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Subject: Re: [OMPI users] cluster LiveCD
From: Tim Mattox (timattox_at_[hidden])
Date: 2008-08-07 15:03:24

I think a better approach than using NFS-root or LiveCDs is to use Perceus in
this situation, since it has been developed over many years to handle this
sort of thing (diskless/stateless beowulf clusters):
It leverages PXE booting so all you need to do on a per-node basis is enable
PXE booting in the BIOS. The primary limitation I see would be if your
windows machines are set up to use DHCP to get their IP addresses from
some server that is outside your control, since Perceus would need to take
over DHCP services to do its magic.

On Wed, Aug 6, 2008 at 6:05 PM, Adam C Powell IV <hazelsct_at_[hidden]> wrote:
> On Tue, 2008-08-05 at 17:01 -0500, Ben Payne wrote:
>> Hello. I am not sure if this is the correct list to ask this
>> question, so if you know of a more appropriate one please let me know.
>> I think am looking for a LiveCD that supports MPI, specifically one
>> that has mpif90 built in, and can easily mount external (USB) drives
>> for storing data.
>> I have access to 40 Windows computers in a lab that rarely gets used.
>> I would like to use the computers to run a cluster during the
>> weekends, but be able to not mess with the Windows installation that
>> exists on the hard drive. Because of this, I think a LiveCD would be
>> good, and one that supports PXE booting is even better. If there is a
>> better way to do this (run MPI, not disrupt Windows) please let me
>> know.
> The easiest way to do what you want is probably to netboot from a server
> on the subnet with NFS-root. That way you don't need to make a bunch of
> new CDs to upgrade a single piece of software. Just upgrade/modify the
> environment on the server, and everybody else upgrades instantly.
> Turn on the server and reboot the machines, and you're in Linux with
> MPI. Disable PXE at the server and reboot and you're back in Windows.
> LTSP has some tools to do this, as does the Debian package lessdisks.
> The basic principle is in and
> . The
> old diskless package did this beautifully, but bitrotted and is
> deprecated due to lack of maintenance.
> -Adam
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Tim Mattox, Ph.D. -
 tmattox_at_[hidden] || timattox_at_[hidden]
 I'm a bright...