RE: [Linux-cluster] Shared Storage and Quorum device

[Kovacs, Corey J.]

True, you don't "have to" but as of RHEL4, update 4, you have the option. I
believe the only
available documentation is "man qdisk" once it's installed, unless redhat has
updated the
online docs. I believe the docs you might be looking at are for RHEL 3 and
the older cluster
services software.
 
 
Cheers
 
 
Corey

________________________________

From: linux-cluster-bounces at redhat.com
[mailto:linux-cluster-bounces at redhat.com] On Behalf Of Peter Gustafsson1
Sent: Thursday, August 31, 2006 3:40 AM
To: linux clustering
Subject: Re: [Linux-cluster] Shared Storage and Quorum device



Hi, 

In Red Hat Cluster  Suite 4 you don't need to have shared storage.

Hälsningar/Regards Peter
_____________________________________________________________________________
______ 
Peter Gustafsson

UNIX/LINUX systems programmer

SDO/SSO/Server Management/Operating Systems/Unix

. * Nordic Processor, Oddegatan 5, SE-164 92 Stockholm
% * Phone:+46 (0)8 793 39 23 Mobile:+46 (0)70 793 39 23
) * mailto:peter.gustafsson1 at se.ibm.com 
Red Hat Enterprise Linux Certified Engineer 



Mikhail A Zelikov <mzelikov at cs.uml.edu> 
Sent by: linux-cluster-bounces at redhat.com 

2006-08-24 16:36 
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Subject
[Linux-cluster] Shared Storage and Quorum device

	




I was wondering if anybody has information on this. I have 2 node cluster
and some shared storage between two nodes.
The manual contains some information on the shared storage setup:
http://www.redhat.com/docs/manuals/csgfs/browse/rh-cs-en/s1-hardware-cluster.
html#S2-HARDWARE-STORAGESETUP
Section 2.5.3.1 at
http://www.redhat.com/docs/manuals/csgfs/browse/rh-cs-en/s1-hardware-connect.
html.
However I could not find a way to tell the cluster to use my raw devices
and also test that any of these devices are being used. I also use my
cluster w/o any shared devices and it seems to work.
But in this case a 2-node cluster requires a quorum devices (usually
shared storage) - I can see that when one node is down I still have a
quorum w/o using any shared storage.

So my questions are:
1. Do I have to have a shared storage?
1.a If yes then how do I configure and test it?
1.b If no then how is the quorum is achieved in 2-node cluster when 1 node
is down?

Thanks,
Mike

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