Ceph

03/02/2018

04:18 PM RADOS Bug #23200 (Resolved): invalid JSON returned when querying pool parameters

When requesting JSON formatted results for querying for pool
parameters, the list that comes back is not valid JSON....

10/31/2017

03:49 PM Linux kernel client Bug #21420: ceph_osdc_writepages(): pre-allocated osdc->msgpool_op messages vs large number of sn...

What is the correct upper bound on the number of snapshots - is it 400 or 4000? In the original description, you men...

10/26/2017

05:10 PM Linux kernel client Bug #21420: ceph_osdc_writepages(): pre-allocated osdc->msgpool_op messages vs large number of sn...

We are seeing this on other systems now that have fewer snapshots, it appears to happen around the time that the snap...

10/20/2017

07:16 PM Ceph Bug #21761: ceph-osd consumes way too much memory during recovery

The problem has since sorted itself out (though it took over a week to get back to HEALTH_OK). I believe the recover...

10/13/2017

02:30 PM Ceph Bug #21761: ceph-osd consumes way too much memory during recovery

Here are some heap stats from one of the OSDs that is currently consuming about 21GB of RAM according to "top":
<p...

10/11/2017

03:01 PM Ceph Bug #21761 (Can't reproduce): ceph-osd consumes way too much memory during recovery

The ceph-osd processes have been seen consuming upwards of 20GB of RAM per process when a system is recovering. Even...

10/10/2017

12:51 PM fs Bug #21412: cephfs: too many cephfs snapshots chokes the system

The trimsnap states. The rmdir actually completes quickly, but the resulting operations throw the entire cluster int...

10/09/2017

01:56 PM fs Bug #21412: cephfs: too many cephfs snapshots chokes the system

Note, the bug says "10.2.7" but we have since upgraded to 10.2.9 and the same problem exists.

01:55 PM fs Bug #21412: cephfs: too many cephfs snapshots chokes the system

Here is a dump of the cephfs 'dentry_lru' table, in case it is interesting.

01:53 PM fs Bug #21412: cephfs: too many cephfs snapshots chokes the system

Here is data collected from a recent attempt to delete a very old and very large snapshot:
The snapshot extended a...