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comparators with lifecycle - MapReduce - [mail # dev]
...I plan to implement comparators with lifecycle and make them backward  compatible.  plan: create Class LifecycleComparator implements Comparator after new instance of comparator is...
   Author: Radim Kolar, 2012-12-19, 03:04
[MAPREDUCE-4827] Increase hash quality of HashPartitioner - MapReduce - [issue]
...hash partitioner is using object.hashCode() for splitting keys into partitions. This results in bad distributions because hashCode() quality is poor. These hashCode() functions are sometimes...
http://issues.apache.org/jira/browse/MAPREDUCE-4827    Author: Radim Kolar, 2012-12-17, 23:18
Re: How to compile the JobTracker.java - MapReduce - [mail # dev]
...it did not builds in eclipse out of box....
   Author: Radim Kolar, 2012-12-17, 22:55
[expand - 1 more] - Re: One output file per node - MapReduce - [mail # dev]
...if you have strong data locality demands, then try  http://peregrine_mapreduce.bitbucket.org/ Its 2x faster then hadoop for  multipass job types. It has also very fast node recover...
   Author: Radim Kolar, 2012-12-14, 01:03
[MAPREDUCE-4509] Make link in "Aggregation is not enabled. Try the nodemanager at" - MapReduce - [issue]
...if log aggregation is disabled message is displayed Aggregation is not enabled. Try the nodemanager at reavers.com:9006It would be helpfull to make link to nodemanager clickable.This message...
http://issues.apache.org/jira/browse/MAPREDUCE-4509    Author: Radim Kolar, 2012-11-22, 16:36
[MAPREDUCE-4116] Missing POM dependency for hadoop-yarn-common - MapReduce - [issue]
...hadoop-yarn-common is missing dependency on hadoop-common. some things like Configured from it are used. This dependency should be added to POM...
http://issues.apache.org/jira/browse/MAPREDUCE-4116    Author: Radim Kolar, 2012-11-22, 16:29
[MAPREDUCE-4630] API for setting dfs.block.size - MapReduce - [issue]
...Add API for setting block size in Tool while creating MR job.I proposeFileOutputFormat.setBlockSize(Job job, int blocksize);which sets dfs.block.size...
http://issues.apache.org/jira/browse/MAPREDUCE-4630    Author: Radim Kolar, 2012-11-22, 16:22
Re: When speculative execution is true, there is a data loss issue with multpleoutputs - MapReduce - [mail # user]
...its not data loss, problem is caused that multipleoutputs do not work  with standard committer if you do not write into subdirectory of main  job output....
   Author: Radim Kolar, 2012-11-21, 14:31
[expand - 1 more] - Re: QA bot in YARN project - MapReduce - [mail # dev]
...are there any difficulties to setup qa bot to be automatic for YARN project?...
   Author: Radim Kolar, 2012-11-19, 15:54
mapred history server logs - MapReduce - [mail # user]
...Where are aggregated logs used by mapred history server stored? HDFS or  local disk?  I was not able to find them in HDFS...
   Author: Radim Kolar, 2012-10-29, 10:21
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