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MapReduce, mail # user - Question related to Number of Mapper


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Ramasubramanian Narayanan... 2012-11-07, 16:20
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Re: Question related to Number of Mapper
Michael Segel 2012-11-07, 16:31
0 Custer didn't run. He got surrounded and then massacred.  :-P (See Custer's last stand at Little Big Horn)

Ok... plain text files 100 files 2 blocks each would by default attempt to schedule 200 mappers.

Is this one of those online Cert questions?

On Nov 7, 2012, at 10:20 AM, Ramasubramanian Narayanan <[EMAIL PROTECTED]> wrote:

> Hi,
>
> If a  Custer’s HDFS block size is 64MB. You have a directory containing 100 plain text files, each of which Is 100MB in size. The InputFormat for your job is TextInputFormat. How many Mappers will run?
>
> regards,
> Rams
>
>
>
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Ramasubramanian Narayanan... 2012-11-07, 16:46
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Michael Segel 2012-11-07, 17:30