[Linux-cluster] Heartbeat tolerance on busy networks (RHCS3)

[Pavlos Parissis]

On Tue, 19 Feb 2008 17:17:08 +0000
Karl Podesta <kpodesta at redbrick.dcu.ie> wrote:

> Hi there, 
> 
> I'm looking to increase the tolerance level for heartbeats in a RHEL 4 U4
> cluster. The network gets unavoidably busy at a single point each day. 
> Short of seperating heartbeats onto a seperate network, is there any way 
> I can increase the tolerance to prevent fencing due to missed hearbeats
> during this busy period?
> 
> I've tried increasing deadnode_timeout, using the following in cluster.conf:
> <cman deadnode_timeout="21">
> 
> (as per instructions in the FAQ for including it in the cman section, and 
> for using cman_tool to update versions & transferring it between nodes)
> ... but unfortunately this has given me configuration errors when I try
> to restart the cluster services so I'm forced to take the option out. 
It would be much better and useful for everyone to post your clutser.conf and the error you get.

You can always test your configuration prior using it by using rg_test tool.

Cheers,
Pavlos