> > > > You don't need a replication system there. Use an SAN :) > > > > And now we have a SPOF - SAN or NAS... how to get beyond that? > > > If you do not have or want a SAN, you can investigate one of the replicated file systems or block devices. Here are some: - Radiant Data PeerFS (we had a customer running this but had too many problems and had to disable it.) - NetVault Replicator (http://www.bakbone.com/products/replication/) - looks pretty good, but havent tried it myself. They even have a whitepaper on using Replicator with GFS on the above page. - DRBD (Distributed Replicated Block Device) - www.drdb.org and with commercial support at http://www.linbit.com/linhac_drbd.html?L=1 They are my preferred choice (based on a hands-off evaluation) since they are OSS, but the documentation is not quite there yet, relative to the other two. If anyone has had good/bad experiences with these or any other replicated block devices / file systems, myself (and I am sure the original author) would like to hear them. I have a significant number of smaller customers who want HA and RHCS, but a SAN is just not a cost-effective option in those environments. Riaan -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
