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Re: MR job scheduler - Hadoop - [mail # user]
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...Arun iam not talkin about the map phase . Iam talking abt the reduce phase which starts after the map gets finished The Key "K" iam referring to in my example is one of the...
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Author: bharath vissapragada,
2009-08-21, 06:33
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Re: MR job scheduler - Hadoop - [mail # user]
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...Amogh i think Reduce phase starts only when all the map phases are completed . Because it needs all the values corresponding to a particular key! 2009/8/21 Amogh Vasekar e...
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Author: bharath vissapragada,
2009-08-21, 06:29
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Re: MR job scheduler - Hadoop - [mail # user]
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...OK i'll be a bit more specific , Suppose map outputs 100 different keys . Consider a key "K" whose correspoding values may be on N diff datanodes. Consider a datanode "D" which h...
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Author: bharath vissapragada,
2009-08-21, 04:20
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MR job scheduler - Hadoop - [mail # user]
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...Hi all, Can anyone tell me how the MR scheduler schedule the MR jobs? How does it decide where t create MAP tasks and how many to create. Once the MAP tasks are over how does it decide...
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Author: bharath vissapragada,
2009-08-20, 15:58
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Re: changing logging - Hadoop - [mail # user]
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...Print Statements worked out in my case ,,, Dunno whether that approach is right or not .. but it works fine .. On Fri, Aug 7, 2009 at 9:40 PM, John Clarke wrote: ...
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Author: bharath vissapragada,
2009-08-08, 02:03
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Re: namenode -upgrade problem - Hadoop - [mail # user]
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...yes .. I have stopped all the daemons ... when i use jps ...i get only ... " Jps" Actually .. i upgraded the version from 18.2 to 19.x on the same path of hdfs .. is it a problem...
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Author: bharath vissapragada,
2009-08-05, 17:53
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Re: namenode -upgrade problem - Hadoop - [mail # user]
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...Todd thanks for replying .. I stopped the cluster and issued the command "bin/hadoop namenode -upgrade" and iam getting this exception 09/08/04 07:52:39 ERROR namenode.Name...
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Author: bharath vissapragada,
2009-08-04, 02:26
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namenode -upgrade problem - Hadoop - [mail # user]
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...Hi all , I have noticed some problem in my cluster when i changed the hadoop version on the same DFS directory .. The namenode log on the master says the following .. ile system...
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Author: bharath vissapragada,
2009-08-03, 19:08
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Re: combine two map tasks - Hadoop - [mail # user]
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...See this .. hope this answers your question . http://developer.yahoo.com/hadoop/tutorial/module4.html#tips On Sun, Jun 28, 2009 at 5:28 PM, bonito wrote: ...
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Author: bharath vissapragada,
2009-06-28, 12:04
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Re: UnknownHostException - Hadoop - [mail # user]
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...namenode is stopping automatically!! On Tue, Jun 23, 2009 at 10:29 PM, bharath vissapragada wrote: ...
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Author: bharath vissapragada,
2009-06-23, 17:01
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