[Ocfs2-users] Question about eth communication for ocfs2

[Karim Alkhayer]

In a two-node setup, node 0 will survive, because that's the node with the
lowest node number (as defined in cluster.conf).

 

You may want to think about adding a third [FAKE] node; if this is a
feasible workaround, then only the troublesome node should fence itself.

 

-----Original Message-----
From: ocfs2-users-bounces at oss.oracle.com
[mailto:ocfs2-users-bounces at oss.oracle.com] On Behalf Of Alain.Moulle
Sent: Tuesday, February 08, 2011 3:06 PM
To: ocfs2-users at oss.oracle.com
Subject: Re: [Ocfs2-users] Question about eth communication for ocfs2

 

Hi,

 

I have give it a try :

 

linkcom PtP between node1 and node2

IO traffic on OCFS2 on both sides

unplug the PtP cable from both nodes

=>both IO traffic on OCFS2 are stalled

=>after a short while, node2 self-fences, =>whereas a short while after the
self-fence of node2 , IO traffic

     on node1 starts again

 

So in fact, you confirm that there is no "slave or master" question around
this self-fence, but it will always be the larger node number in
/etc/ocfs2/cluster.conf which will self-fence ?

 

Thanks for your confirmation.

Alain

 

Sunil Mushran a écrit :

>> 

>> And a relative question :

>> 

>>      if there is a network breakdown on the only communication link 

>> for

>> ocfs2

>>      in a two-nodes cluster, what is the behavior :

>> 

>>      - will both nodes decide to suicide ?

> 

> In a 2 node cluster, if the commlink breaks, the larger node number 

> fences.

 

 

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