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Re: Multiple Aggregate functions in map reduce program - MapReduce - [mail # user]
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...I guess one important question is what do you mean by 'it takes time'. And what goal do you want to reach. It may be that your current implementation is naive and can be improved (which begs...
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Author: Bertrand Dechoux,
2012-10-05, 08:13
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Re: Cumulative value using mapreduce - MapReduce - [mail # user]
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...Hi, The provided example records are perfect. With that I doubt there will be any confusion about what kind of data is available and it should be manipulated. However, "the output is n...
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Author: Bertrand Dechoux,
2012-10-05, 06:38
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Re: Cumulative value using mapreduce - MapReduce - [mail # user]
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...I indeed didn't catch the cumulative sum part. Then I guess it begs for what-is-often-called-a-secondary-sort, if you want to compute different cumulative sums during the same job. It can be...
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Author: Bertrand Dechoux,
2012-10-04, 21:21
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Re: Cumulative value using mapreduce - MapReduce - [mail # user]
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...Hi, It sounds like a 1) group information by account 2) compute sum per account If that not the case, you should precise a bit more about your context. This computing looks...
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Author: Bertrand Dechoux,
2012-10-04, 16:20
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Re: What's the basic idea of pseudo-distributed Hadoop ? - MapReduce - [mail # user]
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...The only difference between pseudo-distributed and fully distributed would be scale. You could say that code that runs fine on the former, runs fine too on the latter. But it does not necess...
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Author: Bertrand Dechoux,
2012-09-14, 07:31
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Re: Configuration of hadoop.job.history.user.location on a user basis - MapReduce - [mail # user]
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...Hi Hemanth, I thought of that but I didn't test it because I need the same for the job id. Of course, I could generate my own id but I don't like that solution. I will look at hadoop.t...
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Author: Bertrand Dechoux,
2012-09-14, 05:38
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Configuration of hadoop.job.history.user.location on a user basis - MapReduce - [mail # user]
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...Hi, I would like to be able to fully isolate the quota of each user. That is, I would like to put everything related to a user into her/his home directory /user/. Among other poi...
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Author: Bertrand Dechoux,
2012-09-13, 12:16
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Expected behavior of nested UserGroupInformation - MapReduce - [mail # user]
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...Hi, I am using UserGroupInformation.doAs(...) in order to launch a job programmatically from a remote application. I was wondering : what is the expected behavior of nested UserGroupIn...
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Author: Bertrand Dechoux,
2012-09-12, 10:28
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Re: How get information messages when a JobControl is used ? - MapReduce - [mail # user]
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...But as far as I know there is no way to have a snapshot of the JobControl state. https://issues.apache.org/jira/browse/MAPREDUCE-3562 I was trying only to get the state of all jobs and...
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Author: Bertrand Dechoux,
2012-09-12, 10:21
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Re: New Learner for Haddop and Hive - MapReduce - [mail # user]
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...1) First do not post across multiple mailing list. I am replying to all in order to share my answer but you should then reply only on the mailing list which is concerned with your issue. 2) ...
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Author: Bertrand Dechoux,
2012-09-05, 09:37
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