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From chandler song <chandler...@gmail.com>
Subject Re: Question about Yarn
Date Mon, 20 Jan 2014 01:12:43 GMT
http://hadoop.apache.org/docs/r2.2.0/hadoop-yarn/hadoop-yarn-site/WritingYarnApplications.html

this one,


2014/1/19 Marco Shaw <marco.shaw@gmail.com>

> Can you clarify?
>
> What tutorial and specific sections are you referring to?
>
> Marco
>
> > On Jan 19, 2014, at 9:26 AM, chandler song <chandler605@gmail.com>
> wrote:
> >
> > hi all
> >
> >   I have some question about yarn when I read the tutorial on the
> website.
> >
> >  1) the contain is physical or logic? for example, there are three
> PCs(A,B,C) on Cluster.  if I allocate one container. it will run on one PC
> all the time. or the container will work on different PC at different time.
> >
> > 2) the contain, I can think it's a virtual PC which can run java
> application? is my correct?
> >
> > 3)about mapreduce, how mapreduce run on yarn? after reading the
> tutorial, I think yarn and mapreduce is totally different thing. I think
> the basic unit of yarn is container. map and reduce's basic unit is map and
> reduce.
> >
> > or how yarn handle concurrent? I know in mapreduce, I don't need to
> think too much about concurrent. because mapreduce will do this for you. it
> will split data into a small unit and you can do what you do. but I don't
> find yarn has same thing.
> >
>

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