[Linux-cluster] Configuring failover time with Red Hat Cluster

[Parvez Shaikh]

Hello Christine,

Thanks for the link enlisting various documents, I have RHC running over
RHEL 5.5 and has been working fine. However I would greatly appreciate, some
document or pointers which help me in estimate failover time or adjust it;
if that is possible.

I have been through Administration Guide and could not find how I can adjust
it.

Thanks,
Parvez

On Tue, Jul 5, 2011 at 5:58 PM, Christine Caulfield <ccaulfie at redhat.com>wrote:

> That's a *very* old document. it's from 2003 and refers to RHEL2.1 .. which
> I sincerely hope you weren't planning to implement.
>
> Before you do anything more I recommend you read the documentation for the
> actual version of clustering you are going to install
>
> https://access.redhat.com/**knowledge/docs/Red_Hat_**Enterprise_Linux/<https://access.redhat.com/knowledge/docs/Red_Hat_Enterprise_Linux/>
>
> Chrissie
>
>
> On 05/07/11 12:32, Parvez Shaikh wrote:
>
>> Hi all,
>>
>> I was trying to find out how much time does it take for RHCS to detect
>> failure and recover from it. I found the link -
>> http://www.redhat.com/**whitepapers/rha/RHA_**ClusterSuiteWPPDF.pdf<http://www.redhat.com/whitepapers/rha/RHA_ClusterSuiteWPPDF.pdf>
>>
>> It says that network polling interval is 2 seconds and 6 retries are
>> attempted before declaring a node as failed. I want to know can we tune
>> this or configure it, say instead of 6 retries I want only 3 retries.
>> Also reducing network polling time from 2 seconds to say 1 second (can
>> it be less than 1 second, which I think would consume more CPU)?
>>
>> Also I have a script resource and I see it invoked with status argument
>> after every 30 seconds, can we configure that as well?
>>
>> Failover also involve fencing, any pointers on how can we control /
>> configure fencing time would also be useful,I use bladecenter fencing,
>> IPMI fencing as well as UCS fencing.
>>
>> Thanks,
>> Parvez
>>
>>
>>
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>>
>
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