Re: [Beowulf] Are disk MTBF ratings at all useful?

2013-04-20 Thread Andrew Holway
> The net of all this is that (and I'll bet you if you read all 21 of the > references, you'll find this).. Disk drive life time is very hard to > predict. I dunno about that; the error bars are not that big. Given a big enough sample size I think you could predict failure rates with some accuracy

Re: [Beowulf] Are disk MTBF ratings at all useful?

2013-04-20 Thread Lux, Jim (337C)
On 4/20/13 3:08 PM, "Andrew Holway" wrote: >Did anyone post this yet? I thinking this is one of the definitive >works on disk failure. > >http://static.googleusercontent.com/external_content/untrusted_dlcp/resear >ch.google.com/en//archive/disk_failures.pdf > >On 19 April 2013 17:56, Joe Landman

Re: [Beowulf] Are disk MTBF ratings at all useful?

2013-04-20 Thread Andrew Holway
Did anyone post this yet? I thinking this is one of the definitive works on disk failure. http://static.googleusercontent.com/external_content/untrusted_dlcp/research.google.com/en//archive/disk_failures.pdf On 19 April 2013 17:56, Joe Landman wrote: > On 4/19/2013 11:47 AM, mathog wrote: >>> My

Re: [Beowulf] Are disk MTBF ratings at all useful?

2013-04-20 Thread Lux, Jim (337C)
On 4/19/13 4:38 PM, "mathog" wrote: >Joe Landman wrote > >> Use AFR and warranty, ignore everything else. MTBF does not >> correlate >> at all against AFR, and AFR is an objective measure. > >MTBF is the inverse of the AFR times the number of hours in a year. > >The ratings I would really like

Re: [Beowulf] Definition of HPC

2013-04-20 Thread Lux, Jim (337C)
On 4/19/13 12:31 PM, "Adam DeConinck" wrote: >-BEGIN PGP SIGNED MESSAGE- >Hash: SHA1 > >On Fri, Apr 19, 2013 at 05:10:37PM +0100, Tim Cutts wrote: >> Anyone running a research computing setup has encountered both of these >>issues. Virtualisation mitigates the damage that can be done, w

[Beowulf] weekend fun.

2013-04-20 Thread James Cuff
Some of ya'll old timers make get a chuckle out of this. I was going to call this one: "remembering the days before all this new fancy pants devops and this hpc on the cloud nonsense" http://blog.jcuff.net/2013/04/little-known-technologies-that-helped.html j. Dr. James Cuff Chief Technology O

[Beowulf] Computational Neuroscience (free online Coursera)

2013-04-20 Thread Eugen Leitl
https://class.coursera.org/compneuro-001/wiki/view?page=syllabus Syllabus & Schedule About the Course Understanding how the brain works is one of the fundamental challenges in science today. This course will introduce you to basic computational techniques for analyzing, modeling, and understan