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Date: Thu, 10 Sep 2009 14:55:21 -0700
Message-ID: <4aa34eb70909101455g476a65e7tf845f0aa2855944c@mail.gmail.com>
Subject: Re: Question about Balancer
From: Dhruba Borthakur <dhruba@gmail.com>
To: hdfs-user@hadoop.apache.org
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This is used by the datanodes to throttle IO requests, so you would have to
set this in the config file used by the datanode(s) and then restart those
datanodes.

thanks,
dhruba


On Thu, Sep 10, 2009 at 2:50 PM, Harold Lim <rold_50@yahoo.com> wrote:

> I currently have an HDFS cluster. On another separate machine (not part of
> the HDFS cluster but has the hdfs binaries), I want to run balancer.
> The JavaDoc mentions about  dfs.balance.bandwidthPerSec parameter.
> Where do I set this? Do I add this into my hdfs-site.xml? Do I have to also
> add this parameter in all datanode/namenode? Or do I simply add that on the
> machine that is going to run the balancer?
>
> Suppose, I want a different bandwidthPerSec. Do I have to simply modify the
> hdfs-site.xml before running the balancer script?
>
>
>
>
>
> Thanks,
> Harold
>
>
>
>

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This is used by the datanodes to throttle IO requests, so you would have to=
 set this in the config file used by the datanode(s) and then restart those=
 datanodes.<br><br>thanks,<br>dhruba<br><br><br><div class=3D"gmail_quote">
On Thu, Sep 10, 2009 at 2:50 PM, Harold Lim <span dir=3D"ltr">&lt;<a href=
=3D"mailto:rold_50@yahoo.com">rold_50@yahoo.com</a>&gt;</span> wrote:<br><b=
lockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, 20=
4, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I currently have an HDFS cluster. On another separate machine (not part of =
the HDFS cluster but has the hdfs binaries), I want to run balancer.<br>
The JavaDoc mentions about =A0dfs.balance.bandwidthPerSec parameter.<br>
Where do I set this? Do I add this into my hdfs-site.xml? Do I have to also=
 add this parameter in all datanode/namenode? Or do I simply add that on th=
e machine that is going to run the balancer?<br>
<br>
Suppose, I want a different bandwidthPerSec. Do I have to simply modify the=
 hdfs-site.xml before running the balancer script?<br>
<br>
<br>
<br>
<br>
<br>
Thanks,<br>
<font color=3D"#888888">Harold<br>
<br>
<br>
<br>
</font></blockquote></div><br>

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