Parallel Environment Queue Sort API

Posted by chris Tue, 20 Feb 2007 19:55:19 GMT

Is anyone using this?

While trying to prune down an overflowing email inbox, I stumbled upon a mailing list post from back in May 2006 that I had tagged as something to follow up upon. The post to the developers mailing list asked about a scheduling API for Grid Engine. One of the replies mentioned that the "Parallel Environment Queue Sort (PQS) API" had been checked into the CVS maintrunk but was not on by default.

This API exists and is apparently only documented in the following SGE source file:

source/libs/sched/sge_pqs_api.h

The API seems to provide the hooks necessary for someone to compile his or her own loadable module that can be installed in the $SGE_ROOT/lib/<arch>/ directory. One loaded, the custom code can make the final decision (based on a list of supplied candidates) as to the hosts and queue instances used for a particular parallel job.

People interested in this should read the sge_pqs_abi.h file carefully as there are many caveats and warnings. I'd be interested in hearing from anyone using this API as well.