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RE: [Linux-cluster] GFS Based File Server Advice

If I recall correctly, all nodes in your GFS cluster need to be on the
same kernel rev, so mixing and matching FC4/5 might work, but I don't
think this configuration is supported from Redhat or even something you
might want to do later down the line.

What exactly are you accomplishing by spreading the storage across
multiple systems and using them in a GFS shared file system? It really
doesn't sound like you need GFS here? Are you just trying to keep a copy
of each code repository on each system and provide r/w access from each
node? Unless you're using some kind of distributed source code revision
system that will handle you're locking and consistency checking I
wouldn't advise going down this route you are really just increasing
your chances of file/data corruption. 

If bandwidth isn't a concern I would go with either NFS, or dedicated
iscsi LUNS to each host not under a shared fs. 

-----Original Message-----
From: linux-cluster-bounces redhat com
[mailto:linux-cluster-bounces redhat com] On Behalf Of HAWKER, Dan
Sent: Wednesday, August 30, 2006 7:39 AM
To: (linux-cluster redhat com)
Subject: [Linux-cluster] GFS Based File Server Advice

Hi All,

I have a new iSCSI array arriving soon and would like to carve it up and
GFS to provide a central storage pool for a group of servers we use for
building/compiling software.

Each team of developers only has access to their own specific build
and as such I don't need the servers to *act as one* however as they all
a common data snapshot, a cluster FS would seem a sensible direction to

My developers are coding an unholy mix of Java, C & C++ in the main, and
although they access the data snapshot simultaneously (presently spread
across a couple of servers and dragged around using NFS) they rarely, if
ever are reading/writing the exact same part of the data store at the
time. They use a view of the snapshot (in essence a duplicate),
edit/write/etc the code, build and then submit it back to our versioning
software (Rational ClearCase) which is stored elsewhere. 

After reading through the docs and other resources, it seems GFS would
be a
good fit, what with us running a mix of FC4/5 and RHEL4 boxes.

Having read through the docs and stuff it all looks pretty
however thought I'd ask some advice to check for any gotchas and general
*that didn't quite work as anticipated* experiences from ppl that I
use GFS on a daily basis, and hopefully anecdotes from ppl who use GFS
in a
software development role.



Dan Hawker
Linux System Administrator
EADS Astrium


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