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Re: Performance of direct vs indirect shuffling - MapReduce - [mail # user]
... Have someone ever considered a general data transfer service bundled with YARN? So other applications(rather than MR) can also benefits from it. The data transfer service looks like re...
   Author: Binglin Chang, 2011-12-21, 06:07
[MAPREDUCE-3246] Make Task extensible to support modifications of Task or even alternate programming paradigms - MapReduce - [issue]
...One of MRv2's goal is to support alternate programming paradigms, but building a application using YARN from the bottom is not trivial. In fact most component of MapReduce can be reused, mos...
http://issues.apache.org/jira/browse/MAPREDUCE-3246    Author: Binglin Chang, 2011-11-27, 14:37
[MAPREDUCE-2541] Race Condition in IndexCache(readIndexFileToCache,removeMap) causes value of totalMemoryUsed corrupt, which may cause TaskTracker continue throw Exception - MapReduce - [issue]
...The race condition goes like this:Thread1: readIndexFileToCache()  totalMemoryUsed.addAndGet(newInd.getSize())Thread2: removeMap() totalMemoryUsed.addAndGet(-info.getSize());When SpillR...
http://issues.apache.org/jira/browse/MAPREDUCE-2541    Author: Binglin Chang, 2011-11-15, 00:48
[MAPREDUCE-3383] Duplicate job.getOutputValueGroupingComparator() in ReduceTask - MapReduce - [issue]
...This is probably just a small error by mistake....
http://issues.apache.org/jira/browse/MAPREDUCE-3383    Author: Binglin Chang, 2011-11-09, 08:11
[MAPREDUCE-2910] Allow empty MapOutputFile segments - MapReduce - [issue]
...As the scale of cluster and job get larger, we see a lot of empty partitions in MapOutputFile due to large reduce numbers or partition skew. When map output compression is enabled, empty map...
http://issues.apache.org/jira/browse/MAPREDUCE-2910    Author: Binglin Chang, 2011-10-31, 04:57
[MAPREDUCE-2872] Optimize TaskTracker memory usage - MapReduce - [issue]
...We observe high memory usage of framework level components on slave node, mainly TaskTracker & Child, especially for large clusters. To be clear at first, large jobs with 10000-100000 ma...
http://issues.apache.org/jira/browse/MAPREDUCE-2872    Author: Binglin Chang, 2011-08-30, 08:46
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB