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[HTCondor-users] ClassAds use in condor config RANK and START
- Date: Thu, 10 Oct 2013 13:53:33 +0200
- From: Alex Waite <alexander.waite@xxxxxxx>
- Subject: [HTCondor-users] ClassAds use in condor config RANK and START
We have one machine which we wish to add to our Condor Pool, but in an
experimental capacity. It is very different from all other machines, and
we do not want "normal" jobs to execute on it. Instead, I only want jobs
which specifically request it (I was thinking via a ClassAd requirement)
to execute on that node.
However, from what I understand, a job's REQUIREMENTS resolves to a
boolean by the time the condor config parses it. So examining what a
jobs requirements were/are is not possible.
As an aside, I could see this being useful for ranking scenarios too.
If, say, you have one machine with unique capabilities (specialized
software, CPU performance, etc), it would nice nice to be able to have
the machine itself prefer jobs which explicitly request its features via
a ClassAd. I know this can be done using other attributes such as:
RANK = ImageSize
But I don't see how it's possible with ClassAds.
Any insight would be most welcome.