On Mon, Sep 21, 2015 at 11:43 PM, Robert LeBlanc <[email protected]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > I'm starting to wonder if this has to do with some OSDs getting full > or the 0.94.3 code. Earlier this afternoon, I cleared out my test > cluster so there was no pools. I created anew rbd pool and started > filling it with 6 - 1TB fio jobs replication 3 with 6 spindles over > six servers. It was running 0.94.2 at the time. After several hours of > writes, we had the new patched 0.93.3 binaries ready for testing so I > rolled the update on the test cluster while the fio jobs were running. > There were a few blocked I/O as the services were restarted (nothing > I'm concerned about). Now that the OSDs are about 60% full, the > blocked I/O is becoming very frequent even with the backports. The > write bandwidth was consistently at 200 MB/s until this point, now it > is fluctuating between 200 MB/s and 75 MB/s mostly around about > 100MB/s. Our production cluster is XFS on the OSDs, this test cluster > is EXT4. > > I'll see if I can go back to 0.94.2 and fill the cluster up again.... > Going back to 0.94.2 and 0.94.0 still has the issue (although I didn't > refill the cluster, I didn't delete what was already there). I'm > building the latest of hammer-backports now and see if it resolves the > issue.
You're probably running into the FileStore collection splitting and that's what is slowing things down in that testing. -Greg _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
