I add one OSD node to the cluster and I get 500MB/s throughput over my disks and it was 2 or 3 times better than before! but my latency raised 5 times!!! When I enable bluefs_buffered_io the throughput on disks gets 200MB/s and my latency gets down! Is there any kernel config/tuning that should be used to have correct latency without bluefs buffered io?
On Mon, Nov 23, 2020 at 3:52 PM Igor Fedotov <ifedo...@suse.de> wrote: > Hi Seena, > > just to note - this ticket might be relevant. > > https://tracker.ceph.com/issues/48276 > > > Mind leaving a comment there? > > > Thanks, > > Igor > > On 11/23/2020 2:51 AM, Seena Fallah wrote: > > Now one of my OSDs gets segfault. > > Here is the full trace: https://paste.ubuntu.com/p/4KHcCG9YQx/ > > > > On Mon, Nov 23, 2020 at 2:16 AM Seena Fallah <seenafal...@gmail.com> > wrote: > > > >> Hi all, > >> > >> After I upgrade from 14.2.9 to 14.2.14 my OSDs are using less more > memory > >> than before! I give each OSD 6GB memory target and before the free > memory > >> was 20GB and now after 24h from the upgrade I have 104GB free memory of > >> 128GB memory! Also, my OSD latency got increases! > >> This happens in both SSD and HDD tier. > >> > >> Are there any notes from the upgrade I missed? Is it related to > >> bluefs_buffered_io? > >> If BlueFS do a direct IO shouldn't BlueFS/Bluestore use the targeted > >> memory for its cache and does it mean before the upgrade the memory used > >> was by a kernel that buffers the IO and wasn't for the ceph-osd? > >> > >> Thanks. > >> > > _______________________________________________ > > ceph-users mailing list -- ceph-users@ceph.io > > To unsubscribe send an email to ceph-users-le...@ceph.io > _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
