Mailinglist Archive: opensuse (2224 mails)

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[opensuse] Another Xen question
  • From: Matthew Stringer <qube@xxxxxxxxxxxxxx>
  • Date: Fri, 2 Feb 2007 17:11:28 +0000
  • Message-id: <200702021711.29527.qube@xxxxxxxxxxxxxx>
I have 58 stand alone machines running Redhat 7.3

They run shared Apache, Exim, MySQL (nothing special).

they're all white boxes with dual P3 or P4 CPU's and local IDE disks in them.

They form a legacy platform that means they can't really be upgraded or the
contents migrated off any time soon.

The problem I'm facing is that if a server fails I can't install 7.3 onto an
new machine.

Currently use a Suse boot CD, boot into rescue mode, format drives and install
GRUB, then copy a 7.3 image onto drive and boot it that way (needs a little
tweaking to get it to work).

This worked for a while but I'm really struggling to get it to work now.

I'm thinking of buying new machines, running SUSE with Xen. Then run RH 7.3 as
VM's and have a SAN with external storage.

Conceptually I can't see why it wouldn't work fine but I can't find any data
to suggest how many VM's I can get on a server.

For example if I have 10 dual P3 1GHz servers will they all run fine on 1 new
server with a dual quad-core Xeon CPU?

Hardware vendors I've asked don't seem to know for sure and I don't want to
fork out for extra servers if they're not needed.

Any ideas, is there a rule of thumb for working this out?

Cheers

Matthew
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