On Wed, 2009-06-17 at 14:07 -0400, Michael Barnes wrote: > On Tue, Jun 16, 2009 at 07:28:03AM +0200, Bas van der Vlies wrote: > > I knew there is a patch for it, see: > > * http://www.mail-archive.com/[email protected]/msg00321.html > > My manager has asked me to look into the Maui fairshare because when all > of the active users are over their fairshare their fairshare weighting > becomes equal. He said it quite well: > > On Fri, Mar 27, 2009 at 10:26:36AM -0400, Chip Watson wrote: > > Michael, > > > > Maui has the following known bug: > > > > If all projects that have pending jobs are over their fairshare, and > > the other projects are not being used, then Maui takes the unused > > fairshare and divides it EQUALLY among all projects. It does NOT > > divide it up in proportion to the other projects fairshare. E.g. > > Project A share is 80, B is 19, C is 1. A goes inactive, and so the 80 > > is split equally between B and C. So B ends up with 59, and C with 41, > > changing the ratio between B and C from 19:1 to 3:2. > > > > What I'm wondering now is if the job soft limit is also subverted by > > this non-fairshare of unused fairshare. In other words, soft limit is > > only imposed if there is no one ready to run who is below their quota. > > > > Can you dig into the source code to figure this out? > > In looking at the code in MPriority.c, MFS.c, and MQueue.c, I found > that the fairshare code was a) being clamped to 0 if negative and > b) the tools like diagnose -p do not show the actual values of the > priority (they report negative numbers when they are never used). Also, > the priorities go from doubles, to longs, to ints, which could cause > problems as well. > > We run a slightly older version of Maui, and if these issues has been > fixed, I would immediately upgrade.
REJECTNEGPRIOJOBS FALSE ENABLENEGJOBPRIORITY TRUE is what you want. Not sure in which version they showed up but at least from 3.2.6p12 -- Ake Sandgren, HPC2N, Umea University, S-90187 Umea, Sweden Internet: [email protected] Phone: +46 90 7866134 Fax: +46 90 7866126 Mobile: +46 70 7716134 WWW: http://www.hpc2n.umu.se _______________________________________________ mauiusers mailing list [email protected] http://www.supercluster.org/mailman/listinfo/mauiusers
