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Date: Wed, 15 Oct 2014 08:15:36 -0400
Message-ID: 
 <CAEo-6+T1Bo1ZDFA1yK6OwihzE34U_GE_0O9MjWGyi4C9b0TYZw@mail.gmail.com>
Subject: Re: number of mappers allowed in a container in hadoop2
From: Shahab Yunus <shahab.yunus@gmail.com>
To: "user@hadoop.apache.org" <user@hadoop.apache.org>
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It depends on memory settings as well, that how much you want to assign
resources to each container. Then yarn will run as many mappers in parallel
as possible.

See this:
http://hortonworks.com/blog/how-to-plan-and-configure-yarn-in-hdp-2-0/
http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.0.6.0/bk_installing_manually_book/content/rpm-chap1-11.html

Regards,
Shahab

On Wed, Oct 15, 2014 at 8:09 AM, SACHINGUPTA <sachin@datametica.com> wrote:

> Hi guys
>
> I have situation in which i have machine with 4 processor and i have 5
> containers so does it mean i can have only 4 mappers running parallely at a
> time
>
> and number of mappers is not dependent on the number of containers in a
> machine then what is the use of container concept
>
> sorry if i have asked anything obvious.
>
> --
> Thanks
> Sachin Gupta
>
>

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<div dir=3D"ltr">It depends on memory settings as well, that how much you w=
ant to assign resources to each container. Then yarn will run as many mappe=
rs in parallel as possible.<div><br></div><div>See this:</div><div><a href=
=3D"http://hortonworks.com/blog/how-to-plan-and-configure-yarn-in-hdp-2-0/"=
>http://hortonworks.com/blog/how-to-plan-and-configure-yarn-in-hdp-2-0/</a>=
<br></div><div><a href=3D"http://docs.hortonworks.com/HDPDocuments/HDP2/HDP=
-2.0.6.0/bk_installing_manually_book/content/rpm-chap1-11.html">http://docs=
.hortonworks.com/HDPDocuments/HDP2/HDP-2.0.6.0/bk_installing_manually_book/=
content/rpm-chap1-11.html</a><br></div><div><br></div><div>Regards,</div><d=
iv>Shahab</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quo=
te">On Wed, Oct 15, 2014 at 8:09 AM, SACHINGUPTA <span dir=3D"ltr">&lt;<a h=
ref=3D"mailto:sachin@datametica.com" target=3D"_blank">sachin@datametica.co=
m</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margi=
n:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi guys<br>
<br>
I have situation in which i have machine with 4 processor and i have 5 cont=
ainers so does it mean i can have only 4 mappers running parallely at a tim=
e<br>
<br>
and number of mappers is not dependent on the number of containers in a mac=
hine then what is the use of container concept<br>
<br>
sorry if i have asked anything obvious.<span class=3D"HOEnZb"><font color=
=3D"#888888"><br>
<br>
-- <br>
Thanks<br>
Sachin Gupta<br>
<br>
</font></span></blockquote></div><br></div>

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