Is there anyway for you to provide debug logs (i.e. debug rbd = 20) from your rbd CLI and qemu process when you attempt to create a snapshot? In v9.2.0, there was an issue [1] where the cache flush writeback from the snap create request was being blocked when the exclusive lock feature was enabled, but that should have been fixed in v9.2.1. [1] http://tracker.ceph.com/issues/14542 -- Jason Dillaman ----- Original Message ----- > From: "Christoph Adomeit" <Christoph.Adomeit@xxxxxxxxxxx> > To: ceph-users@xxxxxxxx > Sent: Tuesday, March 8, 2016 11:13:04 AM > Subject: Does object map feature lock snapshots ? > > Hi, > > i have installed ceph 9.21 on proxmox with kernel 4.2.8-1-pve. > > Afterwards I have enabled the features: > > rbd feature enable $IMG exclusive-lock > rbd feature enable $IMG object-map > rbd feature enable $IMG fast-diff > > > During the night I have a cronjob which does a rbd snap create on each > of my images and then an rbd export-diff > > I found out that my cronjob was hanging during the rbd snap create and > does not create the snapshot. > > Also more worse, sometimes also the vms were hanging. > > What are your experiences with object maps ? For me it looks that they > are not yet production ready. > > Thanks > Christoph > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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