What's the current health of the cluster?
It may help to compact the monitors' LevelDB store if they have grown in size http://www.sebastien-han.fr/blog/2014/10/27/ceph-mon-store-taking-up-a-lot-of-space/
Depends on the size of the mon's store size it may take some time to compact, make sure to do only one at a time.
Kobi Laredo
Cloud Systems Engineer | (408) 409-KOBI
On Fri, Mar 27, 2015 at 10:31 AM, Chu Duc Minh <chu.ducminh@xxxxxxxxx> wrote:
All my monitors running.But i deleting pool .rgw.buckets, now having 13 million objects (just test data).The reason that i must delete this pool is my cluster become unstable, and sometimes an OSD down, PG peering, incomplete,...Therefore i must delete this pool to re-stablize my cluster. (radosgw is too slow for delete objects when one of my bucket reachs few million objects).Regards,On Sat, Mar 28, 2015 at 12:23 AM, Gregory Farnum <greg@xxxxxxxxxxx> wrote:Are all your monitors running? Usually a temporary hang means that the Ceph client tries to reach a monitor that isn't up, then times out and contacts a different one.
I have also seen it just be slow if the monitors are processing so many updates that they're behind, but that's usually on a very unhappy cluster.
-GregOn Fri, Mar 27, 2015 at 8:50 AM Chu Duc Minh <chu.ducminh@xxxxxxxxx> wrote:_______________________________________________On my CEPH cluster, "ceph -s" return result quite slow.Sometimes it return result immediately, sometimes i hang few seconds before return result.Do you think this problem (ceph -s slow return) only relate to ceph-mon(s) process? or maybe it relate to ceph-osd(s) too?(i deleting a big bucket, .rgw.buckets, and ceph-osd(s) disk util quite high)Regards,
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