The showstart command will show the starttime of the specified job *IF*
it were the next job to run. You are correct that this does not take
into account other idle jobs and the order of the idle queue.
If you're interested, Moab has 3 options for showstart:
normal (same that you get with Maui)
priority (this is what you are asking for, showstart examines the job in
relation to other jobs in priority order)
historical (based on the size and duration of the job)
- Douglas
Steve Young wrote:
Thanks Ake,
I guess what I was getting at is I would expect that this would show
the start time like it does for the first idle job in the list. Then add
500 hours to those numbers and show that information for the next idle
job in the list. Then keep repeating that same idea for each job in the
list. There is no way that the last idle job can even start or complete
in the timeframe it is telling me since I know it has to process the
jobs in front of it first. I realize there are a lot of variables, a job
can only take 10 hours as opposed to 500 or whatever but in essence what
I'm getting at is given the numbers it should at least figure out that
the last job in the list would start in 500 hours X 32 jobs = 16,000
hours more than what it tells me for the first job in the list. Does
that make sense?
What I am trying to do is show that if it is going to be 22 months
before the last job can run that perhaps the user might want to shuffle
the requests around on his job to use more resources so that the jobs
complete sooner. Especially now since we have a lot more idle resources
at the moment. thanks,
-Steve
On Nov 29, 2007, at 2:28 PM, Åke Sandgren wrote:
On Thu, 2007-11-29 at 14:20 -0500, Steve Young wrote:
I just noticed this and wanted to post to see if this still an issue
or perhaps it has been fixed now.
I don't use it very much but I was using the showstart command to
look at a couple jobs to see when they might be done running. First
let me explain how the jobs are set up. A user has like 30 jobs in
the queue. All of them are set up to go to one specific machine using
the #PBS -l host=<machinename> directive. Each job is running for 500
hours so it might be some time before they are all finished. Anyhow,
I ran the showstart command on the first idle job in the showq list
and the last idle job in the showq list. Here is the output:
[EMAIL PROTECTED] ~]# showstart 48542
job 48542 requires 2 procs for 20:20:00:00
Earliest start in 20:09:26:14 on Wed Dec 19 23:26:38
Earliest completion in 41:05:26:14 on Wed Jan 9 19:26:38
Best Partition: DEFAULT
[EMAIL PROTECTED] ~]# showstart 48574
job 48574 requires 2 procs for 20:20:00:00
Earliest start in 20:09:26:14 on Wed Dec 19 23:26:38
Earliest completion in 41:05:26:14 on Wed Jan 9 19:26:38
Best Partition: DEFAULT
Both jobs show the same dates. So it would appear to me that
showstart can't really predict when the job can run. It can only
predict when the next job will be able to run? Anyone run into this
before? Thanks,
Exactly, showstart gives you an estimate of the "Earliest start" for the
job. It doesn't try to predict the future :-)
Trying to predict the actual start time is an almost impossible task.
--
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
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