RE: [condor-users] Extremely fast execution of java jobs!!!

["Matt Hope" <Matt.Hope@xxxxxxxx>]

are you running with a different jvm and/or tuning parameters?

> -----Original Message-----
> From: owner-condor-users@xxxxxxxxxxx
> [mailto:owner-condor-users@xxxxxxxxxxx]On Behalf Of Leighton Weymouth
> Sent: 19 May 2004 14:41
> To: condor-users@xxxxxxxxxxx
> Subject: Re: [condor-users] Extremely fast execution of java jobs!!!
> 
> 
> > Just brainstorming, here are some ideas as to why it might 
> be faster:
> >
> > - The machines in your Condor pool might simply have faster
> cpu/memory/disk
> > than your desktop machine.  Trying logging directly into 
> one and running
> > your job.
> 
> Tried that... I am running condor on a lab of computers at 
> Charles Sturt
> Uni, Australia... all the computers are the same... If I run 
> it on one of
> those computers NOT through condor... my job takes about 4 minutes to
> run.... If I run it through condor... about 1 minute!!!! Now 
> that is really
> good... but it just doesn't make sense!!!
> 
> > - If you job produces a lot of output, it will run 
> considerably faster
> > sending its output to a file than to the terminal.  (Scrolling a big
> > graphic display can be expensive.)  Try timing both of those cases.
> 
> I figured this might be the case... so I ran the same job but 
> took out all
> the printing to screen...... same result... 4 minutes out of 
> condor one
> minute with condor.
> 
> > - On your desktop machine, you might be writing your output to a
> distributed
> > file system, which can be considerably slower than using a 
> local disk.
> > For example, if your /home directory is stored on NFS and 
> /tmp is a local
> > disk, then "myprog > /home/bob/output" can be considerably 
> slower than
> > "myprog > /tmp/output".
> 
> Nope... that is defianatly not the case... all running of the 
> local disk
> (Windows XP).
> 
> > Those are just some ideas...
> > Let us know what you discover.
> 
> Thanks Doug... I'll just have to keep guessing.... but at the 
> end of the
> day... I'm not going to stress about it.... It's running my 
> job 4 times as
> fast :)
> 
> Cheers.
> 
> 
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