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

[Ioan Raicu]

Right, I think that is what happened.   Send me the logs I asked for in 
a previous email, and we can plot both files on the same graph, and we 
will have the answer!

Ioan

Tiberiu Stef-Praun wrote:
> 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?
>> > >
>> > > --
>> > >
>> >
>> >
>> >
>>
>
>

-- 
============================================
Ioan Raicu
Ph.D. Student
============================================
Distributed Systems Laboratory
Computer Science Department
University of Chicago
1100 E. 58th Street, Ryerson Hall
Chicago, IL 60637
============================================
Email: iraicu at cs.uchicago.edu
Web:   http://www.cs.uchicago.edu/~iraicu
       http://dsl.cs.uchicago.edu/
============================================
============================================