[Beowulf] Forwarded from a long time reader having trouble posting

Gerald Creager gerry.creager at tamu.edu
Tue Dec 1 16:04:32 EST 2009


A combination of mostly kernel improvements, and some useful middleware 
as RedHat and by extension, CentOS, seek to get farther into the cluster 
space.
gerry

Toon Knapen wrote:
> Any idea why it gives better performance? Was it on memory bw intensive 
> apps? Could it be due to changes in the kernel that take into account 
> the Numa architecture (affinity) or ...
> 
> On Tue, Dec 1, 2009 at 8:57 PM, Tom Elken <tom.elken at qlogic.com 
> <mailto:tom.elken at qlogic.com>> wrote:
> 
>      > On Behalf Of Gerald Creager
>      > I've been quite happy with CentOS 5.3 and we're experimenting with
>      > CentOS 5.4 now.  I see good stability in 5.[34]
> 
>     I have to second the recommendation of 5.3 or 5.4.
> 
>     Some time ago, we saw significant performance improvements on
>     Nehalem (Xeon X5570) in moving from RHEL 5.2 to 5.3.  So I expect
>     that moving from 5.1 to 5.[34] would also be a significant
>     improvement in performance.
> 
>     Cheers,
>     -Tom
> 
>      > and the incorporation
>      > of
>      > a couple of tools worth having in a distribution for 'Wulf use.  I'd
>      > not
>      > recommend sticking with the old version, but of course, once you're
>      > established, not carelessly upgrading, either.
>      >
>      > gerry
>      >
>      > Joe Landman wrote:
>      > > My apologies if this is bad form, I know Toon from his past
>      > > participation on this list, and he asked me to forward.
>      > >
>      > > -------- Original Message --------
>      > >
>      > > Dear all,
>      > >
>      > > I've been working on hpux-itanium for the last 2 years (and even
>      > > unsubscribed to beowulf-ml during most of that time, my bad)
>     but soon
>      > > will turn back to a beowulf cluster (HP DL380G6's with Xeon X5570,
>      > > amcc/3ware 9690SA-8i with 4 x 600GB Cheetah 15krpm). Now I have
>     a few
>      > > questions on the config.
>      > >
>      > > 1) our company is standardised on RHEL 5.1. Would sticking with
>     rhel
>      > 5.1
>      > > instead of going to the latest make a difference.
>      > > 2) What are the advantages of the hpc version of rhel. I
>     browsed the
>      > doc
>      > > but unless having to compile mpi myself I do not see a
>     difference or
>      > did
>      > > I miss soth.
>      > > 3) which filesystem is advisable knowing that we're calculating on
>      > large
>      > > berkeley db databases
>      > >
>      > > thanks in advance,
>      > >
>      > > toon
>      > >
>      > > Toon Knapen toon.knapen at gmail.com <mailto:toon.knapen at gmail.com>
>      > >
>      > > -----------------------------------
>      > >
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