Hi, We observed the same behavior with kernel 4.7 and Ubuntu 14.04 under heavy load. Kernel 4.2 is stable. We use only S3 gateway.
-- Jarek -- Jarosław Owsiewski 2016-11-15 11:31 GMT+01:00 Nick Fisk <[email protected]>: > Hi All, > > > > Just a slight note of caution. I had been running the 4.7 kernel (With > Ubuntu 16.04) on the majority of my OSD Nodes, as when I installed the > cluster there was that outstanding panic bug with the 4.4 kernel. I have > been experiencing a lot of flapping OSD’s every time the cluster was put > under heavy load. It mostly seemed to occur when the OSD was asked to > delete a large number of objects, as in fstriming RBD’s, deleting snapshots > or sometimes when backfilling and the PG is removed from the source OSD. > > > > I noticed that a couple of nodes which were running the 4.4 kernel from > Ubuntu, never seemed to flap and so rolled back all other nodes to 4.4 as > well. After this I have not seen a single OSD flap so far. Unfortunately, I > couldn’t see any reason for the flapping and/or have a reason why 4.4 seems > to be more stable than 4.7, but I thought I would share this in case anyone > is having similar issues. Also if there is a problem with newer kernels, it > may not be something that was introduced with 4.7, but perhaps maybe 4.5 or > 4.6. > > > > Nick > > > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >
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