Still Redhat yep, but in this case it was actually a downgrade to AS 3.2
from AS 3.5 as that's what I had available for testing, as well as 32 vs
64 bit. I had to wipe that system for other purposes already, so
unfortunately I can't check the specific kernel et al versions we were
running on.
Mike Pflugfelder wrote:
So the OS between the two servers is still RedHat, just the difference
between 32 bit and 64 bit, correct? Are they the same release, same
glibc, same kernel?
It doesn't surprise me that it would work as Universe on RedHat is 32
bit, not 64, but I wanted to get more details if possible.
Thanks!
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Peter Ivanick
Sent: Wednesday, January 25, 2006 1:14 PM
To: [email protected]
Subject: Re: [U2] Hypothetical question about switching server frontends
to SAN w/o reinstalling Universe
*Extremely* preliminary testing indicates no problems moving from a
X86_64 based SunV20z to an x86 based IBM x345, and from the RH 64 bit OS
to the 32 bit OS, works fine. I'm not going to be able to do any testing
further in depth because we need to reallocate the qlogic cards,
unfortunately, but at least in a trivial way it worked absolutely fine.
System came up and all the custom software I tested worked exactly as
expected.
Many thanks, Mike & all, this is heartening.
Mike Pflugfelder wrote:
If you do, I'd love to hear how it works out for you, either on list
or
off.
-Mike
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Peter Ivanick
Sent: Wednesday, January 25, 2006 8:36 AM
To: [email protected]
Subject: Re: [U2] Hypothetical question about switching server
frontends
to SAN w/o reinstalling Universe
Thanks very much, Mike, I'll probably give that a shot myself just to
see what happens.
Mike Pflugfelder wrote:
The licensing and the files / pointers that you mentioned earlier
were
the only issues that we encountered. Once all of that was taken care
of, it's very simple to just move the 'application' from one server
to
another. If I ever do get a chance to try it on dis-similar
hardware,
I'll post a note.
-Mike
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Peter
Ivanick
Sent: Tuesday, January 24, 2006 7:24 AM
To: [email protected]
Subject: Re: [U2] Hypothetical question about switching server
frontends
to SAN w/o reinstalling Universe
Many thanks, Mike, good to know it's in use elsewhere. Anything I'm
missing in terms of the switching out frontends/enabling a new
system,
or any gotchas I need to worry about apart from the licensing issues
you
bring up?
Mike Pflugfelder wrote:
Peter,
I've had experience with the same setup. We have used SANs for
High Availability environments as well as Disaster Recovery as well.
We
have used this in quite a few environments that want to be up all of
the
time. We haven't ever tried to use different OS releases as the
purpose
was to keep the system highly available or be back online as quickly
as
possible. One of the advantages of a scenario like this is that you
don't need to purchase additional licenses for other servers. If
your
application goes down for any reason, you fail the disks over to
another
server and bring up the application from there. In other scenarios,
you
either purchase hot-standby licenses at a percentage of the full
price,
or purchase a small user license, then replace it with the full
license
if you have a disaster situation.
Just my $0.02
Michael Pflugfelder | Systems Integrator | Keystone Information
Systems
| 856-722-0700 | [EMAIL PROTECTED]
--
Peter Ivanick
Web Services and Instructional Technologies
School of Veterinary Medicine, University of Pennsylvania
Email: [EMAIL PROTECTED]
Phone: 215.573.2306 Fax: 215.573.8777
http://www.vet.upenn.edu/
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