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Re: Basic Doubt in Hadoop - MapReduce - [mail # user]
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...You are correct, map outputs are stored in LFS not in HDFS. Regards Bejoy KS Sent from remote device, Please excuse typos From: Ramesh R Nair Date: Wed, 17 Apr ...
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Author: bejoy.hadoop@...,
2013-04-17, 07:55
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Re: How to balance reduce job - MapReduce - [mail # user]
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...Uniform Data distribution across HDFS is one of the factor that ensures map tasks are uniformly distributed across nodes. But reduce tasks doesn't depend on data distribution it is purely ba...
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Author: bejoy.hadoop@...,
2013-04-17, 05:38
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Re: How to balance reduce job - MapReduce - [mail # user]
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...Hi Rauljin Few things to check here. What is the number of reduce slots in each Task Tracker? What is the number of reduce tasks for your job? Based on the availability of slots ...
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Author: bejoy.hadoop@...,
2013-04-17, 05:09
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Re: How to configure mapreduce archive size? - MapReduce - [mail # user]
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...You can get your Job.xml for each jobs from The JT web UI. Click on the job, on the specific job page you'll get this. Regards Bejoy KS Sent from remote device, Please excu...
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Author: bejoy.hadoop@...,
2013-04-16, 18:05
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Re: VM reuse! - MapReduce - [mail # user]
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...Hi Rahul AFAIK there is no guarantee that 1 task would be on N1 and another on N2. Both can be on N1 as well. JT has no notion of JVM reuse. It doesn't consider that for task sch...
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Author: bejoy.hadoop@...,
2013-04-16, 16:45
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Re: Newbie Debuggin Question - MapReduce - [mail # user]
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...Hi Sai The location you are seeing should be the mapred.local.dir . From my understanding the files in distributed cache would be available in that location while you are runnin...
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Author: bejoy.hadoop@...,
2013-02-21, 14:05
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Re: Submitting MapReduce job from remote server using JobClient - MapReduce - [mail # user]
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...Hi Amit, Apart for the hadoop jars, Do you have the same config files ($HADOOP_HOME/conf) that are in the cluster on your analytics server as well? If you are having the default ...
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Author: bejoy.hadoop@...,
2013-01-24, 19:49
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Re: Where do/should .jar files live? - MapReduce - [mail # user]
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...Hi Chris In larger clusters it is better to have an edge/client node where all the user jars reside and you trigger your MR jobs from here. A client/edge node is a server with ha...
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Author: bejoy.hadoop@...,
2013-01-23, 02:54
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Re: modifying existing wordcount example - MapReduce - [mail # user]
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...Hi Jamal You can use Distributed Cache only if the file to be distributed is small. Mapreduce should be dealing with larger datasets so you should expect the output file to get larger....
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Author: bejoy.hadoop@...,
2013-01-17, 03:30
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Re: Reg: No space left on device Exception - MapReduce - [mail # user]
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...Hi Manoj Go to the JT web UI, browse to the failed tasks. Identify which task threw the space related error. Ssh to that node and check the disk space on that node. Some partitions mig...
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Author: bejoy.hadoop@...,
2012-12-07, 15:37
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