Hi, I'm still trying to combat really bad read performance from HDD-backed replicated pools, which is under 100 MB/s most of the time with 1 thread and QD=1. I don't quite understand why the reads are that slow, i.e. much slower than a single HDD, but do understand that Ceph clients read a PG from primary OSD only.
Since reads are immutable, is it possible to make Ceph clients read PG in a RAID1-like fashion, i.e. if a PG has a primary OSD and two replicas, is it possible to read all 3 OSDs in parallel for a 3x performance gain? I would appreciate any advice. Best regards, Zakhar _______________________________________________ ceph-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
