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Posted to general@hadoop.apache.org by Nitin Khandelwal <ni...@gmail.com> on 2012/09/26 18:38:51 UTC
Amateur doubt about Terasort
HI,
I was trying to understand TeraSort code, but didn't find any
Mapper/Reducer. On googling came to know that its not needed (Hadoop does
sort on default). But I am not very clear about how it works. Can anyone
please brief me about how terasort works or any link that has document on
the same.
Thanks in advance,
Nitin
Re: Amateur doubt about Terasort
Posted by Harsh J <ha...@cloudera.com>.
Please do not mail general@ with user/dev questions. Use the user@
alias for it in future.
The IdentityMapper and IdentityReducer is what TeraSort uses ("it is
not needed/hadoop does sort on default" -> uses default
mapper/reducer).
On Wed, Sep 26, 2012 at 10:08 PM, Nitin Khandelwal <ni...@gmail.com> wrote:
> HI,
>
> I was trying to understand TeraSort code, but didn't find any
> Mapper/Reducer. On googling came to know that its not needed (Hadoop does
> sort on default). But I am not very clear about how it works. Can anyone
> please brief me about how terasort works or any link that has document on
> the same.
>
> Thanks in advance,
> Nitin
--
Harsh J
Re: Amateur doubt about Terasort
Posted by Harsh J <ha...@cloudera.com>.
Please do not mail general@ with user/dev questions. Use the user@
alias for it in future.
The IdentityMapper and IdentityReducer is what TeraSort uses ("it is
not needed/hadoop does sort on default" -> uses default
mapper/reducer).
On Wed, Sep 26, 2012 at 10:08 PM, Nitin Khandelwal <ni...@gmail.com> wrote:
> HI,
>
> I was trying to understand TeraSort code, but didn't find any
> Mapper/Reducer. On googling came to know that its not needed (Hadoop does
> sort on default). But I am not very clear about how it works. Can anyone
> please brief me about how terasort works or any link that has document on
> the same.
>
> Thanks in advance,
> Nitin
--
Harsh J
Re: Amateur doubt about Terasort
Posted by Harsh J <ha...@cloudera.com>.
Please do not mail general@ with user/dev questions. Use the user@
alias for it in future.
The IdentityMapper and IdentityReducer is what TeraSort uses ("it is
not needed/hadoop does sort on default" -> uses default
mapper/reducer).
On Wed, Sep 26, 2012 at 10:08 PM, Nitin Khandelwal <ni...@gmail.com> wrote:
> HI,
>
> I was trying to understand TeraSort code, but didn't find any
> Mapper/Reducer. On googling came to know that its not needed (Hadoop does
> sort on default). But I am not very clear about how it works. Can anyone
> please brief me about how terasort works or any link that has document on
> the same.
>
> Thanks in advance,
> Nitin
--
Harsh J
Re: Amateur doubt about Terasort
Posted by Harsh J <ha...@cloudera.com>.
Please do not mail general@ with user/dev questions. Use the user@
alias for it in future.
The IdentityMapper and IdentityReducer is what TeraSort uses ("it is
not needed/hadoop does sort on default" -> uses default
mapper/reducer).
On Wed, Sep 26, 2012 at 10:08 PM, Nitin Khandelwal <ni...@gmail.com> wrote:
> HI,
>
> I was trying to understand TeraSort code, but didn't find any
> Mapper/Reducer. On googling came to know that its not needed (Hadoop does
> sort on default). But I am not very clear about how it works. Can anyone
> please brief me about how terasort works or any link that has document on
> the same.
>
> Thanks in advance,
> Nitin
--
Harsh J