> Åke Sandgren wrote:
> >
> > The site should decide what OS they want to run and the VO should be
> > made to adapt to this. The site may for instance have security rules in
> > place that says they can't run just any OS that the VO wants (or anyone
> > of the EGEE/LCG/EDG supported ones) or they might even be running a
> > "non-supported" hardware like RS6K machines with AIX...
...
I don't really understand this: the LCG middleware hasn't been ported much
beyond Fedora has it - certainly not (e.g.) AIX?
Whatever the WNs use, I would expect that the service nodes at a site
would be running something pretty close to an EGEE/LCG/EDG supported OS.
For a number of reasons including its external visibility, I'd class the
VO-box as a service node, rather than a WN.
On Wed, 12 Oct 2005, Jeff Templon wrote:
...
> The SITE determines the OS unless special arrangements are made with the site.
> These special arrangements are indeed *special* meaning the default OS for the
> WNs at the site is what you should expect to be getting.
This seems wrong: surely the VO should expect the default OS for the
*service nodes* (CE,SE, etc.) at the site. ([Un]helpfully, this shouldn't
be published by sites for security reasons...)
If a site has its workers on a private LAN, then it might reasonably have
say RH7.3 on the WNs but SLC on the (outward facing) service nodes (some
sites HAVE done exactly this, IIRC).
In that situation though, the odds of being allowed to deploy a VO-box on
RH7.3 (or of VOs wanting to, of course!) seem pretty slim!
i.e. I would expect that the default VO-box OS at a site would be the one
already accepted there for use by externally visible machines, e.g. CE, SE
etc.
I think this still satisfies the criterion of
> "let's try and get the maximum extra benefit for the VOs and at the same
> time create as little extra work for the sites as possible."
While thinking about private LANs, it strikes me that one question might
be whether or not a VO service could run on a multi-homed machine, rather
than all WN to VO-box traffic having to go through some gateway.
Thanks
Henry
--
Dr. Henry Nebrensky [log in to unmask]
http://people.brunel.ac.uk/~eesrjjn
"The opossum is a very sophisticated animal.
It doesn't even get up until 5 or 6 p.m."
|