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From hadoop hive <hadooph...@gmail.com>
Subject Re: Multiple datanodes on single machine !!
Date Mon, 11 Aug 2014 05:53:33 GMT
How much memory it have and how many maps and reducer you have set with how
much heap size?
On Aug 11, 2014 11:17 AM, "Sindhu Hosamane" <sindhuht@gmail.com> wrote:

> Hello,
>
> I have set up multiple datanodes on a single machine following the
> instructions in http://mail-archives.apache.org/mod_mbox/hadoop-
> common-user/201009.mbox/%3CA3EF3F6AF24E204B812D1D24CCC8
> D71A03688F76@mse16be2.mse16.exchange.ms%3E
> So i see 2 datanodes up and running when i run jps command.
> The machine on which i set this 2 datanode hadoop is very powerful - means
> it has 96 cores .
> But still i dont get significant performance from 2 datanodes .  How do i
> make sure 2 datanodes are being used.
> Or why does performance fail with 2 datanodes on same machine even when i
> work on a powerful machine?
>
> Because before tweaking hadoop with those mapped properties  to improve
> performance, i want know if i get any performance from 2 datanodes(since i
> am working on a powerful server)
>
> Any of your advices would be helpful.
>
>

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