#LMDB benchmarks against other #databases; only #LevelDB is close in #performance, and still beats LMDB on writes (except batched sequential writes or writes of large values). This was when it was still called "OpenLDAP MDB". In particular it beats SQLite3 by generally about an order of magnitude and sometimes more.
on 02023-07-04discussion of #performance in #databases and #mmap; author of #LMDB says read-only mmap and pwrite works well for LMDB. Also pcmulqdq explains where #LevelDB came from from their experience with the Bigtable folks. “Every HDD since the 1980s has guaranteed atomic sector writes.”
on 02023-07-04