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From: chandler song <chandler605@gmail.com>
Date: Mon, 20 Jan 2014 09:12:43 +0800
Message-ID: 
 <CAO3Q3cDGkpe_z2Yt+0ofsEd=_tCppC_J9Ajy76PisaFtd1Ai=g@mail.gmail.com>
Subject: Re: Question about Yarn
To: user@hadoop.apache.org
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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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<div dir=3D"ltr"><div><a href=3D"http://hadoop.apache.org/docs/r2.2.0/hadoo=
p-yarn/hadoop-yarn-site/WritingYarnApplications.html">http://hadoop.apache.=
org/docs/r2.2.0/hadoop-yarn/hadoop-yarn-site/WritingYarnApplications.html</=
a><br>

<br></div>this one,<br></div><div class=3D"gmail_extra"><br><br><div class=
=3D"gmail_quote">2014/1/19 Marco Shaw <span dir=3D"ltr">&lt;<a href=3D"mail=
to:marco.shaw@gmail.com" target=3D"_blank">marco.shaw@gmail.com</a>&gt;</sp=
an><br>

<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Can you clarify?<br>
<br>
What tutorial and specific sections are you referring to?<br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
Marco<br>
</font></span><div class=3D"HOEnZb"><div class=3D"h5"><br>
&gt; On Jan 19, 2014, at 9:26 AM, chandler song &lt;<a href=3D"mailto:chand=
ler605@gmail.com">chandler605@gmail.com</a>&gt; wrote:<br>
&gt;<br>
&gt; hi all<br>
&gt;<br>
&gt; =A0 I have some question about yarn when I read the tutorial on the we=
bsite.<br>
&gt;<br>
&gt; =A01) the contain is physical or logic? for example, there are three P=
Cs(A,B,C) on Cluster. =A0if I allocate one container. it will run on one PC=
 all the time. or the container will work on different PC at different time=
.<br>


&gt;<br>
&gt; 2) the contain, I can think it&#39;s a virtual PC which can run java a=
pplication? is my correct?<br>
&gt;<br>
&gt; 3)about mapreduce, how mapreduce run on yarn? after reading the tutori=
al, I think yarn and mapreduce is totally different thing. I think the basi=
c unit of yarn is container. map and reduce&#39;s basic unit is map and red=
uce.<br>


&gt;<br>
&gt; or how yarn handle concurrent? I know in mapreduce, I don&#39;t need t=
o 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&=
#39;t find yarn has same thing.<br>


&gt;<br>
</div></div></blockquote></div><br></div>

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