Hey Frédéric, > Can I ask what symptoms made you interested in tombstones?
Mostly poor index performance due to slow rocksdb iterators (the cause being excessive tombstone accumulation). > Do you think this phenomenon could be related to tombstones? And that > enabling rocksdb_cf_compact_on_deletion would help to avoid this situation? I don't have experience with rocksdb spill, unfortunately. If compaction is helping with spill, then more frequent compaction sounds like it could help, though I don't know whether this setting in particular will help. > Also, could ttl_option be an alternative to rocksdb_cf_compact_on_deletion > that wasn't backported to v16.2.10 (RHCS 5.3z7)? Yes, we've successfully used ttl to mitigate tombstone problems before the introduction of rocksdb_cf_compact_on_deletion, and it may be more relevant to your situation. You can add ttl=<seconds> to your rocksdb options and restart OSDs to give it a try. Josh _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
