topic Re: 3 node cluster question in Operating System - HP-UX

3 node cluster question

likid0 — Wed, 24 Oct 2007 02:22:37 GMT

Hy,

I have a question about a 3 node cluster.

lets say that you have nodes a, b and c.

And you have services x,y

If i want to run x on a and have b as a failover
and run y on c and have b as a failover
so x can never go to c and y can never go to a

if you want this configuration, is it necesary that all the nodes see all the disks,vgs from the 3 nodes ?

or you can get away only whit:

a whit disks,vgs for service x
b with disks,vgs for services x and y
c with disks,vgs for services y

?

thnx

Re: 3 node cluster question

Mike Shilladay — Wed, 24 Oct 2007 02:58:44 GMT

Hi,

Your minimal solution should work as you state, however, if you configure all nodes with all vgs you at least have the option of a third node to run the package on should it all go pear shaped.

Mike.

Re: 3 node cluster question

F Verschuren — Wed, 24 Oct 2007 03:01:26 GMT

I had a old 11.00 situation that was running on autoraits you can create the cluster like you discribed whitout problems.

I advice to use a quorem server and not the lock disk, I can remeber that the cluster lock disk where working but that they have caused a problem in the end....

Re: 3 node cluster question

likid0 — Wed, 24 Oct 2007 05:07:40 GMT

Ok, thnx for the info

Re: 3 node cluster question

Rita C Workman — Wed, 24 Oct 2007 06:21:38 GMT

your plan is fine for the scenario you describe.
In cases where you must keep certain resources secured from others, because company a owns server a and company c owns server c, and by extension their disk...then your plan is exactly correct to secure them even at the disk level from one another.

Just make sure node B can handly running both, with no performance issues....that's the final trick.

Rgrds,
Rita