Hi Team, @vitalif@xxxxxxxxxx , thank you for information and could you please clarify on the below quires as well, 1. Average object size we use will be 256KB to 512KB , will there be deferred write queue ?
With the default settings, no (bluestore_prefer_deferred_size_hdd = 32KB)
Are you sure that 256-512KB operations aren't counted as multiple operations in your disk stats?
2. Share the link of existing rocksdb ticket which does 2 write + syncs.
My PR is here https://github.com/ceph/ceph/pull/26909, you can find the issue tracker links inside it.
3. Any configuration by which we can reduce/optimize the iops ?
As already said part of your I/O may be caused by the metadata (rocksdb) reads if it doesn't fit into RAM. You can try to add more RAM in that case... :)
You can also try to add SSDs for metadata (block.db/block.wal). Is there something else?... I don't think so. -- Vitaliy Filippov _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
