Title: Upgrading OSCAR Cluster
Hi John:
There is currently no upgrade
path for OSCAR - i.e. if you want to upgrade, you'll have to re-install the OS
(on the headnode), re-install OSCAR, re-create the images and re-deploy your
compute nodes.
You don't have to do this on
the production cluster, if you have 2 spare computers (hopefully with similar
hardware as your cluster nodes), you can build a test cluster and create/tweak
your images before you perform this on your production cluster. You
probably also want to backup your user files, fstab as well as other
configuration settings from Ganglia and/or TORQUE, etc.
CentOS 3 is based on RHEL3
and should be quite similar to Red Hat Linux 9 - if you want a "newer"
distribution I would recommend at least CentOS 4 (that is provided that your
other software work under this OS). Do note that CentOS 4 runs 2.6 kernel,
whereas both CentOS 3 and RHL9 runs 2.4 kernel.
Cheers,
Bernard
From: [EMAIL PROTECTED] on
behalf of OSCAR
Sent: Wed 08/02/2006 12:04
To:
[email protected]
Subject: [Oscar-users] Upgrading
OSCAR Cluster
We're running OSCAR 3.0 on RedHat9. We're
running into several issues with some of our software and the solution seems to
be upgrading to a newer linux distribution. This cluster is shared by
multiple projects so I want to minimize the impact as much as possible.
What I'd like to do is upgrade OSCAR, use it to build an image based on a newer
distribution, tweak the image with all the changes we've made for our software,
and then deploy it.
I'm just starting to look at this, so if anyone has
suggestions, please let me know. Can anybody point me to upgrade
instructions? Is it as simple as just installing the latest oscar version
and proceeding like a new install? Will the installation notice that I
already have a cluster deployed and pick up those settings?
Any advice on whether to upgrade the headnode
OS? Should I do this first?
I plan to use CentOS 3, primarily for compatibility
with other systems we use.
All advice is greatly appreciated…I'll start digging
around for this information myself now too. :)
Thanks,
John Artman
CCNA, MCP, RHCE/CT
Senior Systems Engineer
ENSCO Inc.
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