[Linux-cluster] a doubt on quorums

[Castang Jerome]

Kumaresh Ponnuswamy a écrit :
> Hi,
>  
> I have a problem with my cluster and quorum settings and any help will 
> be appreciated.
>  
> I have a five node cluster with quorum vote of 1 for all the 5 nodes. 
> They have a GFS shared file system on all the five nodes, and, two 
> domains and two services involving two nodes.
>  
> When I shut down the 3 nodes that don't participate in the two domains 
> and clustered services, both the services stop and fail to start when 
> tried manually also.
>  
> I guess it is something to do with the quorum settings, but not sure 
> on the way forward.
>  
> The environment is on RHEL AS 4U2 with GFS 6.1 and RHCS 4U2.
>  
> Regards,
> Kumaresh
>
> ------------------------------------------------------------------------
If you have 3 nodes of 5 falling down, your cluster becomes a two node 
cluster.
So, as it is written in documentation, it's a "special cluster" and it 
has to be specified (in cluster.conf or by this command "can_tool join -2")
When you have a two node cluster, it is possible that  each node  is  
isolated (this is the "splitbrain" ).


-- 
Jerome CASTANG
Tel: 06.85.74.33.02
mail: jerome.castang at adelpha-lan.org

---------------------------------------------
Comme le dit un vieu proverbe chinois: RTFM !