On Mon, Jun 8, 2015 at 1:24 PM, Arnaud Virlet <avirlet@xxxxxxxxxxxxxxx> wrote: > Hi > > Actually we use libvirt VM with ceph rbd pool for storage. > By default we want to have "disk cache=writeback" for all disks in libvirt. > In /etc/ceph/ceph.conf, we have "rbd cache = true" and for each VMs XML we > set "cache=writeback" for all disks in VMs configuration. > > We want to use one ocfs2 volume on our rbd pool. For this volume we want set > cache=none. When we set cache=none in libvirt template for this hosts, it > doesn't work. Can you please describe this more specifically? Does the libvirt produce a launch string with cache=none or you are measuring the cache (mis)presence in some other way? The rbd_cache setting and cache=xxx for qemu should show a conjugate behavior. > The only way that's work is when we set "rbd cache = false" in > /etc/ceph/ceph.conf. > > How can I set cache=none just for one volume specifically without modifing > default settings in ceph.conf? > > > Regards, > > Arnaud > _______________________________________________ > 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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