2009/4/24 Jason Clinton :
>
>
> At Advanced Clustering, we use this reporting facility in our Breakin
> software--we run BLAS-optimized linpack from a RAM filesystem and watch for
> EDAC messages.
>
Good stuff!Clustering - you're doing it right.
(Pardon my lolspeak).
___
Prentice Bisbal wrote:
Gerry Creager wrote:
David Mathog wrote:
Huw Lynes wrote:
http://blog.revolution-computing.com/2009/04/blame-it-on-cosmic-rays.html
Apparently someone ran a large cluster job with both ECC and none-ECC
RAM. They consistently got the wrong answer when foregoing ECC.
John Hearns wrote:
> 2009/4/24 Prentice Bisbal :
>> Last time this issue came up, he included links to several papers on
>> this topic published by Boeing. As you go up in the atmosphere, the
>> [prevalence|probability|concentration] of cosmic rays goes up
>> significantly. Boeing has done a lot of
Залетнев Дмитрий wrote:
>
>> is it possible to have a single multicored machine as a cluster?
>>
>> --
>> Jonathan Aquilina
>
> I have a 2-core machine with a lot of memory and GLAN NIC
PC, yes?
> and two PS3 with 8 cores each with 256 MB of RAM and slow GLAN network,
> thanks to PS3's "hyper
John Hearns wrote:
> I don't have time to Google at the moment - I'm making obeisances at
> the altar of a supercomputer - but wasn;t there a large dose for every
> Concorde flight? Did the flight crew have to wear radiation badges, or
> am I going dotty in my old age?
>
http://www.britishairwa
Huw,
I've seen similar cases. A not-to-be-named company that I worked at
decided to cut corners (and save cash) by purchasing a non-ECC cluster
to expand their processing systems. Needless to say, jobs failed or
returned incorrect results. All what you need to to do is multiply
utlization ( > 90%)
> is it possible to have a single multicored machine as a cluster?
>
> --
> Jonathan Aquilina
I have a 2-core machine with a lot of memory and GLAN NIC and two PS3 with 8
cores each with 256 MB of RAM and slow GLAN network, thanks to PS3's
"hypervisor", AIX-based native PS3 system, on witch
On Fri, Apr 24, 2009 at 12:49 AM, John Hearns wrote:
> 2009/4/23 Nifty Tom Mitchell :
> > On Thu, Apr 23, 2009 at 04:45:08PM +0100, Huw Lynes wrote:
> >
> > IMO Running on a large cluster without multiple bit detection and a
> minimum of one bit
> > correction ECC is silly.
> >
> > Further running
2009/4/24 Joshua Baker-LePain :
> On Fri, 24 Apr 2009 at 6:49am, John Hearns wrote
>
>> Plus couple that with command-line utilities to flash BMC, CMC and
>> BIOSes and you've got a winner.
>
> But can you twiddle BIOS settings from within the OS?
I do not think so.
One day. Come the revolution, c
On Fri, 24 Apr 2009 at 6:49am, John Hearns wrote
Plus couple that with command-line utilities to flash BMC, CMC and
BIOSes and you've got a winner.
But can you twiddle BIOS settings from within the OS?
--
Joshua "don't cross the streams" Baker-LePain
QB3 Shared Cluster Sysadmin
UCSF
_
im impressed with the different views everyone has. i dont know how
I still don't quite understand what differences you're referring to.
many of you would agree with me a multicore processor lets say a
quad is 4 nodes in one. could one say it like that?
no. a multicore processor
2009/4/24 Prentice Bisbal :
>
> Last time this issue came up, he included links to several papers on
> this topic published by Boeing. As you go up in the atmosphere, the
> [prevalence|probability|concentration] of cosmic rays goes up
> significantly. Boeing has done a lot of research on this topic
On 4/24/09 9:16 AM, "Prentice Bisbal" wrote:
Glen Beane wrote:
>
>
>
> On 4/24/09 3:03 AM, "Jonathan Aquilina" wrote:
>
> im impressed with the different views everyone has. i dont know how
> many of you would agree with me a multicore processor lets say a
> quad is 4 nodes in one
For SMP machines, there's also the numa view of a node, which may make sense if
you're willing to tweak the batch system to the cpuset level:
[arno...@co-login ~]$ numactl --hardware
available: 16 nodes (0-15)
node 0 size: 7875 MB
node 0 free: 7268 MB
node 1 size: 7888 MB
node 1 free: 7315 MB
nod
Glen Beane wrote:
>
>
>
> On 4/24/09 3:03 AM, "Jonathan Aquilina" wrote:
>
> im impressed with the different views everyone has. i dont know how
> many of you would agree with me a multicore processor lets say a
> quad is 4 nodes in one. could one say it like that?
>
> I would not
Gerry Creager wrote:
> David Mathog wrote:
>> Huw Lynes wrote:
>>
>>> http://blog.revolution-computing.com/2009/04/blame-it-on-cosmic-rays.html
>>>
>>>
>>> Apparently someone ran a large cluster job with both ECC and none-ECC
>>> RAM. They consistently got the wrong answer when foregoing ECC.
>>
>
On Fri, 24 Apr 2009, John Hearns wrote:
2009/4/24 Greg Lindahl :
On Thu, Apr 23, 2009 at 10:20:02PM -0400, Robert G. Brown wrote:
On clusters of ~300 nodes over burnin times of weeks, I was easily
able to see the difference between sea level, Boulder, and
Albuquerque, with 2000's-era memory.
On 4/24/09 8:07 AM, "Jonathan Aquilina" wrote:
in a way arent multicore processors taking for example 4 single core
machines and merging them into one with 1 for core processor?
I think the term "node" is a loaded term in HPC. This is what comes to mind
when I hear node, and I'm sure a lot
in a way arent multicore processors taking for example 4 single core
machines and merging them into one with 1 for core processor?
On 4/24/09, Glen Beane wrote:
>
>
>
> On 4/24/09 3:03 AM, "Jonathan Aquilina" wrote:
>
> im impressed with the different views everyone has. i dont know how many of
On 4/24/09 3:03 AM, "Jonathan Aquilina" wrote:
im impressed with the different views everyone has. i dont know how many of you
would agree with me a multicore processor lets say a quad is 4 nodes in one.
could one say it like that?
I would not. To me a node is a physical thing. One or mor
On Fri, 24 Apr 2009, John Hearns wrote:
2009/4/24 Robert G. Brown :
I don't think memory is all that unstable, especially down where I live.
In Denver, maybe. I think you need a lot of RAM, for a long time, to
see a lot of radiation induced errors, or a source of high energy
particles.
I t
2009/4/24 Greg Lindahl :
> On Thu, Apr 23, 2009 at 10:20:02PM -0400, Robert G. Brown wrote:
>
>
> On clusters of ~300 nodes over burnin times of weeks, I was easily
> able to see the difference between sea level, Boulder, and
> Albuquerque, with 2000's-era memory.
H. All we need is IEEE-1588 p
im impressed with the different views everyone has. i dont know how many of
you would agree with me a multicore processor lets say a quad is 4 nodes in
one. could one say it like that?
On Thu, Apr 23, 2009 at 9:06 PM, Nifty Tom Mitchell
wrote:
> On Tue, Apr 21, 2009 at 09:46:07PM +0200, Jonathan
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