[Linux-cluster] DR node in a cluster

[Paras pradhan]

Yes because of the licensing issue we are now limited to a single San
but not in the future.

Thanks guys for the replies
Paras

On Thursday, July 7, 2011, Jankowski, Chris <Chris.Jankowski at hp.com> wrote:
> Paras, With your SAN on one site, what is the point of having a stretched cluster?If your datacenter, where the SAN is located, burns down, you’ve lost all your data.The DR servers in the DR datacenter are kind of useless without the data on shared storage. Regards, Chris  From: linux-cluster-bounces at redhat.com [mailto:linux-cluster-bounces at redhat.com] On Behalf Of Paras pradhan
> Sent: Thursday, 7 July 2011 03:17
> To: linux clustering
> Subject: Re: [Linux-cluster] DR node in a cluster Chris, All the nodes are connected to a single SAN at this moment through fibre.  @steven: -- If you don't have enough nodes at a site to allow quorum to be
> established, then when communication fails between sites you must fence
> those nodes or risk data corruption when communication is
> re-established,
> ----- Yes true, but in this case a single node can made the cluster quorate. (qdisk vote=3 ,node votes=3, total=6) which is not recommened I guess (?).
> SteveOn Wed, Jul 6, 2011 at 11:46 AM, Jankowski, Chris <Chris.Jankowski at hp.com> wrote:Paras, A curiosity question: How do you make sure that your storage will survive failure of *either* of your site without loss of data and continuity of service?What storage configuration are you using? Thanks and regards,
> Chris From: linux-cluster-bounces at redhat.com [mailto:linux-cluster-bounces at redhat.com] On Behalf Of Paras pradhan
> Sent: Thursday, 7 July 2011 02:15
> To: linux clustering
> Subject: [Linux-cluster] DR node in a cluster Hi, My GFS2 linux cluster has three nodes. Two at the data center and one at the DR site. If the nodes at DR site break/turnoff, all the services move to DR node. But if the 2 nodes at the data center lost communication with the DR node, I am not sure how does the cluster handles the split brain. So I am looking for some recommendation in this kind of scenario. I am usig Qdisk votes (=3) in this case. --Here is the cman_tool stat