You're wrong. You can do Live Migration with RBD without doing block live migration. RBD images also live on any ceph (libvirt / kvm) - client, without the need to move physical data. Think of it as an iSCSI volume. RBD is the way to go, you don't want or need cephFS here at all, unless you want to store qemu-img files in cephfs, which is a bad idea to start with. The only thing I don't know if openstack supports base images on ceph, I know openstack volumes work flawlessly with RBD, I have one installation right here that works very well. On 04/18/2013 06:54 AM, Li, Chen wrote: > It is just a test environment. > I'm using Ceph FS is only because I want to integrate Ceph with all OpenStack environment. > And a shared FS can let me do the live-migration but not just block-live-migration. > > I know Ceph FS is not production ready. > So, the only suggestion is not to use it? > Anymore? > > > Thanks. > -chen > > > > -----Original Message----- > From: ceph-users-bounces@xxxxxxxxxxxxxx [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Wido den Hollander > Sent: Wednesday, April 17, 2013 6:27 PM > To: ceph-users@xxxxxxxxxxxxxx > Subject: Re: Unable to read file on Ceph FS > > Hi, > > On 04/17/2013 11:01 AM, Li, Chen wrote: >> Hi list, >> >> I'm working on ceph version 0.56.2. >> >> I have mount Ceph FS to two OpenStack compute Nodes for storing files >> and images for running instances. >> > > Why are you using CephFS for OpenStack? The recommendation is to use RBD as a backend for OpenStack. > > I recommend you read the docs regarding the OpenStack RBD installation: > http://eu.ceph.com/docs/master/rbd/rbd-openstack/ > > Wido > >> While I have successfully start several instances in the cloud, and >> all instances are started at compute-1. >> >> Now I enter into compute-2, and try to get into the "_base" directory, >> command "ls" just hang there and never response. >> >> But if I do the same command at compute-1, everything looks just fine. >> >> Anyone know why this happen? >> >> What should I do next ? >> >> Thanks. >> >> -chen >> >> >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > > -- > Wido den Hollander > 42on B.V. > > Phone: +31 (0)20 700 9902 > Skype: contact42on > _______________________________________________ > 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 > -- DI (FH) Wolfgang Hennerbichler Software Development Unit Advanced Computing Technologies RISC Software GmbH A company of the Johannes Kepler University Linz IT-Center Softwarepark 35 4232 Hagenberg Austria Phone: +43 7236 3343 245 Fax: +43 7236 3343 250 wolfgang.hennerbichler@xxxxxxxxxxxxxxxx http://www.risc-software.at _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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