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MapReduce >> mail # user >> what is the difference between the two packages "org.apache.hadoop.mapreduce" and "org.apache.hadoop.mapred"?


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Re: what is the difference between the two packages "org.apache.hadoop.mapreduce"and "org.apache.hadoop.mapred"?
El 4/26/2011 12:12 PM, Wantao escribió:
> "org.apache.hadoop.mapred" is the package for old API and
> "org.apache.hadoop.mapreduce" is the package for new API. Although the
> two APIs have similar functionality, the implementation is different.
> Hadoop is migrating from the old API to the new API.
>
> Wantao
> ------------------ Original ------------------
> *From: * "吕鹏"<[EMAIL PROTECTED]>;
> *Date: * Tue, Apr 26, 2011 08:17 PM
> *To: * "mapreduce-user"<[EMAIL PROTECTED]>;
> *Subject: * what is the difference between the two packages
> "org.apache.hadoop.mapreduce"and "org.apache.hadoop.mapred"?
> hi
> when i read the source of mapred, i find there're a lot of classes
> with the same names between "org.apache.hadoop.mapreduce" and
> "org.apache.hadoop.mapred", such as
> "org.apache.hadoop.mapreduce.Counters" and
> "org.apache.hadoop.mapred.Counters", why does this happen? why not
> define only one Counters instead? what is the difference between the
> two packages "org.apache.hadoop.mapreduce" and "org.apache.hadoop.mapred"?
>
> thx
>
>
> Lv Peng
The MapReduce ´s next generation is been implemented on the new API?
Regards

--
Marcos Luís Ortíz Valmaseda
  Software Engineer (Large-Scaled Distributed Systems)
  University of Information Sciences,
  La Habana, Cuba
  Linux User # 418229
  http://about.me/marcosortiz