[Pacemaker] recovering from split brain

Jane Du (jadu) jadu at cisco.com
Wed Oct 3 18:03:04 EDT 2012

Re-send. Will be appreciate if someone could shed some light on this.

-----Original Message-----
From: Jane Du (jadu) 
Sent: Friday, September 28, 2012 4:53 PM
To: The Pacemaker cluster resource manager
Subject: [Pacemaker] recovering from split brain

Use heartbeat and pacemaker for two node HA. We don't configure the fencing or quorum because we let 
one of our module handle the split-brain recovering based on some important factors. However,
when recovering from two-node split brain situation, CRM still tries to elect a node to be active to run the resource and sometimes
the decision is conflict with what our master module makes and triggers an unnecessary switch over.
Is there a parameter that I can program to delay CRM to make the decision or not to make decision when recovering from split brain?

Thanks for your help,


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