[Pacemaker] very urgent

[Andreas Kurz]

Andrew Beekhof wrote:
> 
> On Feb 16, 2009, at 11:53 AM, Glory Smith wrote:
> 
>>
>>
>> having an unreliable stonith mechanism is worse than not having one at
>> all.
>>
>> what if your resource fencing has a bug? its the same problem.
>>
>> reliable fencing is a fundamental requirement of the cluster.
>>
>> i understand . but If i can do both (node as well as resource fencing)
>> then there is very very rare chance that both will fail at same time.
> 
> You can have multiple stonith devices.  If one fails, we just try the next.

That sounds interesting ... is there somewhere an example how to
configure this? Especially how to configure the order of presedence?

Regards,
Andreas

> 
>>
>> i will again say it would be really good if something can be done to
>> implement resource fencing in openais-pacemaker. dont you agree with
>> this.
> 
> I get the feeling that by "resource fencing", you just mean scsi
> reservations which are already possible in the current framework.
> 
> 
>> 2) no, it cant.
>> it wont have quorum and therefor isn't allowed to start cluster resources
>>
>> if i set no-quourm to stop (Which is default)  then i feel following
>> things will happen
>>
>> 1) resouces will be stopped at all nodes who belong to  no-quourm
>> partition and fail over to a nodes which have quorum.
>>
>> 2) All nodes of no-quorum partion will be stonithed by  nodes having
>> quorum.
>>
>> am i right?
> 
> correct.  although 2) usually happens a lot faster than 1).
> 
>>
>> if openais -pacemaker provide something  for resouce fencing we would
>> have completely ruled out  above possiblities  Please share your view.
>>
>>
>>
>> _______________________________________________
>> Pacemaker mailing list
>> Pacemaker at oss.clusterlabs.org
>> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>>
>> _______________________________________________
>> Pacemaker mailing list
>> Pacemaker at oss.clusterlabs.org
>> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> 
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Pacemaker mailing list
> Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker


-- 
: Andreas Kurz					
: LINBIT | Your Way to High Availability
: Tel +43-1-8178292-64, Fax +43-1-8178292-82
:
: http://www.linbit.com

DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.

This e-mail is solely for use by the intended recipient(s). Information
contained in this e-mail and its attachments may be confidential,
privileged or copyrighted. If you are not the intended recipient you are
hereby formally notified that any use, copying, disclosure or
distribution of the contents of this e-mail, in whole or in part, is
prohibited. Also please notify immediately the sender by return e-mail
and delete this e-mail from your system. Thank you for your co-operation.