[Linux-cluster] IP-based tie-breaker on a 2-node cluster?

[gordan at bobich.net]

On Thu, 17 Apr 2008, Andrew Lacey wrote:

>> but you could also just tune deadnode_timeout to be different on both
>> nodes: this results the behaviour Gordan told - the node that has smaller
>> deadnode_timeout would fence first.
>
> Would this work in a situation where the switch was down for a few
> minutes? Suppose the deadnode_timeout is 30 seconds on one node and 60
> seconds on the other. So, after 60 seconds of switch downtime, both nodes
> would be trying to fence. If the switch comes up after being down for 5
> minutes, they would still immediately fence each other. Or am I not
> thinking about this correctly?

There's an argument that if your switch is down for 30 minutes, you 
have bigger problems. If you have a 30 minute switch outage, the chances 
are that you can live with the node power-up time on top of that.

Gordan