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Date: Thu, 14 Feb 2013 12:36:40 -0800
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 <CA+KHwQZ=0t3ao6LFF16kZyjPbZhGat8OWMq5BFPAJnaxVOaO3w@mail.gmail.com>
Subject: Re: How to identify datanodes in a cluster
From: Robert Molina <rmolina@hortonworks.com>
To: user@hadoop.apache.org
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Hi Savitha,
On your nodes running tasktrackers and datanodes, there is a core-site.xml
file that specifies the namenode to contact via the property fs.default.name.
In addition, there is a mapred-site.xml which specifies address of
jobtracker.

I hope that helps.

Regards,
Robert

On Thu, Feb 14, 2013 at 10:23 AM, Henjarappa, Savitha <
savitha.henjarappa@hp.com> wrote:

>  All,
>
> My questions
>
>    - If I have multiple Hadoop clusters, how do I make put which DataNode
>    is configured to which NameNode? Similary  Task Tracker to JobTracker?
>    - Can I install Map and Reduce on separate Nodes? Is there any usecase
>    to support this configuration.
>
>
> Thanks,
> Savitha
>
>
>
>
>
>

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Hi Savitha,=A0<div>On your nodes running tasktrackers and datanodes, there =
is a core-site.xml file that specifies the namenode to contact via the prop=
erty=A0<a href=3D"http://fs.default.name">fs.default.name</a>. In addition,=
 there is a mapred-site.xml which specifies address of jobtracker. =A0</div=
>
<div><br></div><div>I hope that helps.=A0</div><div><br></div><div>Regards,=
=A0</div><div>Robert<br><br><div class=3D"gmail_quote">On Thu, Feb 14, 2013=
 at 10:23 AM, Henjarappa, Savitha <span dir=3D"ltr">&lt;<a href=3D"mailto:s=
avitha.henjarappa@hp.com" target=3D"_blank">savitha.henjarappa@hp.com</a>&g=
t;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">


<div>
<font face=3D"Calibri"><span style=3D"font-size:11pt">
<div>All,</div>
<div>=A0</div>
<div>My questions</div>
<ul style=3D"margin:0;padding-left:36pt">
<li>If I have multiple Hadoop clusters, how do I make put which DataNode is=
 configured to which NameNode? Similary=A0 Task Tracker to JobTracker?</li>=
<li>Can I install Map and Reduce on separate Nodes? Is there any usecase to=
 support this configuration.</li>
</ul>
<div><font face=3D"Times New Roman">=A0</font></div>
<div>Thanks,<br>

Savitha</div>
<div>=A0</div>
<div><font face=3D"Times New Roman">=A0</font></div>
<div><font face=3D"Times New Roman">=A0</font></div>
<div><font face=3D"Times New Roman">=A0</font></div>
<div><font face=3D"Times New Roman">=A0</font></div>
</span></font>
</div>

</blockquote></div><br></div>

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