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

[Christine Caulfield]

I forgot to paste the URL, sorry!

http://people.redhat.com/ccaulfie/docs/CmanYinYang.pdf

Chrissie

On 05/07/11 14:20, Christine Caulfield wrote:
> Hiya,
>
> I don't have the URL to have but I'm pretty sure there's something in
> the Red Hat knowledge base about calculating failover times. You'll need
> to have paid support to get at it.
>
> Failing that here's a document I wrote that talks about configuring the
> insider bits of openais and cman. "man 5 openais.conf" is also helpful.
>
> I hope this helps :-)
>
> Chrissie
>
> On 05/07/11 13:43, Parvez Shaikh wrote:
>> 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
>> <mailto: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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