It makes perfect sense. My BG/P nodes don't swap and only have 512
MB/core. But before I do it myself, I want to see if anyone else did
this with negative effects.
Truly diskless nodes would have to be swapless, but a lot of people use
'diskless' to mean no OS installed locally, but there's still a disk in
the node for local scratch or swap.
I did some googling searching this afternoon, and I saw a lot of people
recommending it for HPC nodes, but it sounded like they were talking
based on theory rather than actual practice which is why I'm looking for
actual practitioners.
One person already replied off list and says he does this without any
issues.
Prentice
On 02/06/2015 05:38 PM, Novosielski, Ryan wrote:
It does seem like a good idea on the face of it. I would have to check
if we do that, but I know that the jobs we tend to run don't happen to
come close to using all of the physical memory on the machines anyway,
so there ought not really be an impact, I'd think.
____ *Note: UMDNJ is now Rutgers-Biomedical and Health Sciences*
|| \\UTGERS |---------------------*O*---------------------
||_// Biomedical | Ryan Novosielski - Senior Technologist
|| \\ and Health | [email protected] <mailto:[email protected]>-
973/972.0922 (2x0922)
|| \\ Sciences | OIRT/High Perf & Res Comp - MSB C630, Newark
`'
On Feb 6, 2015, at 17:34, Prentice Bisbal <[email protected]
<mailto:[email protected]>> wrote:
Do any of you disable swap on your compute nodes?
I brought this up in a presentation I gave last night on HPC system
administration, but realized I never actually did this, or know of
anyone who has. I would tweak the vm.overcommit_memory setting, but
that's not the same as disabling swap altogether. I'd like to try doing
this in the future, but I prefer to learn from someone else's mistakes
first.
--
Prentice
_______________________________________________
Beowulf mailing list, [email protected]
<mailto:[email protected]> sponsored by Penguin Computing
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
_______________________________________________
Beowulf mailing list, [email protected] sponsored by Penguin Computing
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
