cluster lock with 3rd node

[Shawn Miller_2]

I am going to add node3 to my existing cluster and pkg2 that fails over from node3 to node2. Currently I have pkg1 that fails over from node1 to node2 on a two node cluster. The cluster lock disk is a disk that is part of pkg1 (there is critical data on it). Would it be a problem to keep this disk as the cluster lock and give node3 access to it. Could this ever cause a problem with pkg1 or the data on the cluster lock. Also, if anyone has an easier and/or better way of doing this I would appreciate the advice.

[Sanjay_6 · Accepted solution]

Hi Shawn,

The whole purpose of having a lock disk is that it is used as a tie breaker in the case of a heartbeat loss between nodes, primarily during a network outage. So the lock disk is accessible from all the nodes in the cluster. As far as the data on the lock disk is concerned, the lock disk is part of a vg and the data on that vg is accessible to the package which has that vg as part of its cluster configuration. So if at present you are not using the cluster lock disk vg, you can use this vg to put data for the new package and let that data be accessed on node3.

Hope this helps.

Regds

[Geoff Wild]

You can give access to the 3rd node to the vg with the cluster lock. You don't have to give access to the package that the cluster lock is in to node3. It will cause no harm whatsoever. Just the vg.

Rgds...Geoff