[Ocfs2-users] 2 node OCFS2 clusters

[Joel Becker]

On Mon, Nov 16, 2009 at 08:55:38AM -0800, Luis Freitas wrote:
>   If this is true then I would sugest OCFS2 is not taking the best decision in this scenario.

	It's doing the best it can.  See, each node knows the other is
alive because of the disk heartbeat.  Thus they know the error is
network related.  But with only two nodes, there is no way to determine
who has the better network.

>   The node that still has network connectivity should survive instead of the lowest node number. Oracle CRS has heuristics to detect if the network is down and in this scenario the node that lost network conectivy is evicted. That is why it is required to use a switch between the two nodes, instead of a cross cable. 

	ocfs2 is a general purpose filesystem that allows a myriad of
network configurations.  It has never required a dedicated network
switch, nor will it, so relying on that isn't possible.

Joel

-- 

"The whole problem with the world is that fools and fanatics are always
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Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127