Quorum server for multiple clusters

[amit mehta_2]

Hi,

Can i have the same quorum server for multiple clusters at the same time.
i mean to say that Is it possible to have one quorum server resolving cluster reformation conflicts of multiple clusters at the same time ? or it can handle the conflicts for one cluster at a time.

~amit

[Ludovic Derlyn]

Hi,

Yes it's possible
I have this configuration, i have 6 clusters and 1 quorumserver for all

Regards

L-DERLYN

[Steven E. Protter]

Shalom,

Possible. Yes.

Good idea?

Single point of failure that can bring down all your clusters? Thats not high availability.

As I recall you can install quorum server on an inexpensive linux system. I'd recommend having more than 1. 1 for each cluster, thats a business decision.

Shmuel

[melvyn burnard]

certainly possible, lots of site do this.
The only thing to remember is that the cluster nodes must be able to contact the QS via the network whenever an arbitration decision is required, i.e. when exactly 50% of the cluster nodes survive after a failure. If you have a network issue tha tprevents this, it has the same effect as the node being unable to grab the cluster lock disc.

[Stephen Doud]

If you are adding a new cluster of nodes to the quorum server:

1) Update /etc/cmcluster/qs_authfile with the new hostnames of each new cluster/node
.
2) Make the quorum server re-read the authentication file:
# /usr/lbin/qs -update

3) Do not restrict network traffic on port 1238 for the new cluster/nodes.