[Beowulf] Stress / torture test cluster hardware
wscullin at ncsa.uiuc.edu
Mon Oct 9 13:50:18 PDT 2006
I am a big fan of running repeated single node HPL and HPCC runs - it
beats up memory and the cpu quite nicely. I would emphasize the
repeated part. A lot of hardware issues don't show up until machines
heat up and cool down a few times, so maybe wait a bit between runs.
Also, feel free to exceed your physical memory and use a bit of swap
too for a couple of runs - although I'd never do that for a
qualifying or tuning run. All of that said, the individual node HPLs
are the sort of baseline data that makes tuning during multinode HPLs
easier down the line.
I'd also agree with the value of thousands of tars and untars - but
I'd keep it to directories with large numbers of small files. One of
my co-workers favors /usr/include for that purpose.
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On Oct 8, 2006, at 11:32 AM, Karen Shaeffer wrote:
> On Sun, Oct 08, 2006 at 09:09:11AM +0100, John Hearns wrote:
>> Nico Mittenzwey wrote:
>> Other things to consider for a stress test are:
>> Unpack a clean Linux kernel tree. Do a kernel compile. Tar up the
>> resulting tree. Repeat, and compare the two resulting tar files.
>> A linux kernel compile is a surprisingly good way of stressing a
> I would agree compiling the linux kernel is an excellent stress
> test. I've
> set it up in an endless loop, where multiple, independent tress are
> in parallel. It does discover memory problems rather effectively,
> if you
> let it run a day or two.
> Karen Shaeffer
> Neuralscape, Palo Alto, Ca. 94306
> shaeffer at neuralscape.com http://www.neuralscape.com
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