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From: Mohammad Tariq <dontariq@gmail.com>
Date: Wed, 15 Aug 2012 06:11:07 +0530
Message-ID: 
 <CAMVC6RNVJUiDompTur_30NuqbDBRwXtEa4N7tNScfVrjh753fw@mail.gmail.com>
Subject: Re: Hello! - Hadoop: System Requirements.
To: user@hadoop.apache.org
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You can visit this link, if you need some help on how to configure Hadoop
in pseudo mode :
http://cloudfront.blogspot.in/2012/07/how-to-configure-hadoop.html

Regards,
    Mohammad Tariq


On Wed, Aug 15, 2012 at 4:54 AM, Jeffrey Silverman <jeffsilverman@google.com
> wrote:

> Cristian,
>
> You have a basic network problem.  You have a single name, RHEL, which
> points to two IP addresses, 10.9.6.160 and 10.9.0.188.  That won't work.
>  The /etc/hosts file is searched sequentially  so it always finds the
> first occurrence of RHEL.
>
> By default, any process that listens on all interfaces will listen on the
> loopback interface ( 127.0.0.1).
>
> You have an additional problem and that is that wherever you go, your IP
> address is going to change.  There is a document on the subject, RFC 1918.
>  Basically, any IP address that begins with 10., 172.12 through 172.31, and
> 192.168 is a private address.  You're getting the 10.9.6.180 and 10.9.0.188
> addresses from the network, and that's unusual but perfectly legitimate.
>
> If you are only going to use these two addresses, then what you can do is
> add the following to your /etc/hosts file:
>
> # wireless
> 10.9.6.160 RHEL6_wireless
> # wired
> 10.9.0.188 RHEL6_wired
>
>  When your systems attempt to connect to the wired IP address and you are
> running in wireless mode, then the connection attempt will fail and the
> map/reduce software won't send any work to.  Similarly, if you attempt to
> connect to the wireless IP address and you are wired.
>
>
> Jeff Silverman
> Google
>
>

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You can visit this link, if you need some help on how to configure Hadoop i=
n pseudo mode :=A0<div><a href=3D"http://cloudfront.blogspot.in/2012/07/how=
-to-configure-hadoop.html">http://cloudfront.blogspot.in/2012/07/how-to-con=
figure-hadoop.html</a></div>

<div><br clear=3D"all">Regards,<div>=A0=A0 =A0Mohammad Tariq</div><br>
<br><br><div class=3D"gmail_quote">On Wed, Aug 15, 2012 at 4:54 AM, Jeffrey=
 Silverman <span dir=3D"ltr">&lt;<a href=3D"mailto:jeffsilverman@google.com=
" target=3D"_blank">jeffsilverman@google.com</a>&gt;</span> wrote:<br><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #cc=
c solid;padding-left:1ex">

Cristian,<div><br></div><div>You have a basic network problem. =A0You have =
a single name, RHEL, which points to two IP addresses,=A0<span style=3D"col=
or:rgb(34,34,34);font-family:&#39;Courier New&#39;">10.9.6.160 and=A0</span=
><span style=3D"color:rgb(34,34,34);font-family:&#39;Courier New&#39;">10.9=
.0.188</span>. =A0That won&#39;t work. =A0The<font face=3D"courier new, mon=
ospace"> /etc/host</font>s file is searched sequentially =A0so it always fi=
nds the first=A0occurrence=A0of RHEL.</div>


<div><br></div><div>By default, any process that listens on all interfaces =
will listen on the loopback interface ( 127.0.0.1).</div><div><br></div><di=
v>You have an additional problem and that is that wherever you go, your IP =
address is going to change. =A0There is a document on the subject, RFC 1918=
. =A0Basically, any IP address that begins with 10., 172.12 through 172.31,=
 and 192.168 is a private address. =A0You&#39;re getting the 10.9.6.180 and=
 10.9.0.188 addresses from the network, and that&#39;s unusual but perfectl=
y legitimate.</div>


<div><br></div><div>If you are only going to use these two addresses, then =
what you can do is add the following to your /etc/hosts file:</div><div><br=
></div><div><font face=3D"Courier New" style=3D"color:rgb(34,34,34)"># wire=
less<br>


10.9.6.160 RHEL6_wireless</font><br style=3D"color:rgb(34,34,34);font-famil=
y:Calibri"><font face=3D"Courier New" style=3D"color:rgb(34,34,34)"># wired=
<br>10.9.0.188 RHEL6_wired</font></div>

<div><br><div class=3D"gmail_quote">=A0When your systems attempt to connect=
 to the wired IP address and you are running in wireless mode, then the con=
nection attempt will fail and the map/reduce software won&#39;t send any wo=
rk to. =A0Similarly, if you attempt to connect to the wireless IP address a=
nd you are wired.</div>


</div><div class=3D"gmail_quote"><br></div><div class=3D"gmail_quote"><br><=
/div><div class=3D"gmail_quote">Jeff Silverman</div><div class=3D"gmail_quo=
te">Google</div><div class=3D"gmail_quote"><br></div>
</blockquote></div><br></div>

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