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Re: [Linux-cluster] cman & qdiskd



Hi Sherwyn,

We use a Hewlett-Packard MSA 1000, connected to our servers (nodes) by DLogic 2300 fibre channels, which, if you have a spare £10,000, is fine. The partition I use has been turned into a GFS filesystem (get the GFS tools from the RedHat Network) which enables the shared storage to be mounted, and more importantly, written to without fear of corruption.

We also use TeraStations for our NFS servers which I believe are somewhat cheaper. Depends on the 'criticality' of your setup.

Thanks,
Jon




Sherwyn Greene wrote:

Hi, I may not be able to help you with your problem, but maybe you can help
me with one.

1 What type of shared storage you have setup on your cluster?

I'm tring to setup a cluster with 2 nodes and one shared storage for web
pages & ftp Can you help me?

Thanks

Sherwyn Greene
Planner / I.T. Technician
Project Controls Dept.
Kentz-OJ's E&I Services J.V.
+1 (868) 648-0876

-----Original Message-----
From: linux-cluster-bounces redhat com
[mailto:linux-cluster-bounces redhat com] On Behalf Of Katriel Traum
Sent: Tuesday, October 17, 2006 2:12 PM
To: linux clustering
Subject: [Linux-cluster] cman & qdiskd

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Hello.

I've seen this subject on the list, but no real solutions.
I'm using Cluster 4 update 4, with qdiskd and a shared disk.
I've understood from the documentation and list that a "cman_tool status"
should reflect the number of votes the quorum daemon holds.

My setup is pretty straight forward, 2-node cluster, shared storage (AoE for
testing).
qdiskd configuration:
<quorumd interval="1" tko="5" votes="3" log_level="7" device="/dev/ether
d/e0.0" status_file="/tmp/qdisk-status">
               <heuristic program="ping 192.168.22.1 -c1 -t1" score="1"
interval="2"/>
               <heuristic program="ping 192.168.22.60 -c1 -t1"
score="1" interval="2"/>
               <heuristic program="ping 192.168.22.100 -c1 -t1"
score="1" interval="2"/>
       </quorumd>

cman_tool status shows:
[root n1 ~]# cman_tool status
Protocol version: 5.0.1
Config version: 8
Cluster name: alpha_cluster
Cluster ID: 50356
Cluster Member: Yes
Membership state: Cluster-Member
Nodes: 2
Expected_votes: 2
Total_votes: 2
Quorum: 2
Active subsystems: 4
Node name: n1
Node addresses: 192.168.22.201

qdiskd is running, scoring a perfect 3 out of 3, but no votes...
When disconnecting one of the nodes, the other will loose quorum. Am I
missing something?

Any insight appreciated.
- --
Katriel Traum, PenguinIT
RHCE, CLP
Mobile: 054-6789953
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