Serviceguard

Re: reasons to bring down cluster

 
khilari
Regular Advisor

reasons to bring down cluster

Hi Guys, i am looking for situations where i have to bring down my cluster environment to perform necessary changes.
Sometime we can make changes online but which situations require cluster shutdown.
Thanks
14 REPLIES 14
Stephen Doud
Honored Contributor

Re: reasons to bring down cluster

I recently submitted a document for the customer Knowledge Database that discusses this very topic. It is titled, "HPUX Serviceguard - permissible online cluster and package modifications". It summarizes all cluster and package parameters and other cluster admin tasks on currently supported versions ie A.11.16-A.11.19. Unfortunately, it has not made it through the editing function yet, so please email me to request a copy.
Steven E. Protter
Exalted Contributor

Re: reasons to bring down cluster

Shalom,

1) Changes to shared storage.
2) Updates that impact Service Guard.
3) Loss of hardware risks data corruption (precautionary, SG still runs but the risk is too high to remain in operation)

Neither is mandatory but the purpose of clustering is to avoid other down time issues.

SEP
Steven E Protter
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
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khilari
Regular Advisor

Re: reasons to bring down cluster

Hi Stephen Doud, thanks for your post. What is your email where i can ask for the document.
Thanks
Rita C Workman
Honored Contributor

Re: reasons to bring down cluster

Not sure about your SG version, and this may not be complete...but...

Generally the must be halted if you want to change:

Timing Parameters
Cluster lock configurations
Changing IP address
Changing serial device files

That's all I can think of real quick....

Regards,
Rita
Ron Irving
Trusted Contributor

Re: reasons to bring down cluster

Pardon me for jumping in...I'd like a look at that doc too!! I just inherited an SG environment here at a new job.

Thnx!!!

No pts for this please.
Should have been an astronaut.
Rita C Workman
Honored Contributor

Re: reasons to bring down cluster

...and a couple obscure reasons:

Moving the data center
Testing to ensure your cluster will start up everything as it should properly.

/Rita
Viktor Balogh
Honored Contributor

Re: reasons to bring down cluster

The cluster must also be stopped if you want to reconfigure it, (eg. adding/removing a new node)
****
Unix operates with beer.
Stephen Doud
Honored Contributor

Re: reasons to bring down cluster

stephen.doud@hp.com
Gordon Sjodin
Frequent Advisor

Re: reasons to bring down cluster

Cluster related patching requires downtime.