[Bi-users] Number of cores

[Musuuza Jude]

Hi Yiheng,


I guess you already set the number of nodes to one (32 cores) in your submission script and that cannot be overridden by subsequent resource requisitions. Your job runs with all the cores on a node (thankfully it doesn't abort) but not the 35 you wished for, unless you request for more a priori. This is my "loud thought" 😊, please ask the NSC admins and share their response. For parallel computing, it might be possible to request for all available cores on a node but my memory about this is foggy ...


Best wishes,

Jude.

________________________________
From: Bi-users <bi-users-bounces at lists.nsc.liu.se> on behalf of Du Yiheng <yiheng.du at smhi.se>
Sent: 01 December 2022 10:02:06
To: bi-users at lists.nsc.liu.se
Subject: [Bi-users] Number of cores

Hi,
Good morning!
I have a question regarding how many cores can be used for parallel work. In my script I accidentally set the ncores as 35, which is larger than the core number of a node (detectCores() gives 32).
But the script still works without problem. How does it happen, should I set a limit for the number of cores used for parallel work (for example, 31) or it doesn’t matter?
Thank you very much!


/Yiheng
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.nsc.liu.se/mailman/public/bi-users/attachments/20221201/d74888fa/attachment.html>