topic Re: Adding to a two node cluster in Operating System - HP-UX

Adding to a two node cluster

Gene Kornacki_3 — Wed, 08 Dec 2004 10:00:37 GMT

I currently have a very stable 2 node cluster consisting of 2 L2000's and the Storageworks 2100. Connected SCSI. What do I have to do in order to connect a third and fourth machine to the disk?

Also, what if I wanted to put two rp series machines with the L's? Will that create a problem?

Re: Adding to a two node cluster

Geoff Wild — Wed, 08 Dec 2004 10:05:08 GMT

The only issue I see is the ability for all system to see the same storage - with SCSI cables. All servers must have access to the cluster lock (unless you go for a quorom server instead). Fibre attached would be better. No issue mixing those platforms. You need to have the same OS/MC/SG versions on all nodes.

BTW - you do NOT have to have a packge be able to run on all nodes - example - package A only runs on L Class, and Package B only runs on RP's - if you want.

Rgds...Geoff

Re: Adding to a two node cluster

Gene Kornacki_3 — Wed, 08 Dec 2004 10:09:00 GMT

That's what I thought. I was thinking perhaps there might be a controller to put between the array and the machines that they would attach to and then that controller would access the array. Does this black box exist?

Re: Adding to a two node cluster

Tom Danzig — Wed, 08 Dec 2004 10:54:08 GMT

FYI, you can eliminate the cluster lock disk if the cluster has 3 or more nodes so you can eliminate that as a concern. More than 4 and you would have to use and quorum server.