#x2F;&#x2F;www.sqlite.org&#x2F;src4&#x2F;doc&#x2F;trunk&#x2F;www&#x2F;lsmusr.wiki" rel="nofollow">https:&#x2F;&#x2F;www.sqlite.org&#x2F;src4&#x2F;doc&#x2F;trunk&#x2F;www&#x2F;lsmusr.wiki</a>