ceph.conf provides caching for rbd itself, but it has nothing to do with KVM afaik. But you can set caching parameters in disk section of vm template (cache=writeback, for instance). Take a look here http://ceph.com/docs/next/rbd/qemu-rbd/ for details. But it seems that this setting doesn't really help: http://www.sebastien-han.fr/blog/2012/08/26/ceph-benchmarks/ http://www.mail-archive.com/[email protected]/msg01284.html
-- Artem Salpagarov On Monday, July 29, 2013 at 6:12 PM, Jaime Melis wrote: > Hi Harald, > > you might have better luck asking this at the Ceph mailing list? > > regards, > Jaime > > > > On Tue, Jul 16, 2013 at 2:50 AM, Harald Rößler <[email protected] > (mailto:[email protected])> wrote: > > Hi, > > > > how I can enable the RBD caching for the VM's which have the underlying > > Ceph file system? At the moment I have add the the caching in the > > ceph.conf, but I'm not sure if this is the right place. > > > > ----- > > > > [global] > > rbd cache = true > > rbd cache size = 134217728 > > rbd cache max dirty = 100663296 > > rbd cache target dirty = 67108864 > > rbd cache max dirty age = 5 > > > > ----- > > > > Thanks > > Kind Regards > > Harald Roessler > > _______________________________________________ > > Users mailing list > > [email protected] (mailto:[email protected]) > > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org > > > > -- > Join us at OpenNebulaConf2013 (http://opennebulaconf.com/) in Berlin, 24-26 > September, 2013 > -- > Jaime Melis > Project Engineer > OpenNebula - The Open Source Toolkit for Cloud Computing > www.OpenNebula.org (http://www.OpenNebula.org) | [email protected] > (mailto:[email protected]) > _______________________________________________ > Users mailing list > [email protected] (mailto:[email protected]) > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org > >
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