On Tue, Oct 26, 2004 at 04:52:12PM -0500, Matt Mitchell wrote: > Just seeking some opinions here... > > So in the effort to get something set up quickly I think I am going to > try setting up a regular filesystem on top of LVM2. Since these disks > are shared, we'll at least have a warm-failover capability if the server > machine goes down. (If I have the energy I will set up cluster failover > to take care of that automatically too.) Question I have is, how does > clvmd impact this? Without it I know you have to force LVM2 to read the > VG information off of disk when moving partitions between nodes; does > clvmd make this step unnecessary? Also, is it possible to reliably > mount read-only a snapshot of a LV still mounted read-write on the other > node? (It seems like it should be.) You can use clvmd without GFS quite happily and it will certainly make sure that the LVM metadata is consistent across the cluster - that's it's job. You cannot mount a snapshot (even RO) on another node though. The snapshot needs to be kept informed about changes to the origin LV so it can read the data from the copy-on-write area. Clustered snapshots are being worked on. patrick
