On Mon, Mar 28, 2011 at 3:31 PM, Marcin M. Jessa <lists@xxxxxxxxx> wrote: > How is OCFS2 compared to CLVM? different layers, can't compare. CLVM (aka cLVM) is the cluster version of LVM, the volume manager. the addition of a userspace lock manager lets you do all volume management (create/delete volumes, resize them, add/remove physical devices, etc.) online on any machine and all others will see the change. since locks are only needed while modifying the volume layout, there's no overhead during normal operation. OCFS2 is a filesystem. specifically, a Cluster filesystem. that means that the same storage can be mounted by several machines and all of them will see the same data consistently. distributed locks are needed for any modification, and cache strategies have to be complex and tied to such locks. scalability is good, since there's no central node; but ultimately limited to the lock performance. Usually you store cluster filesystems on cluster volumes on cluster storage. -- Javier -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
