hadoop-common-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ranjini Rathinam <ranjinibe...@gmail.com>
Subject Re: hadoop -Mapreduce
Date Mon, 09 Dec 2013 05:42:31 GMT
HI,

I need to use thread functionality to run more than one mapper class
parallelly.

Please suggest with some sample code.

Thanks in advance.

On Fri, Dec 6, 2013 at 4:37 PM, Subroto <ssanyal@datameer.com> wrote:

> Hi Ranjini,
>
> The number of mappers depend on InputSplits and which intern depends on
> size of input data.
> The number of reducers can be configured by "mapred.reduce.tasks"
>
> Further you can get more information on numbers of Maps and Reduce for a
> Job from:
> http://wiki.apache.org/hadoop/HowManyMapsAndReduces
>
> Running parallel mappers and reducers depends on availability of map and
> reduce slots in the cluster.
>
> Cheers,
> Subroto Sanyal
>
>  On Dec 6, 2013, at 12:00 PM, Ranjini Rathinam wrote:
>
>  HI,
>
> How to run more than one mapper and reduce parallelly.?
>
> Please suggest.Thanks in advance.
>
> Ranjini.
>
>
>

Mime
View raw message