Le lundi 03 juin 2013 à 08:04 -0700, Gregory Farnum a écrit : > On Sunday, June 2, 2013, Dominik Mostowiec wrote: > Hi, > I try to start postgres cluster on VMs with second disk > mounted from > ceph (rbd - kvm). > I started some writes (pgbench initialisation) on 8 VMs and > VMs freez. > Ceph reports slow request on 1 osd. I restarted this osd to > remove > slows and VMs hangs permanently. > Is this a normal situation afer cluster problems? > > > Definitely not. Is your cluster reporting as healthy (what's "ceph -s" > say)? Can you get anything off your hung VMs (like dmesg output)? > -Greg > > > -- > Software Engineer #42 @ http://inktank.com | http://ceph.com > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com Hi, I also see that with Xen and kernel RBD client, when the ceph cluster was full : in fact after some errors the block device switch in read-only mode, and I didn't find any way to fix that ("mount -o remount,rw" doesn't work). I had to reboot all the VM. But since I don't have to unmap/remap RBD device, I don't think it's a Ceph/RBD problem. Probably a Xen or Linux "feature". Olivier _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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