[Linux-cluster] Please settle a bet for me

Digimer lists at alteeve.ca
Tue Jan 8 01:24:34 UTC 2013

On 01/07/2013 05:29 PM, Sam Wilson wrote:
> Hi Bill,
> As far as I have experienced under pacemaker this is true in most cases.
> EG: Two nodes running a master/slave httpd will fail over without fencing.
> However, if for example your nodes are also using GFS2 and something
> goes wrong then you will find your filesystem locked by DLM which will
> obviously break fail over for services on that filesystem.
> In short, best to configure fencing unless this is a lab environment
> your willing to break!
> Cheers,
> Sam

DLM absolutely requires fencing, but even without it, a production
cluster without fencing is a bad day waiting to happen. Please always
use fencing... It will save you far more headache in the long run.

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