[Swift-devel] Re: [Swft] Q about throttling

[Tiberiu Stef-Praun]

So the other thing that might have happened is that Falkon quietly
released some of the nodes (even though I requested a minimum of 30
nodes and a maximum of 50)


On 6/21/07, Ben Clifford <benc at hawaga.org.uk> wrote:
>
> My interpretation of the graph is:
>
> The two jobs that didn't get run till later (the 'spare' jobs) are
> submitted into falkon at approx t=0, along with the 24 'run straight away'
> jobs.
>
> Swift isn't holding them back.
>
> Falkon indicates that it is aware of them from approx time = 0 but doesn't
> run them until t=500000.
>
> That means, I think, that they're getting into Falkons queue right at the
> start, and its something happening with how Falkon places them onto worker
> nodes that isn't right here.
>
> At least that's my first impression.
>
> On Thu, 21 Jun 2007, Tiberiu Stef-Praun wrote:
>
> > No
> > I'm saying that swift throttle value will allow me to make full use of
> > all the nodes that Falkon makes available for me. I know that I had 26
> > jobs to be run, and I requested (and had) 30 nodes in the cluster.
> > Somehow only 24 jobs run in the first time, so I'm going to push up
> > the throttle value in Swift
> >
> > Tibi
> >
> >
> > On 6/21/07, Ben Clifford <benc at hawaga.org.uk> wrote:
> > >
> > >
> > >
> > > On Thu, 21 Jun 2007, Tiberiu Stef-Praun wrote:
> > >
> > > > No
> > > > My chart shows that if I had two more machines during the first stage
> > > > run (the first 26 jobs), I would have avoided a long wait (50000 ms ,
> > > > or about 9 minutes) for the last two jobs from the first batch to
> > > > finish.
> > > > This is why I need to redo the Econ run, with a different throttle
> > > > value for Swift.
> > >
> > > So you are saying that changing the 'throttle value for swift' will
> > > allocate more machines for you?
> > >
> > > --
> > >
> >
> >
> >
>


-- 
Tiberiu (Tibi) Stef-Praun, PhD
Research Staff, Computation Institute
5640 S. Ellis Ave, #405
University of Chicago
http://www-unix.mcs.anl.gov/~tiberius/