[Pacemaker] Are master/slave resources started in parallel on two nodes?

Bob Schatz bschatz at yahoo.com
Thu Mar 17 17:10:00 EDT 2011


I am running Pacemaker 1.0.9 and Heartbeat 3.0.3.

I have a two node cluster and have configured master/slave resources as follows:

       params ss_resource="SSMKP00009010REPK" 
ssconf="/var/omneon/config/config.MKP00009010REPK" \
        op monitor interval="3s" role="Master" timeout="7s" \
        op monitor interval="10s" role="Slave" timeout="7" \
        op stop interval="0" timeout="20" \
        op start interval="0" timeout="300"

       ms ms-SSMKP00009010REPK SSMKP00009010REPK \
         meta clone-max="2" notify="true" globally-unique="false" 

       location ms-SSMKP00009010REPK-master-w1 ms-SSMKP00009010REPK \
         rule $id="ms-SSMKP00009010REPK-master-w1-rule" $role="master" 100: 
#uname eq mgraid-mkp00009010repk-1

If I start heartbeat on both nodes at the same time, will the START action of 
the ss agent execute on both nodes of my cluster at the same time or are the 
STARTs serialized across the cluster?

What about if heartbeat/Pacemaker are already running and the above resources 
are added online via crm?   Would the STARTs be executed in parallel or are they 

Not sure if it matters in this case but I already have lrmd max-children set to 

Thanks in advance for the help,

Bob Schatz


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