topic Re: MC/SG Clusterlock disk in Operating System - HP-UX

MC/SG Clusterlock disk

JOHN TURNER_2 — Wed, 30 Nov 2005 05:24:48 GMT

Morning, we are having trouble with the cluster lock disk on a three node servicenode cluster, Does anyone know how to change the clusterlock disk to a different disk. At present the system is reporting c16t0d0 and we want to change the clusterdisk to c3t0d0.

Any help would be appreciated

Cheers
John

Re: MC/SG Clusterlock disk

RAC_1 — Wed, 30 Nov 2005 05:37:41 GMT

There is tool that hp provides for this. Something as cminitlock or similar. another method would be shutdown cluster, update config file and pushing the changes to all nodes.

Re: MC/SG Clusterlock disk

Bernhard Mueller — Wed, 30 Nov 2005 06:14:07 GMT

John,

you cannot *move* the lock disk while the cluster is up and running. the cminitlock utility is only used for re-initializing a prevoiusly failed lock disk.

to change the lock disk and its vg you need to stop the whole cluster.

Regards
Bernhard

Re: MC/SG Clusterlock disk

Geoff Wild — Wed, 30 Nov 2005 08:53:36 GMT

You need to re-apply the cluster config if you are changing the cluster lock.

cmgetconf cluster.ascii

vi cluster.ascii and set the cluster lock disk.

cmapplyconf -C cluster.ascii

Rgds...Geoff

Re: MC/SG Clusterlock disk

simon_164 — Wed, 30 Nov 2005 08:55:35 GMT

John,
same answer over here, shutdown the cluster and make the configuration then rebuild it.
try to run the packages on the third node. build the cluster with a different lock disk then readd the packages to the whole nodes. correct me if i'm wrong!! and submit me points if i'm right.

Re: MC/SG Clusterlock disk

Marco Santerre — Wed, 30 Nov 2005 10:20:00 GMT

Thogh not completely helpful for this matter, I thought that a cluster lock disk had to be defined in the case where you had a two-node cluster, that any cluster with more than two-node could do without the cluster lock disk?

Re: MC/SG Clusterlock disk

Scott Dunkley — Wed, 30 Nov 2005 10:41:56 GMT

your right but what happens if one node fails? He then has a two node cluster.

Re: MC/SG Clusterlock disk

Geoff Wild — Wed, 30 Nov 2005 12:51:57 GMT

cluster lock supported up to 4 nodes....cluster quorom server needed for more then 4 nodes but also can be used for less then 4 node clusters.

Rgds...Geoff