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Re: reduce output compression of Terasort - MapReduce - [mail # user]
...As far as I know, TeraOutputFormat don't support compression  On Fri, Feb 17, 2012 at 6:16 PM,  wrote:  he *)....
   Author: Binglin Chang, 2012-02-17, 12:05
[MAPREDUCE-3397] Support no sort dataflow in map output and reduce merge phrase - MapReduce - [issue]
...In our experience, many data aggregation style queries/jobs don't need to sort the intermediate data. In fact reducer side can use hashmap or even array to do application level aggregations....
http://issues.apache.org/jira/browse/MAPREDUCE-3397    Author: Binglin Chang, 2012-01-12, 17:56
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-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