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Posted to hdfs-user@hadoop.apache.org by unmesha sreeveni <un...@gmail.com> on 2014/01/06 06:12:53 UTC
Need idea for mapreduce
Given a csv file with numeric data.
Need to find maximum element of each column.
What will the map and reduce.
a Guess: pass each column to map()
Find max in Reduce()
--
*Thanks & Regards*
Unmesha Sreeveni U.B
Junior Developer
http://www.unmeshasreeveni.blogspot.in/
Re: Need idea for mapreduce
Posted by unmesha sreeveni <un...@gmail.com>.
Sure i will try and see Harsh :)
On Mon, Jan 6, 2014 at 12:40 PM, Harsh J <ha...@cloudera.com> wrote:
> You seem to have it right - why not give it a try before asking? :)
>
> On Mon, Jan 6, 2014 at 10:42 AM, unmesha sreeveni <un...@gmail.com>
> wrote:
> > Given a csv file with numeric data.
> > Need to find maximum element of each column.
> > What will the map and reduce.
> >
> > a Guess: pass each column to map()
> > Find max in Reduce()
> >
> > --
> > Thanks & Regards
> >
> > Unmesha Sreeveni U.B
> > Junior Developer
> >
> > http://www.unmeshasreeveni.blogspot.in/
> >
> >
>
>
>
> --
> Harsh J
>
--
*Thanks & Regards*
Unmesha Sreeveni U.B
Junior Developer
http://www.unmeshasreeveni.blogspot.in/
Re: Need idea for mapreduce
Posted by unmesha sreeveni <un...@gmail.com>.
Sure i will try and see Harsh :)
On Mon, Jan 6, 2014 at 12:40 PM, Harsh J <ha...@cloudera.com> wrote:
> You seem to have it right - why not give it a try before asking? :)
>
> On Mon, Jan 6, 2014 at 10:42 AM, unmesha sreeveni <un...@gmail.com>
> wrote:
> > Given a csv file with numeric data.
> > Need to find maximum element of each column.
> > What will the map and reduce.
> >
> > a Guess: pass each column to map()
> > Find max in Reduce()
> >
> > --
> > Thanks & Regards
> >
> > Unmesha Sreeveni U.B
> > Junior Developer
> >
> > http://www.unmeshasreeveni.blogspot.in/
> >
> >
>
>
>
> --
> Harsh J
>
--
*Thanks & Regards*
Unmesha Sreeveni U.B
Junior Developer
http://www.unmeshasreeveni.blogspot.in/
Re: Need idea for mapreduce
Posted by unmesha sreeveni <un...@gmail.com>.
Sure i will try and see Harsh :)
On Mon, Jan 6, 2014 at 12:40 PM, Harsh J <ha...@cloudera.com> wrote:
> You seem to have it right - why not give it a try before asking? :)
>
> On Mon, Jan 6, 2014 at 10:42 AM, unmesha sreeveni <un...@gmail.com>
> wrote:
> > Given a csv file with numeric data.
> > Need to find maximum element of each column.
> > What will the map and reduce.
> >
> > a Guess: pass each column to map()
> > Find max in Reduce()
> >
> > --
> > Thanks & Regards
> >
> > Unmesha Sreeveni U.B
> > Junior Developer
> >
> > http://www.unmeshasreeveni.blogspot.in/
> >
> >
>
>
>
> --
> Harsh J
>
--
*Thanks & Regards*
Unmesha Sreeveni U.B
Junior Developer
http://www.unmeshasreeveni.blogspot.in/
Re: Need idea for mapreduce
Posted by unmesha sreeveni <un...@gmail.com>.
Sure i will try and see Harsh :)
On Mon, Jan 6, 2014 at 12:40 PM, Harsh J <ha...@cloudera.com> wrote:
> You seem to have it right - why not give it a try before asking? :)
>
> On Mon, Jan 6, 2014 at 10:42 AM, unmesha sreeveni <un...@gmail.com>
> wrote:
> > Given a csv file with numeric data.
> > Need to find maximum element of each column.
> > What will the map and reduce.
> >
> > a Guess: pass each column to map()
> > Find max in Reduce()
> >
> > --
> > Thanks & Regards
> >
> > Unmesha Sreeveni U.B
> > Junior Developer
> >
> > http://www.unmeshasreeveni.blogspot.in/
> >
> >
>
>
>
> --
> Harsh J
>
--
*Thanks & Regards*
Unmesha Sreeveni U.B
Junior Developer
http://www.unmeshasreeveni.blogspot.in/
Re: Need idea for mapreduce
Posted by Harsh J <ha...@cloudera.com>.
You seem to have it right - why not give it a try before asking? :)
On Mon, Jan 6, 2014 at 10:42 AM, unmesha sreeveni <un...@gmail.com> wrote:
> Given a csv file with numeric data.
> Need to find maximum element of each column.
> What will the map and reduce.
>
> a Guess: pass each column to map()
> Find max in Reduce()
>
> --
> Thanks & Regards
>
> Unmesha Sreeveni U.B
> Junior Developer
>
> http://www.unmeshasreeveni.blogspot.in/
>
>
--
Harsh J
Re: Need idea for mapreduce
Posted by Harsh J <ha...@cloudera.com>.
You seem to have it right - why not give it a try before asking? :)
On Mon, Jan 6, 2014 at 10:42 AM, unmesha sreeveni <un...@gmail.com> wrote:
> Given a csv file with numeric data.
> Need to find maximum element of each column.
> What will the map and reduce.
>
> a Guess: pass each column to map()
> Find max in Reduce()
>
> --
> Thanks & Regards
>
> Unmesha Sreeveni U.B
> Junior Developer
>
> http://www.unmeshasreeveni.blogspot.in/
>
>
--
Harsh J
Re: Need idea for mapreduce
Posted by Harsh J <ha...@cloudera.com>.
You seem to have it right - why not give it a try before asking? :)
On Mon, Jan 6, 2014 at 10:42 AM, unmesha sreeveni <un...@gmail.com> wrote:
> Given a csv file with numeric data.
> Need to find maximum element of each column.
> What will the map and reduce.
>
> a Guess: pass each column to map()
> Find max in Reduce()
>
> --
> Thanks & Regards
>
> Unmesha Sreeveni U.B
> Junior Developer
>
> http://www.unmeshasreeveni.blogspot.in/
>
>
--
Harsh J
Re: Need idea for mapreduce
Posted by Harsh J <ha...@cloudera.com>.
You seem to have it right - why not give it a try before asking? :)
On Mon, Jan 6, 2014 at 10:42 AM, unmesha sreeveni <un...@gmail.com> wrote:
> Given a csv file with numeric data.
> Need to find maximum element of each column.
> What will the map and reduce.
>
> a Guess: pass each column to map()
> Find max in Reduce()
>
> --
> Thanks & Regards
>
> Unmesha Sreeveni U.B
> Junior Developer
>
> http://www.unmeshasreeveni.blogspot.in/
>
>
--
Harsh J