GFS

[Karchner, Craig (IT Solutions US)]

If you are going to access the same data file two or more servers you
must use some type of cluster filesystem. You do not need to run the
full cluster suite to use gfs. I use GFS to share files between two
servers. I do not have the cluster suite installed, that is for
application failover not file sharing.


Craig

-----Original Message-----
From: redhat-list-bounces at redhat.com
[mailto:redhat-list-bounces at redhat.com] On Behalf Of Kristoffer Knigga
Sent: Wednesday, October 29, 2008 9:24 AM
To: General Red Hat Linux discussion list
Subject: RE: GFS

I just took RH436 last week, so here is what I understand from that:

You must have a basic cluster set up to use GFS.  The reason being that
everything using a shared file system like this must be able to
communicate in order to negotiate locking.  If there was no such
communication, you'd have the possibility of node1 and node2 trying to
write the same block at the same time, and thus causing inconsistent
data.  Red Hat Cluster Suite manages this communication to ensure
everything is copasetic.

Shared storage + GFS is not a replacement for NFS.

Kris



-----Original Message-----
From: redhat-list-bounces at redhat.com
[mailto:redhat-list-bounces at redhat.com] On Behalf Of Ryan Golhar
Sent: Tuesday, October 07, 2008 3:50 PM
To: General Red Hat Linux discussion list
Subject: GFS

Has anyone successfully setup GFS?  I have SAN connected to several
computers by fibre, and it appears that GFS is the way to go as opposed
to use an NFS server.

Do I really need to set up all the other aspects of a Redhat cluster to
get GFS to work?  There doesn't seem to be a good HOW-TO of this
anywhere, and the RedHat docs are not as helpful as I would have liked.



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