On Monday 12 June 2006 15:39, Greg Lindahl wrote:
FWIW there is a de-facto ABI with MPICH when using shared libraries,
we have used this trick to run all sorts of ISV codes with our
interconnect.
My guess is that it is the ISV's that MS are going to target:
Why bother building and supporting
On Monday 12 June 2006 14:59, Gerry Creager N5JXS wrote:
If I recall correctly, the Data General ad in response included the
comment, The bastards say, 'Welcome'.
Apparently DG produced but never actually ran that advert.
On Monday 12 June 2006 14:02, Joe Landman wrote:
If HPC has been both too expensive AND too difficult to use, then why is
it as a market growing at 20+% per year?
Ahh, don't let facts confuse you!
My guess is that the targets of their comment are MS's customers who have
never touched a
On Sunday 10 September 2006 11:48 am, Jim Lux wrote:
To me, the license reads pretty clear... you can fool with it at home
to learn about the product, and tinker to your heart's content, but
don't do it as a job or for product development.
/lurk
I suspect they also have a strong interest in
On Saturday 16 September 2006 12:32 am, Brent Franks wrote:
Nice, any sort of comparison data in terms of differences in
throughput achieved?
We weren't as concerned about throughput as the fact that when the NFS server
was under mild load (which the previous RH7.3 box could cope with) it
On Saturday 16 September 2006 12:49 am, Mark Hahn wrote:
upgrading the rhel server to a kernel.org kernel would be minimal work,
probably...
That certainly wasn't the case with RHEL3 where the 2.4 kernel had NPTL
backported from 2.6 and their userspace was built around that.. :-(
--
On Sunday 17 September 2006 2:55 am, Mark Hahn wrote:
so you couldn't have slapped a modern 2.6 kernel on it? I've certainly
put much newer kernels on old distros (though not any of the commercial RH
variants so far.)
This was back in mid-late 2004 and (from memory) the versions of kernel
On Wednesday 27 September 2006 5:54 am, Mike Davis wrote:
We've had good luck with Apple's arrays.
/lurk
So have we.
On the other hand we've had an IBM FAStT EXP enclosure (or whatever they're
called today) which lost 2 SCSI drives (one in the main unit and one in the
EXP) within a
On Wednesday 27 September 2006 6:10 am, Erik Paulson wrote:
We don't do any SAN, each one is attached to a 1U server and we have our own
filesystem to track where stuff is. Works for us.
Snap - IBM e325's running FC4.
--
Christopher Samuel - (03)9925 4751 - VPAC Deputy Systems Manager
On Thursday 28 September 2006 2:08 pm, Robert G. Brown wrote:
I don't think mkdir(2) does the equivalent of mkdir -p and create parent
directories as required.
That's quite correct, you'll always have to do those yourself it they don't
already exist (otherwise you'll get EACCESS).
--
On Wednesday 27 September 2006 5:10 am, Angel Dimitrov wrote:
Is there many clients for processor time? As I saw the biggest
supercomputers in the World are very busy! I'm wondering if it's
worthwhile to setup a commercial cluster. Intel are planning for new
processors - two CPUs each with
On Thursday 28 September 2006 2:41 pm, Mark Hahn wrote:
also, man 3 strerror ;)
and to make life even easier - man 3 perror :-)
--
Christopher Samuel - (03)9925 4751 - VPAC Deputy Systems Manager
Victorian Partnership for Advanced Computing http://www.vpac.org/
Bldg 91, 110 Victoria
On Saturday 30 September 2006 3:37 am, Vincent Diepeveen wrote:
No average joe knows the word 'linux'.
For them an astronaut course is easier than learning linux.
That is demonstrably false:
http://vic.computerbank.org.au/
Computerbank Victoria founded the Australian Computerbank
On Thursday 19 October 2006 05:10, Tim Moore wrote:
but do not quite understand how to login as root (without a password)
throughout the compute nodes via ssh because /root is present on each
system.
Others have covered all the keying, but one thing that often catches a lot of
people out
On Tuesday 31 October 2006 10:54, Craig Tierney wrote:
Sorry to ask this question here, but is anyone familiar with
discussion lists around IBM power systems(p5 575), and in particular
their cluster solution? I have been trying for several days
to find the right mailing-list or newsgroup
On Wednesday 01 November 2006 02:01, Craig Tierney wrote:
Thanks for the pointers. My customer recently purchased a pSeries p5
575 cluster (8 node, 8 dual-core sockets) with GPFS, HPS, and AIX.
Ahh, AIX. 'nuff said..
Our system is OpenPOWER 720 so AIX is nobbled not to run on it (which
Hi folks,
I'm off to my first SC'06 this year to help man the VPAC booth with a couple
of friends and was wondering if there were any details about the Beowulf bash
yet ?
cheers,
Chris
--
Christopher Samuel - (03)9925 4751 - VPAC Deputy Systems Manager
Victorian Partnership for Advanced
On Thursday 02 November 2006 10:19, Donald Becker wrote:
I'm now trying to convince people that it's better for the meeting to
be the bash itself, and the topic to be Beer: is more always better?
I'm pretty certain that we can find speakers for that.
It depends on the beer. 'nuff said.. :-)
On Thursday 02 November 2006 7:03 pm, Leif Nixon wrote:
Chris Samuel [EMAIL PROTECTED] writes:
It depends on the beer. 'nuff said.. :-)
Brains S.A., er, Chris..
I had a real problem with that at CCGrid in Cardiff. How are
you supposed to order a pint of Brains with a straight face?
I
On Tuesday 07 November 2006 02:18, Vincent Diepeveen wrote:
So until end 2007 the core2 annihilates any opteron system.
In my experience with both architectures it depends on what you want out of a
box, and what you're running on it, as well as your power constraints..
There is a good reason
On Wednesday 08 November 2006 14:43, Mark Hahn wrote:
I agree with Pathscale on this. we evaluated Pathscale about 2 years ago,
and were rather apalled at the license-hold time (which was substantially
longer at the time.)
Aha, that was around the time that we looked at it last.
--
On Friday 10 November 2006 03:37, Michael Will wrote:
Completely usel.ess unless you plan to litigate and have to prove
authorship
Certainly for me being able to demonstrate authorship and/or modification of a
message or file is useful in its own right, I don't understand why utility
should
On Friday 10 November 2006 05:12, Robert G. Brown wrote:
besides, signatures don't have to be attachments
That's the old style ASCII armour technique, effectively supersceded in 1996
by RFC 2015 (based on the previous PGP/MIME work).
--
Christopher Samuel - (03)9925 4751 - VPAC Deputy
On Wednesday 04 October 2006 00:37, Douglas Eadline wrote:
This is a non-obvious result many find hard to believe.
That is, MPI on the same node maybe faster than some shared/threaded
mode. (of course it all depends on the application etc.)
We believe we have seen that with LS-Dyna comparing
On Friday 24 November 2006 18:16, 陈齐旺 wrote:
I just install Rocks v4.2.1 on our IA64 Cluster, I encounterred this
problem, when I used torque 2.1.2, It still get 128k for ulimit -l, and I
can't modify the limit. So I can't use OpenMPI and Intel MPI to run MPI
program.
Probably worth asking
On Thursday 30 November 2006 18:19, reza bakhshi wrote:
How can i find some more detailed technical information on Beowulf
software infrastructure?
Hopefully these will help..
http://www.phy.duke.edu/~rgb/Beowulf/beowulf_book/beowulf_book/
http://en.wikipedia.org/wiki/Beowulf_(computing)
On Wednesday 13 December 2006 15:15, Anand Vaidya wrote:
Have you considered G-FARM? http://datafarm.apgrid.org
Any news on when they're going to do a release as a POSIX filesystem yet ?
Last time I'd heard that was planned for 2.0, but I've not heard anything
about that release..
--
On Thursday 21 December 2006 03:45, Mr. Sumit Saxena wrote:
I have provided the link of the libraries of LAM in my ld.so.conf as
well as .bash_profile
Try putting the PATH configuration for LAM into your .bashrc instead..
good luck!
Chris
--
Christopher Samuel - (03)9925 4751 - VPAC Deputy
On Wednesday 27 December 2006 05:29, Chetoo Valux wrote:
I wonder then if there would be potential buyers for cluster time. I've
been browsing, not too deep, the net, and I've not found (yet) any
information of someone selling cluster time.
We occasionally get approached by commercial
On Thursday 28 December 2006 08:15, Yaroslav Halchenko wrote:
That is pity that Areca's drivers got kicked even from -mm devel branch
of linux mainstream kernel (unfortunately I don't remember in
which exact version it has happened).
The ARECA drivers have just moved from the mm tree into the
On Thursday 28 December 2006 14:10, Yaroslav Halchenko wrote:
on the server I am still running 2.6.18.2 and also I am not using ext3 (just
reiser and xfs), and I am not sure when I will have a chance to reboot (that
beast is main file server for our cluster at the moment).
Understood, we tend
On Thursday 28 December 2006 15:24, Joe Landman wrote:
If you have the financial wherewithal to support them, I urge you to do
so.
They do have a starving hacker rate that's about US$40 a year (it's an
honour system that you choose the appropriate amount, there's a project
leader option for
On Thursday 28 December 2006 07:36, Jeff Johnson wrote:
It is a reasonable assumption that Sun did their homework. I wonder who
they are targeting.
http://www.channelregister.co.uk/2005/10/25/sun_grid_slip/
Sun's grid: lights on, no customers (October 2005)
14 months of utility computing
On Thursday 28 December 2006 18:22, Ruhollah Moussavi Baygi wrote:
Please let me know your idea about SW level1 (Giga). Is it a proper choice
for a small Beowulf cluster?
Never heard of it. Care to enlighten us ?
--
Christopher Samuel - (03)9925 4751 - VPAC Deputy Systems Manager
On Friday 29 December 2006 04:24, Robert G. Brown wrote:
I'd be interested in comments to the contrary, but I suspect that Gentoo
is pretty close to the worst possible choice for a cluster base. Maybe
slackware is worse, I don't know.
But think of the speed you could emerge applications with
person hog 64 CPUs for one job ?
On Fri, Dec 29, 2006 at 09:39:59AM +1100, Chris Samuel wrote:
On Friday 29 December 2006 04:24, Robert G. Brown wrote:
I personally would suggest that you go with one of the mainstream,
reasonably well supported, package based distributions. Centos, FC
On Friday 29 December 2006 21:05, Geoff Jacobs wrote:
Here's a bare bones kickstart method (not Kickstart[tm] per se):
http://linuxmafia.com/faq/Debian/kickstart.html
Good old Rick, he crops up everywhere is a mine of information. ;-)
Regarding kickstart, among choices for pre-scripted
On Wednesday 03 January 2007 08:06, Chris Dagdigian wrote:
Both should be fine although if you are considering *PBS you should
look at both Torque (a fork of OpenPBS I think)
That's correct, it (and ANU-PBS, another fork) seem to be the defacto queuing
systems in the state and national HPC
On Wednesday 03 January 2007 15:55, Nathan Moore wrote:
WARNING: server not specified (set $pbsserver)
This has already been answered on the Torque list, but for the folks on the
Beowulf list this was the issue.
cheers!
Chris
--
Christopher Samuel - (03)9925 4751 - VPAC Deputy
On Thursday 04 January 2007 04:27, David Mathog wrote:
Joe and I aparently exist in parallel software universes ;-).
Being MPI means it can take advantage of high speed interconnects (e.g.
building it with MPICH-GM to use native Myrinet). Of course whether that
would benefit HMMER is
On Thursday 04 January 2007 22:16, Reuti wrote:
Linda and PVM* need some kind of rsh/ssh between the nodes, and I
didn't get a clue up to now to convince Linda to use the PBS TM of
Torque.
Torque provides a pbsdsh command that uses the TM interface and acts like the
various DSH variants.
This is about a storage node for a cluster, so it's partly on topic.. :-)
Through happy coincidence we now have a box with two FC cards going to a SAN
switch and thence into each side of an IBM FAStT 600 (doing H/W RAID5). The
FAStT is partitioned into two 1.6TB lumps and each FC card can see
On Tuesday 09 January 2007 23:35, Leif Nixon wrote:
I suspect this is deprecated these days, but I have handled situations
like this by using the *MD* multipath support instead. Then you can
explicitly define your multipath devices and stripe them together, all
in /etc/mdadm.conf.
I don't
On Thursday 11 January 2007 01:21, Andrew Piskorski wrote:
It sounds suspiciously like decision making driven by what the rules and
paperwork says you're supposed to do
I knew an organisation (not this one) that had the rule that every system had
to run a full virus scan once a day.
The
Hi folks,
Anyone here played with OneSis ? It looks like a variation on the WareWulf
theme..
http://www.onesis.org/
A thin, role-based, single image system for scalable cluster management.
oneSIS is a simple, flexible method for managing one or more clusters from a
single filesystem image.
On Tue, 13 Feb 2007, Mitchell Wisidagamage wrote:
I think this news is of some relevance to the group...
http://news.bbc.co.uk/1/hi/technology/6354225.stm
Single or double precision ?
--
Christopher Samuel - (03)9925 4751 - VPAC Deputy Systems Manager
Victorian Partnership for Advanced
On Sat, 17 Feb 2007, Jim Lux wrote:
I think it's pretty obvious that Google has figured out how to
partition their workload in a can use any number of processors sort
of way, in which case, they probably should be buying the cheap
drives and just letting them fail (and stay failed.. it's
Hi folks,
We've got an IBM Power5 cluster running SLES9 and using the GM drivers.
We occasionally get users who manage to use up all the DMA memory that is
addressable by the Myrinet card through the Power5 hypervisor.
Through various firmware and driver tweaks (thanks to both IBM and Myrinet)
On Thu, 22 Feb 2007, Chris Samuel wrote:
Through various firmware and driver tweaks (thanks to both IBM and Myrinet)
we've gotten that limit up to almost 1GB and then we use an undocumented
environment variable (GMPI_MAX_LOCKED_MBYTE) to say only use 248MB of that
per process (as we've got 4
On Thu, 22 Feb 2007, Patrick Geoffray wrote:
Hi Chris,
G'day Patrick!
Chris Samuel wrote:
We occasionally get users who manage to use up all the DMA memory that is
addressable by the Myrinet card through the Power5 hypervisor.
The IOMMU limit set by the hypervisor varies depending
On Thu, 22 Feb 2007, Craig Tierney wrote:
I didn't think it was that cheap. I would prefer Layer 3 if
this was going into a rack of a multi-rack system, but the
price is right.
Thanks Craig!
--
Christopher Samuel - (03)9925 4751 - VPAC Deputy Systems Manager
Victorian Partnership for
On Thu, 22 Feb 2007, Robin Harker wrote:
So if we now know, (and we have seen similarly spirious behaviour with
SATA Raid arrays), isn't the real solution to lose the node discs?
Depends on the code you're running, if it hammers local scratch then either
you have to have them or you have to
On Thu, 1 Mar 2007, Douglas Gilbert wrote:
That FAQ entry is about 2 years out of date. smartmontools
support for SATA disks behind a SCSI to ATA Translation (SAT)
layer is now much better. Please try the recently released
version 5.37 of smartmontools.
For instance, you should be able to
On Sat, 3 Mar 2007, David Mathog wrote:
So it would be nice if the range of underclocking / undervolting
adjustments provided on compute nodes extended quite a bit further
towards the lower end than it currently does.
FWIW 2.6.21 looks like it will include i386 support for the clockevents
On Fri, 2 Mar 2007, [EMAIL PROTECTED] wrote:
I have a small (16 dual xeon machines) cluster. [...]
Does anybody knows what is better for a cluster of this size, exporting the
filesystem via NFS
FWIW we run two NFS servers (dual 2.0GHz Opteron 240's) with users split
across the two and they
On Mon, 5 Mar 2007, John Hearns wrote:
Purely as a point of interest, since high energy physics labs use AFS
(and hence kerberos) they have already faced this one.
Interesting, though it's not clear from that whether it can cope with, say,
automatically renewing expiring tickets for running
On Wed, 7 Mar 2007, Juan Camilo Hernandez wrote:
I would like to know what server has the best performance for HPC systems
between The Dell Poweredge 1950 (Xeon) And 1435SC (Opteron)
If you are fortunate enough to have only a couple of applications you care
about, then get one of each on loan
On Fri, 9 Mar 2007, Kozin, I (Igor) wrote:
How many NFS daemons people are using on a dedicated
NFS server?
We use 128 and I've since found out that, coincidentally, that is the same
number which SGI use on their NAS head units (of which we have none).
YMMV. :-)
cheers!
Chris
--
Hi folks,
We have a potential user here who is interested in using DrQueue to manage
rendering jobs. Problem is that all our clusters are controlled exclusively
by PBS (Torque) and need to keep that because of the demand we have.
So I'm left wondering if anyone here has any knowledge about
On Wed, 14 Mar 2007, Peter St. John wrote:
and Ken wrote B in the late 60's (to extend your gleam in the eye
metaphor beyond bearability, I'd say that Dennis carred the project to
term). Nice thing about B is that the formal definition fits in 2 pages.
B, I remember it well and with fondness.
On Fri, 16 Mar 2007, Robert G. Brown wrote:
Or be human-readable. f2c code was just about as evil as any zomby
woof or eskimo boy could be.
The TenDRA compilers built at RSRE/DRA/DERA in the early/mid 90's that
implemented ANDF as a distribution format had large auto-generated chunks and
On Thu, 15 Mar 2007, Joe Landman wrote:
I seem to remember after my joyous year with Pascal in the early 80s that
they quickly caught the Modula fad (Niklaus Wirth could do no wrong),
dabbled a bit in other things, and came out strong in C++ around late 80s
early 90s.
Certainly at
On Thu, 15 Mar 2007, Greg Lindahl wrote:
Robert is in the South, all youse guys is a Northeast super-plural.
It also gets used around Melbourne (Australia)..
--
Christopher Samuel - (03)9925 4751 - VPAC Deputy Systems Manager
Victorian Partnership for Advanced Computing http://www.vpac.org/
On Wed, 21 Mar 2007, Tim Wilcox wrote:
The API, as far as I have read it, does not have nice routines for message
passing between the SPUs, you have to set up your own memory transfers or
address remote memory directly using the MFC.
FWIW the Charm++ folks are working on supporting Cell.
On Wed, 25 Apr 2007, Toon Knapen wrote:
Does anyone know of any projects underway that are trying to accomplish
exactly this ?
I believe the Moab scheduler supports provisioning of nodes on demand via
various means (xCat, System Imager) and this includes Xen when used with
Torque 2.1:
On Wed, 25 Apr 2007, Mark Hahn wrote:
hell no. only a few users even have a guess about how long their
job will run, let alone what it will actually do (in mem or IO usage).
Our users are roughly split into 3 groups, those who have a reasonable idea of
how long their job will run, those who
On Sat, 28 Apr 2007, Eugen Leitl wrote:
http://www.netlib.org/utk/people/JackDongarra/PAPERS/scop3.pdf
has some details on the GBit interface (yes, it's virtualized).
Thanks Eugen. I've just managed to find the presentation about the work being
done with Charm++ (and NAMD) on Cell.
On Sat, 5 May 2007, Peter St. John wrote:
I am configuring a cluster with ssh (but without passwords) and currently
the users can log in to compute nodes. I wish the clients to use the queue
system (Torque, it works fine) without being able to access the compute
nodes. In the past, we used
On Sun, 6 May 2007, Kilian CAVALOTTI wrote:
Not that ugly, actually. But what if users do a
ssh node -t bash --noprofile? ;)
Then if any of the 500 odd tried we would spot them with some other scripts
and chase them about it. We've not had to do that yet, though, fortunately!
To handle
On Sat, 12 May 2007, M C wrote:
After I install HPL on the machine, I try to run it in the bin dir of HPL
by mpirun -np 1 xhpl. But it reports cannot find mpirun command.
Looks like it can't find your MPI versions mpirun command.
Which MPICH did you use ?
--
Christopher Samuel - (03)9925
Hi folks,
Don't suppose anyone out there has any war stories about trying to get
Gaussian 03 going with CentOS5/RHEL5 ?
We're looking at running G03 here at VPAC and the new cluster will be running
CentOS5 and I'm trying to find out as much as possible before committing!
All the best,
Chris
On Sat, 14 Jul 2007, Lombard, David N wrote:
Amen, brother. Â Don's comments on PS efficiency are highly relevant,
and the kill-a-watt takes that all into account. Â There's also a spiffier
(and more expensive) model that logs the reading for later analysis.
I wish I could find an alternative
On Sat, 14 Jul 2007, Jim Lux wrote:
Hi Jim,
The Kill-A-Watt is available in a 220V 50Hz version.
I didn't realise that, thanks!
Might have to cobble a plug/receptacle that works depending on your local
style.. the 220V ones I've seen have the round plugs and I think you have
the slanted
On Tue, 17 Jul 2007, Robert G. Brown wrote:
The real drivers will install into the BIOS and should stop being OS
specific at all
Given the general quality of BIOS and ACPI implementations this somehow does
not fill me with a warm glow...
Our BIOS supports both types of Linux, RHEL and
On Wed, 18 Jul 2007, Jaime Perea wrote:
Something related, it can't be serious: Any comment from
the experts? :-)
I love the irony of:
In 2006, Microsoft announced the release of Windows Compute Cluster Server
(CCS) 2003
My first thought was oh, only 3 years late then..
(and yes, I do know
On Wed, 18 Jul 2007, Robert G. Brown wrote:
No, you misunderstand.
No, I just have a different point of view. :-)
At this point in time, one major job of an operating system is to hide the
details of the hardware from the programmer.
Correct - you should not need to know whether the path to
On Wed, 18 Jul 2007, Robert G. Brown wrote:
I don't believe that Vista's slowness has anything to do with hardware
memory footprint.
Probably this, from page 14 of Output Content Protection and Windows Vista
at http://www.microsoft.com/whdc/device/stream/output_protect.mspx :
In addition to
On Thu, 19 Jul 2007, Tim Cutts wrote:
And this is different from Linux how?
Because you are comparing two different system calls.
fsync(2) under Linux says:
fsync() transfers (flushes) all modified in-core data of (i.e., modi‐
fied buffer cache pages for) the file referred to
On Thu, 26 Jul 2007, Julien Leduc wrote:
This last technique ensure reproductible experiments, more performances,
drawbacks are: more work on the middleware that make all that magic come
true.
http://workspace.globus.org/vm/index.html
The general idea being that you can request the config
On Wed, 8 Aug 2007, A Lenzo wrote:
I am installing OpenMosix right now, and found that the kernel for
2.6 is in beta. But this beta was released in late 2006 and I
don't see anything newer.
http://sourceforge.net/forum/forum.php?forum_id=715406
# Moshe Bar, openMosix founder and project
===
CALL FOR PAPERS (VTDC 2007)
Workshop on Virtualization Technologies in Distributed Computing
held in conjunction with SC 07, the International Conference for
High Performance Computing, Networking and Storage.
On Tue, 21 Aug 2007, Glen Dosey wrote:
I've left out a lot of detail to keep this succinct. I can provide
it when necessary.
I think the details you've omitted mean there's not enough information
there to actually come to any conclusions! :-)
What distro on the clients and servers ?
What
On Sat, 1 Sep 2007, Jim Lux wrote:
The wikipedia didn't say if the P45 is pink, though.
Nope, they seem to be a blueish colour. I'm not up to digging through
my records for the one I got when I left the UK civil service before
migrating to Australia, so here's one someone else prepared
On Fri, 31 Aug 2007, Nestor Waldyd Alvarez Villa wrote:
mpirun: cannot start a.out on n1: No such file or directory
NFS (or other network/distributed fs) mountpoint not mounted ?
--
Christopher Samuel - (03) 9925 4751 - Systems Manager
The Victorian Partnership for Advanced Computing
P.O.
On Mon, 3 Sep 2007, Gerry Creager wrote:
Both should be required reading (and it's time to re-read The
Puzzle Palace) before asking open-ended questions about the
organization whose very name was once classified, and whose acronym
was expanded to, in most instances, No Such Agency.
Yesterday
On Thursday 13 September 2007 04:30:29 Mark Hahn wrote:
wow, that's a bit of a shock. I had heard mutterings about CFS using ZFS,
but would not have guessed a buyout.
This blog from Ricardo , the nice chap who has been working on the ZFS/FUSE
port to Linux (originally sponsored by the Google
On Friday 14 September 2007 06:19:34 Leif Nixon wrote:
I still think it would be interesting to see how often one gets data
corruption from other sources than disk errors (presuming ZFS is
perfect).
A good friend of mine has just had what appears to be a rather nasty (but
recoverable)
On Sunday 16 September 2007 04:48:56 Greg Lindahl wrote:
Several people have commented that fsprobe doesn't check existing files.
For your system binaries, you can test them using rpm -V.
One interesting problem I've experienced on a non-HPC server is a latent
memory error corrupting files
On Thu, 27 Sep 2007, Jeremy Fleming wrote:
Anyone know if there is any advantage to recompiling the default
RHEL 5 kernel to include the Opteron config option on a quad
processor opteron machine?
It may well be worth your while moving to the current kernel from the
RHEL one (2.6.22.9), we've
Hi fellow Beowulfers..
We're currently building an Opteron based IB cluster, and are seeing
some rather peculiar behaviour that has had us puzzled for a while.
If I take a CPU bound application, like NAMD, I can run an 8 CPU job
on a single node and it pegs the CPUs at 100% (this is built
On Mon, 8 Oct 2007, Chris Samuel wrote:
If I then run 2 x 4 CPU jobs of the *same* problem, they all run at
50% CPU.
With big thanks to Mark Hahn, this problem is solved. Infiniband is
exonerated, it was the MPI stack that was the problem!
Mark suggested that this sounded like a CPU
On Thu, 1 Nov 2007, andrew holway wrote:
I'm trying to find out about the effects of virtualisation on high
performance interconnects. Effects on latency and bandwidth.
Google is your friend.. :-)
There is an IBM presentation from the 2006 Xen conference on
virtualising InfiniBand networks,
On Thu, 23 Aug 2007, Lombard, David N wrote:
- You can directly manipulate the XML data from the multicast
channel.
We run a script on each node that uses the ipmitool command to pull
out CPU and system temperatures and then use gmetric to inject them
into Ganglia.
Very handy..
cheers,
On Mon, 22 Oct 2007, Chris Dagdigian wrote:
Does anyone have any experience/impressions of the Supermicro
Intelligent Management stuff?
We're using them on our new Opteron cluster that will start to blossom
into a Barcelona cluster soon.
The biggest problem we've found is what appears to
On Fri, 24 Aug 2007, Michael Will wrote:
I tested several NFS server configurations with a 19 node cluster.
Same, but with 150+ nodes and about 500+ CPUs.
The first advise is to stay away from redhat for file servers since
they have some bursty I/O bugs and don't support XFS.
Amen.
We've
On Sun, 11 Nov 2007, Buccaneer for Hire. wrote:
A stock kernel will from Redhat will not give you the performance
you need.
Indeed, and the people I know at Red Hat in Australia are well aware
of my thoughts on their restrictive choice of filesystems.. :-)
cheers!
Chris
--
Christopher
On Sat, 17 Nov 2007, Joe Landman wrote:
Hey Joe,
ESSL is/was generally only available to IBM customers on AIX
machines (Power class).
You can get ESSL and PESSL (no MORTAR? :-)) from IBM for Linux on
Power too. We have it on our SLES9 OpenPOWER 720 cluster.
cheers,
Chris
--
Christopher
On Fri, 16 Nov 2007, andrew holway wrote:
Come on then SC07'ers. Whats the buzz with barcelona?
We've had a 1.9GHz Barcelona node on our new cluster for a few months
now (under NDA that expired on the launch) and have been happy enough
with it to go for the full upgrade to the 2.3GHz
On Tue, 13 Nov 2007, stephen mulcahy wrote:
This prompted me to wonder how close to the bleeding edge people in
clusterland are living with regard to Linux kernel versions?
I should just point out that on our 4 year old Intel P4 cluster we run
CentOS5 with the kernels out of the CentOS Plus
On Fri, 16 Nov 2007, andrew holway wrote:
Come on then SC07'ers. Whats the buzz with barcelona?
I should also point out that we're using the PGI 7.x series of
compilers and tell our users to build with:
-tp k8-64,barcelona-64
so that they get the optimisations for both dual and quad core
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