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 using
Er, ah, Greg, don't hold back. How do you REALLY feel?
Greg Lindahl wrote:
On Sun, Oct 07, 2007 at 03:10:30PM -0700, Greg Lindahl wrote:
Hm, elm doesn't compile
anymore, I wonder if anyone will notice if I just delete it?
Of course, my CEO noticed about 10 minutes later!
I told him to use
On Sun, Oct 07, 2007 at 03:10:30PM -0700, Greg Lindahl wrote:
> Hm, elm doesn't compile
> anymore, I wonder if anyone will notice if I just delete it?
Of course, my CEO noticed about 10 minutes later!
I told him to use a real mailer, like mutt. ;-)
-- greg
__
Sorry that this is a "late hit" on this topic, but every time someone
mentions Gentoo, I have to count to 100,000 before I say anything.
>From what I can tell, the dependency stuff in Gentoo mostly works. If
you try to not update any packages unless they have a security issue,
you will discover a
Bill Rankin wrote:
Let me offer up a somewhat concrete example of a problem with hardware
raid.
A local group around here kept some Very Important Data on a hardware
raid array. Due to several factors, a backup was not made of certain
data. The device lost a drive and started an automagic
Geoff Galitz wrote:
Why do you automatically distrust hardware raid?
Because they are low volume parts designed to handle failure modes in very
complicated environments. If you buy a hardware RAID card you very well could
have the only one on the planet with that exact config. Variables i
On Sun, Oct 07, 2007 at 12:54:42PM -0400, Mike Davis wrote:
> Controllers can have problems, but so can software.
The point is that you have to keep a hardware spare with hardware RAID.
This can make things much more expensive. Also, software RAID
is typically free, while a hardware RAID of simil
And what would happen if 2 drives died on a software RAID5? The problem
with the example is that it could happen whether one uses software or
hardware RAID. The real issue is that important data was stored and not
backed up. Bad things happen when you have a bad storage strategy.
I have run HW
Guy Coates wrote:
> Luns over 2TB are a bad idea. There are just too many reasons why they might
> not
> work, and trying to track down the right one is a pain.
>
> Your workaround to use the LVM to stripe 3x1TB luns together is the way to go.
> (You really want to use LVM anyhow, as trying to d
On Oct 5, 2007, at 4:17 PM, Leif Nixon wrote:
"Geoff Galitz" <[EMAIL PROTECTED]> writes:
Why do you automatically distrust hardware raid?
To some extent I share Mark's sentiment. I certainly trust the
Linux kernel more than the firmware in a cheap raid controller.
Let me offer up a somewh
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