Hello, That sounds pretty much to the question I've asked to this mailing-list last May (https://www.redhat.com/archives/linux-cluster/2009-May/msg00093.html).
We are in the same setup, already doing "Geo-cluster" with other technos and we are looking at RHCS to provide us the same service level. Latency could be a problem indeed if too high , but in a lot of cases (many companies for which I've worked), datacenters are a few tens of kilometers far, with a latency max close to 1 ms, which is not a problem. Let's consider this kind of setup, 2 datacenters far from each other by 1 ms delay, each hosting a SAN array, each of them connected to 2 SAN fabrics extended between the 2 sites. What reason would prevent us from building Geo-clusters without having to rely on a database replication mechanism, as the setup I would like to implement would also be used to provide NFS services that are disaster recovery proof. Obviously, such setup should rely on LVM mirroring to allow a node hosting a service to be able to write to both local and distant SAN LUN's. Brem 2009/6/3, Fajar A. Nugraha <fa...@fajar.net>: > > On Wed, Jun 3, 2009 at 6:36 AM, Jon Schulz > <jsch...@soapstonenetworks.com> wrote: > > I'm in the process of doing a concept review with the redhat cluster > suite. > > I've been given a requirement that cluster nodes are able to be located > in > > geographically separated data centers. I realize that this is not an > ideal > > scenario due to latency issues. > > For most purposes, RHCS would require that all nodes have access to > the same storage/disk. That pretty much ruled out the DR feature that > one might expect to get from having nodes in geographically separated > data centers. > > I'd suggest you refine your requirements. Perhaps what you need is > something like MySQL cluster replication, where there are two > geographically separated data centers, each having its own cluster, > and the two clusters replicate each other's data asynchronously. > > -- > Fajar > > -- > Linux-cluster mailing list > Linux-cluster@redhat.com > https://www.redhat.com/mailman/listinfo/linux-cluster >
-- Linux-cluster mailing list Linux-cluster@redhat.com https://www.redhat.com/mailman/listinfo/linux-cluster