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WebUI issues - MapReduce - [mail # dev]
...Hello  I was trying to build the trunk and run MR2 in pseudo-distributed mode. The jobs run fine, I can see the wordcount output on hdfs. However, the WebUI doesn't reflect the applicat...
   Author: Karthik Kambatla, 2012-07-16, 23:51
[MAPREDUCE-4355] Add RunningJob.getJobStatus() - MapReduce - [issue]
...Usecase: Read the start/end-time of a particular job.Currently, one has to iterate through JobClient.getAllJobStatuses() and iterate through them. JobClient.getJob(JobID) returns RunningJob,...
http://issues.apache.org/jira/browse/MAPREDUCE-4355    Author: Karthik Kambatla, 2012-07-10, 20:26
Re: issue with map running time - MapReduce - [mail # user]
...Manoj,  By running an MR job on many small files, one does incur latency costs of reading individual files. These costs can be addressed to some extent by re-using the JVM across map ta...
   Author: Karthik Kambatla, 2012-07-10, 08:39
Re: Basic question on how reducer works - MapReduce - [mail # user]
...The partitioner is configurable. The default partitioner, from what I remember, computes the partition as the hashcode modulo number of reducers/partitions. For random input, it is balanced,...
   Author: Karthik Kambatla, 2012-07-10, 03:33
Re: - MapReduce - [mail # user]
...Hi Nishan  Let me forward this to the right list -   Thanks Karthik  On Thu, Jul 5, 2012 at 6:43 AM, Nishan Shetty wro te:  ***...
   Author: Karthik Kambatla, 2012-07-05, 16:36
Re: 答复: How To Distribute One Map Data To All Reduce Tasks? - MapReduce - [mail # user]
...One way to achieve this would be to:     1. Emit the same value multiple times, each time with a different key.    2. Use these different keys, in conjunction with the pa...
   Author: Karthik Kambatla, 2012-07-05, 08:10
Re: multiple input splits from single file - MapReduce - [mail # user]
...Hi Sharat  A couple of questions/comments:     1. Is your input graph complete?    2. If it is not complete, it might make sense to use adjacency lists of   &nb...
   Author: Karthik Kambatla, 2012-06-11, 06:54
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