[Linux-cluster] GFS questions to have a final decision

[Lon Hohberger]

This was probably answered already, but...

On Sun, 2005-06-05 at 14:40 +0200, Yazan Al-Sheyyab wrote:
> --------------------------------
>           In your case you will need Three (3) GFS entitlements, One
> (1) for each
>           Node which makes it two and One (1) for the lock server, in
> other words
>           you will also need a third server. 
> ------------------------------------------------
>  
>   and after asking why --->  he answered the following :

More simply, there is no 2-node method of operation for GFS 6.0.  You
need three nodes / entitlements.  In this configuration, all nodes
should act as lock servers.

>    ****  and can i use a software like  MC service guard with 
> RedHat  as used with the UNIX and HP-UX systems ?

You can use Red Hat Cluster Manager for failover, too.  Having a GFS
entitlement includes Cluster Suite, IIRC.

You can also do-it-yourself with the linux-cluster project's code:

http://sources.redhat.com/cluster

The new CMAN infrastructure will allow you to run GFS on only two nodes.
This will all be released sometime soon as a layered product for RHEL4.

-- Lon