[Swift-user] job waiting

Yue, Chen - BMD yuechen at bsd.uchicago.edu
Tue Apr 21 10:53:02 CDT 2009

Hi Ben and Mihael,
Thanks for answering my questions. I will try to set the maxwalltime in tc.data in my application and let you know how it works.
My Swift installation is at /home/yuechen/swift-0.8 on Communicado. Please let me know if you see any problem in my setup.
Thank you very much!
Chen, Yue


From: Mihael Hategan [mailto:hategan at mcs.anl.gov]
Sent: Sun 4/19/2009 11:20 AM
To: Ben Clifford
Cc: Yue, Chen - BMD; swift user
Subject: RE: [Swift-user] job waiting

On Sun, 2009-04-19 at 07:07 +0000, Ben Clifford wrote:
> On Sat, 18 Apr 2009, Yue, Chen - BMD wrote:
> > Thanks for answering my question. This phenomena occur after half an
> > hour of execution. If all the jobs finish execution at original speed,
> > it would probably take not more than 40 min. How the system figure out
> > that some jobs will take more than 1 hour? Should I request more time
> > when I execute "grid-proxy-init"?
> Not with grid-proxy-init. You can specify a parameter called maxwalltime
> in your sites file or your tc.data file that will tell Swift an upper
> bound on how long your job will run. In Swift 0.8, coasters assume
> something like 10 minutes if you do not specify a walltime, so you will
> run into trouble.
> For example, change the null at the end of your tc.data lines to
> globus::maxwalltime=50  to mean 50 minutes maxwalltime.
> There has been work done on coasters since Swift 0.8, and so Mihael may
> have some other recommendations.

Yes. Coasters are experimental. As such, there are problems. However,
you may get better results with the current development version.

> > I did not change the default throttles. How much is more appropriate?
> > The total number of jobs in my application typically run between 4000
> > and 30000 and typically each job can be finished within a couple of
> > minutes.
> Where is your Swift installation? I would liek to look at it.

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