Hi,
AFAIK right now they are only doing FCFS scheduling. You can read the code
in org.apache.hadoop.mapred.JobTracker.java. I think the code in
"getNewTaskForTaskTracker" method.
- Jaideep
On Feb 13, 2008 11:02 PM, Zhu Huijun <[EMAIL PROTECTED]> wrote:

> Thanks. Do you have any idea about where is the scheduling module in the
> source files?
>
> 2008/2/13, Ahmad Humayun <[EMAIL PROTECTED]>:
> >
> > Its not a separate module, as far as I know, its just part of the whole
> > Hadoop implementation. If you would like to use it somewhere else, it
> > would
> > take some serious surgery :)
> >
> > I'm sure you didn't want to hear this, but this is what I know. Although
> > I'll recommend you to ask others too :)
> >
> > regards,
> >
> > On Feb 13, 2008 10:18 PM, Zhu Huijun <[EMAIL PROTECTED]> wrote:
> >
> > > Thank you, Ahmad Humayun. I am not asking for the idea of MapReduce.
> > What
> > > I
> > > am asking is the scheduling scheme in Hadoop. I am wondering whether
> the
> > > scheduling module is a part of any library implemented in Hadoop, or
> the
> > > scheduling of Hadoop is based on the infrastructure under which Hadoop
> > is
> > > installed.
> > >
> > > 2008/2/13, Ahmad Humayun <[EMAIL PROTECTED]>:
> > > >
> > > > The ideas were originally published as MapReduce by Jeffrey
> > > > Dean<http://labs.google.com/people/jeff>and Sanjay
> > > > Ghemawat <http://labs.google.com/people/sanjay> at Google. Have a
> look
> > > at:
> > > > http://labs.google.com/papers/mapreduce.html
> > > >
> > > >
> > > > regards,
> > > >
> > > > On Feb 13, 2008 9:21 PM, Zhu Huijun <[EMAIL PROTECTED]> wrote:
> > > >
> > > > > Dear all,
> > > > >
> > > > > Recently we are invesgating dynamic scheduling of parallel
> > > IO-intensive
> > > > > applications in large-scale cluster. We are interested in Hadoop,
> > > > > especially
> > > > > its task scheduling schemes. Is the scheduling module a part of
> any
> > > > > library
> > > > > of Hadoop, or is it a standalone library? Is there any
> publications
> > > > > specific
> > > > > on scheduling in Hadoop? Could you please share some details about
> > > > > scheduling or suggest some literature of Hadoop?
> > > > >
> > > > > Thanks!
> > > > >
> > > > > Best wishes,
> > > > >
> > > > > Huijun Zhu
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > Ahmad Humayun
> > > > Research Assistant
> > > > Computer Science Dpt., LUMS
> > > > +92 321 4457315
> > > >
> > >
> >
> >
> >
> > --
> > Ahmad Humayun
> > Research Assistant
> > Computer Science Dpt., LUMS
> > +92 321 4457315
> >
>



-- 
Jaideep Dhok

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