On Mon, Mar 01, 2010 at 12:26:15AM +0100, Jakov Sosic wrote: > On 02/26/2010 06:29 PM, Jakov Sosic wrote: > > Hi. > > > > I'm using Xen on RHEL cluster, and I have strange problems. I gave raw > > volumes from storage to Xen virtual machines. With windows, I have a > > problem that nodes don't see the volume as same one.... for example: > > > > clusternode1# clusvcadm -d vm:winxp > > clusternode1# dd if=/dev/mapper/winxp of=/node1winxp > > clusternode2# dd if=/dev/mapper/winxp of=/node2winxp > > clusternode3# dd if=/dev/mapper/winxp of=/node3winxp > > > > When I download these files and diff them, they all three differ. > > > > Also, sometimes very strange things happen. For example I download some > > file into winxp, shut it down, then start it on another node, and file > > is missing?!?!?!?! > > > > Should I use CLVM and not raw volumes from storage? Why is this happening? > > It seems that CLVM is solution (migrated whole cluster to clvm today), > and that the bug is double caching (both domU and dom0 caching), and > that bugs like this occur when using raw LUNs: > https://bugzilla.redhat.com/show_bug.cgi?id=466681 > Oh yeah, this bug can definitely affect you if you're accessing the same disk images from both domU and from dom0. -- Pasi -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
