[libvirt-users] Best filesystem/nfs options for shared storage?

Is there a guide, or some suggestions for what filesystem to use for VM storage? I chose the standard ext3 on CentOS but I'm wondering if it makes more sense to look at ext4 or XFS for performance reasons? Does anyone tweak the ext3 journaling options for libvirt to speed things up? What about NFS export/mount options? What do your fstab mount lines look like? Is there a better rsize/wsize than the default? -- Scott Baker - Canby Telcom System Administrator - RHCE - 503.266.8253