[Linux-cluster] Network hiccup + power-fencing = both nodes godown (redhat cluster 4)

[Jeff Harr]

Patrick, this is awesome.  Here are my numbers:

[root at server1 ~]# cat /proc/cluster/config/cman/hello_timer
5
[root at server1 ~]# cat /proc/cluster/config/cman/deadnode_timeout
21
[root at server1 ~]#

I'm assuming these are seconds.  I think if I increase the
deadnode_timeout to maybe 120, then a network hiccup or major glitch
(like a reboot of a switch) could be ignored.

Thanks again!
Jeff

-----Original Message-----
From: linux-cluster-bounces at redhat.com
[mailto:linux-cluster-bounces at redhat.com] On Behalf Of Patrick Caulfield
Sent: Tuesday, January 17, 2006 7:58 AM
To: linux clustering
Subject: Re: [Linux-cluster] Network hiccup + power-fencing = both nodes
godown (redhat cluster 4)

Jeff Harr wrote:
> I thought about a crossover cable :)  But I think that, these being
> blade servers, there's no connection in the back for that.  I could be
> wrong though - I just don't have the hardware around to look at right
> this second (its in a datacenter).
> 
> One thing on the heartbeats: the message log says "missed too many
> heartbeats".  Off-hand, do you know where the number of heartbeats is
> configured?

/proc/cluster/config/cman/hello_timer
/proc/cluster/config/cman/deadnode_timeout

-- 

patrick

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