On Thu, 2006-07-13 at 12:14 -0500, Stephen Kirkpatrick wrote: > Thanks for the reply. I wondered if it was possible to have HA for > stateful applications. At least > I know my options better now. I can tolerate brief downtime, like the > time it would take a failover > node to take over, although no downtime would have been preferred. > > Any suggestions on HA solutions for a non-SAN deployment? You don't need a SAN if you don't intend to share data. If you intend to share data but do not want a SAN, you'll need to set up DRBD or CLVM+Cluster Mirroring+GNBD (Note: cluster mirroring is still in a bit of development). The main advantage to the latter approach is simultaneous read/write access from both machines in the cluster. The advantage to DRBD is that it is easier to set up. Alternatively, you could use NFS mounts from a good NAS (a NetApp filer, as an example) as your source for shared dat. You can use linux-cluster or Linux-HA to do failover with or without a SAN; the choice is up to you. Linux-HA supports DRBD out of the box, but CLVM will still need parts of linux-cluster running in order to operate. If you want support, you can use Red Hat Cluster Suite (which is effectively linux-cluster w/ support). Good luck! -- Lon -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
