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Re: [HTCondor-users] Target.Opsys vs Opsys

The last clause of -better-analyze (the part the sometimes makes recommendations) is pretty old code, and was not changed from the 7 series to the 8 series. (other than some minor formatting changes)

I had never noticed that the last clause would be wrong if you left off the TARGET or Arch and Opsys, but 
it makes some sense to me that that would be the case. 

The clause above that, which breaks down the requirements into the simplest Boolean operations and shows only 'relevent' ones has been changed more recently.   

As far as I know, the last clause can sometimes lie, but the one above that never does - do you agree? 


-----Original Message-----
From: HTCondor-users [mailto:htcondor-users-bounces@xxxxxxxxxxx] On Behalf Of Ian Cottam
Sent: Tuesday, March 15, 2016 7:57 AM
To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
Subject: [HTCondor-users] Target.Opsys vs Opsys

We recently switched to the 8.2 series after getting some issues with a mixed bag of 7 and 8 machines in our Pool. Anyway . . .

A colleague pointed out to me that you get better / more consistent information when you do a condor_q -better-analyze if the job Requirements look like this Requirements = (Target.OpSys == "LINUX") && (Target.Arch == "X86_64") rather than the usual Requirements = (OpSys == "LINUX") && (Arch == "X86_64")

To my surprise he is correct.
He thought it was a change in the 8 series, but as I see no mention in the manual I expect it has always been so.

My colleague phrased it:
"People who do use the -better-analyze option would not get conflicting advice (from the same output!): In one part reporting that there are plenty of matches, and yet in another place reporting that there are no matches and advising removing the two requirements. I know that it left me wondering whether there was some subtle issue with my submit.txt file."

Ian Cottam  | Technical Support Manager | School of Computer Science  |
LF24 Kilburn Building  |  The University of Manchester  |  M13 9PL  |

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