[Pacemaker] stonith xenU

[Aleksey Mykhailov]

Hello!

I've two node cluster created from two xenserver guests
each node located on the different dom0
node0 on dom0-0
node1 on dom0-1

for stonith I'm going use this http://code.google.com/p/fence-xenserver/

but questions probably not related to this details , it mostly theoretical
so,
I tried to block network connections with iptables on node0:
iptables -A OUTPUT -d node1 -j REJECT
iptables -A INPUT -s node1 -j REJECT

and as result  - all cluster resources  was started on the both nodes
drbd was switched to the Primary/Unknown state on both nodes too and so on
...

and as far as I understood if I will have stonith enabled pacemaker kill one
of the cluster node (am I right?)
but how pacemaker decide which node to kill ?
in my case node0 and node1 is up and running, which of them will be killed ?
how pacemaker know that another node is up and it is only network issue?
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