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

"Kovacs, Corey J." <cjk@xxxxxxxxxx> · Thu, 31 Aug 2006 05:50:35 -0400

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@xxxxxxxxxx 
[mailto:linux-cluster-bounces@xxxxxxxxxx] On Behalf Of Peter 
Gustafsson1
Sent: Thursday, August 31, 2006 3:40 AM
To: 
linux clustering
Subject: Re:  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@xxxxxxxxxx 

Red Hat Enterprise Linux 
Certified Engineer 

    Mikhail A Zelikov 
      <mzelikov@xxxxxxxxxx> 
Sent by: linux-cluster-bounces@xxxxxxxxxx 
      2006-08-24 16:36 

            Please respond 
            to
linux clustering

            To
          linux-cluster@xxxxxxxxxx 

            cc

            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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