On 12/10/20 10:55 AM, Jon Tegner wrote:
What about
https://linux.oracle.com/switch/centos/
Regards,
/jon
Possibly a good option - if I didn't trust Oracle even less than IBM. I
wonder if ElRepo will work that the Oracle distro? RH has removed a lot
of hardware support lately an
What about
https://linux.oracle.com/switch/centos/
Regards,
/jon
On 12/9/20 7:19 AM, Carsten Aulbert wrote:
On 09.12.20 07:12, Tony Brian Albers wrote:
> So, if you use CentOS, I can only recommend Springdale.
Just fresh from my Twitter stream:
https://github.com/hpcng/rocky
"
Rocky Linux
What kind of latency can one expect using RoCE/10G?
On 09/21/2017 05:28 PM, Douglas Eadline wrote:
I think the main reason it stopped was that IB is the
choice of most clusters and most 10G nics provide
low latency with default tcp/ip (less than 10us in most cases).
___
What about RoCE? Is this something that is commonly used (I would guess
no since I have not found much)? Are there other protocols that are
worth considering (like "gamma" which doesn't seem to be developed anymore)?
My impression is that with RoCE you have to use specialized hardware
(unlike
Isn't latency over RDMA a bit high? When I've tested QDR and FDR I tend
to see around 1 us (using mpitests-osu_latency) between two nodes.
/jon
On 08/03/2017 06:50 PM, Faraz Hussain wrote:
Here is the result from the tcp and rdma tests. I take it to mean that
IB network is performing at the ex
Hi,
I'm booting some nodes disk less, using root file system on NFS. The
first phase (PXE, tftp etc) works without problems. The second phase,
when the system is actually supposed to boot over NFS the machine hangs
about every second time - and it seems to be a result of the relevant
nic (eth
BeeGFS sounds interesting. Is it possible to say something general about
how it compares to Lustre regarding performance?
/jon
On 02/13/2017 05:54 PM, John Hanks wrote:
We've had pretty good luck with BeeGFS lately running on SuperMicro
vanilla hardware with ZFS as the underlying filesystem. I
Found out what was wrong...
Turned out the hardware was delivered with 15 of the 16 memory slots
populated
No wonder we had performance issues!
Anyway, thanks a a lot, all who answered!
/jon
On 02/29/2016 06:48 PM, Josef Weidendorfer wrote:
Am 28.02.2016 um 16:27 schrieb Jon Tegner
ers and flags.
Give more details about the software stack
Original Message
From: Jon Tegner
Sent: Sunday, February 28, 2016 22:28
To: beowulf@beowulf.org
Subject: [Beowulf] Scaling issues on Xeon E5-2680
Hi,
have issues with performance on E5-2680. Each of the nodes have 2 of
these 1
Hi,
have issues with performance on E5-2680. Each of the nodes have 2 of
these 12 core CPUs on SuperMicro SuperServer 1028R-WMR (i.e., 24 cores
on each node).
For one of our applications (CFD/OpenFOAM) we have noticed that the
calculation runs faster using 12 cores on 4 nodes compared to whe
Haven't followed this guide
http://www.admin-magazine.com/HPC/Articles/Warewulf-Cluster-Manager-Master-and-Compute-Nodes
but it certainly looks really good.
/jon
On 04/27/2014 07:08 AM, Chris Samuel wrote:
On Sat, 26 Apr 2014 10:45:05 AM Bhabani Samantray wrote:
I want to install MP
Hi,
when evaluating infiniband I usually try to run "osu_latency", "osu_bw"
and the likes (from package mpitests-openmpi). However, I have not
managed to run these between nodes where one has a Qlogic card and the
other one from Mellanox.
Is it a bad idea to try to use cards from different v
On 06/28/2013 10:56 PM, Joe Landman wrote:
>> >I don't understand your question, how can you eliminate configuration?
>> >At some point you have to tell the system what it's supposed to do.
> Its done once. Then you don't have to install it again. Its installed.
>Its done.
I think one of the
How are you planning to boot your nodes?
I have used perceus (http://www.perceus.org/) and was happy with it.
There is also Warewulf (http://warewulf.lbl.gov or
http://hpc.admin-magazine.com/Articles/Warewulf-Cluster-Manager-Master-and-Compute-Nodes)
which I haven't used.
Anyone who has compa
Hi! And thanks for answer, much appreciated!
On 08/31/2012 12:47 AM, Mark Hahn wrote:
>> However, at one point one of the machines serving the file system went
>> down, after spitting out error messages as indicated in
>> it
>> https://bugzilla.redhat.com/show_bug.cgi?id=770545
>>
>> We used the a
Hi,
have this strange error. We run CFD calculations on a small cluster.
Basically it consists of bunch of machines connected to a file system.
The file system consists of 4 servers, CentOS-6.2, ext4 and glusterfs
(3.2.7) on top. Infiniband is used for interconnect.
For scheduling/resource m
Hi list!
Is there any scheduler which has the functionality to automatically put
a running job on hold when another job with higher priority is submitted?
Preferably the state of the first job should be frozen, and saved to
disk, so that it can be restarted again when the higher priority job ha
Cool! Impressive to have taken it this far!
What are the dimensions of the system? And the mainbord
for the compute nodes, are you using mini-itx there?
Regards,
/jon
On 12/22/2011 05:51 PM, Douglas Eadline wrote:
> For those that don't know, I have been working
> on a commodity "desk side" clu
>>> DRIVERS:
>>> Drivers for cards now. Are those all open source, or does it require
>>> payment? Is the source released of all those cards drivers, and do
>>> they integrate into linux?
>> You should get everything you need from the Linux kernel and / or OFED.
>
> You can also find the drivers o
Take a look at perceus, can be really easy, check
www.infiscale.com/html/perceus_on_enterprise_linux_qu.html
Richard Chang wrote:
I am a bit new. Trying to build a cluster from ground up. I need to
build a new 32 node cluster from ground up.
Hardware has been decided, Nehalam based, but OS is
rt #, here’s what happens”, because it depends on a lot of
> things.
>
>
> On 4/14/10 1:12 AM, "Jon Tegner" <> wrote:
> > > the max temp spec is not some arbitrary knob that the chip vendors
> > &g
>
> the max temp spec is not some arbitrary knob that the chip vendors
> choose out of spiteful anti-green-ness. I wouldn't be surprised to see
> some
>
>
>
>
>
> Issue is not the temp spec of current cpus, problem is that it
Mark Hahn wrote:
I find it strange with this rather large temp range, and 55 seems
very low to my experience. Could they possibly stand for something
else? Did not find any description of the numbers anywhere on that
address.
I think you should always worry about any temperature measured on a
On Apr 13, 2010 00:24 "Lux, Jim (337C)"
wrote:
> > -Original Message-
> > From:
> > [mailto:beowulf-boun...@beowulf.org] On Behalf Of Jon Tegner
> > Sent: Monday, April 12, 2010 11:02 AM
> > To: Mark Hahn
> > Cc:
> > Subject:
well, you can look up the max operating spec for your particular chips.
for instance, http://products.amd.com/en-us/OpteronCPUResult.aspx
shows that OS8439YDS6DGN includes chips rated 55-71. (there must be
some further package marking to determine which temp spec...)
I find it strange with t
Have done some preliminary tests on the system. Indicates a CPU
temperature of 60-65 C after half an hour (will do longer test soon).
Have a few questions:
* How high cpu temperatures are acceptable (our cluster is built on 6
core AMD opterons)? I know life span is reduced if temperature is hi
ail.com>> wrote:
how much would something like this go for?
On Wed, Apr 7, 2010 at 3:56 PM, Jon Tegner mailto:teg...@renget.se>> wrote:
In this case we have large "home made" heat sinks, I'll put up
more pictures when I get the time. You can che
On Apr 7, 2010 15:34 "Jonathan Aquilina" wrote:
> is one of you an engineer? how well does the air flow in the case.
> what
> gets air into and out of the case if there are just only 2 fans on the
> box? you guys ever consider marketing this product?
>
>
We (me and my brother) have been into silent computing, and clusters,
for quite some time now. We just recently designed and built a unit
equipped with 4 supermicro boards (H8DMT) and 8 cpus. In the actual unit
the cpus are Opterons with 6 cores each, but it would be easy enough to
switch to cpus w
What about netpipe?
www.scl.ameslab.gov/netpipe/
/jon
David Mathog wrote:
Is there a common method for testing the quality of a network link
between two networked machines? This is for situations where the link
works 99.99% of the time, but should work 99.9% of the time, with
the failures
David Ramirez wrote:
Due to space constraints I am considering implementing a 8-node (+
master) HPC cluster project using small form computers. Knowing that
Shuttle is a reputable brand, with several years in the market, I
wonder if any of you out there has already used them on clusters and
ho
Hearns, John wrote:
I would guess you are looking are looking at using OpenFOAM for
There is also overture
https://computation.llnl.gov/casc/Overture/
using overlapping grids. Complete with gridgenerator and a bunch of
solvers. Excellent software!
/jon
___
There seem to be significant advantages using Scyld ClusterWare, I did
try it (Scyld?) many years ago (when it was free?) and I was impressed then.
However, when looking at penguincomputing.com I don't find any price
quotes. It seems - unless I miss something - one has to fill in a rather
leng
Robert G. Brown wrote:
Fedora installs in the future will be done by yum. Yum enables
something that is truly marvelous for people who have to install through
thin pipes (e.g. DSL links): a two stage interruptable install. It is
possible to install a barebones system in the first pass in a rela
/2007, Tim Cutts <[EMAIL PROTECTED]> wrote:
On 16 Oct 2007, at 10:19 pm, Robert G. Brown wrote:
On Tue, 16 Oct 2007, Jon Tegner wrote:
You should switch to a .deb-system, to save you some trouble:
$ apt-cache search jove
jove - Jonathan's Own Version of Emacs - a compact, po
You should switch to a .deb-system, to save you some trouble:
$ apt-cache search jove
jove - Jonathan's Own Version of Emacs - a compact, powerful editor
Sorry, couldn't resist ;-)
/jon
Robert G. Brown wrote:
I do realize (*ahem*) that I'm one of three living humans that still use
jove, an
Tony Travis wrote:
I also prefer Debian-based distro's and still run the openMosix kernel
under an Ubuntu 6.06.1 LTS server installation on our Beowulf cluster.
What I like about APT (the Debian package manager) is the dependency
checking and conflict resolution capabilities of "aptitude", w
Robert G. Brown wrote:
All of this takes time, time, time. And I cannot begin to describe my
life to you, but time is what I just don't got to spare unless my life
depends on it. That's the level of triage here -- staunch the spurting
arteries first and apply CPR as necessary -- the mere compo
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