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Re: output/input ratio > 1 for map tasks? - MapReduce - [mail # user]
...On Mon, Jul 30, 2012 at 11:47 AM, brisk  wrote:   The traditional case is building an inverted index of some sort. Your input is the input documents, the shuffle is the set of sear...
   Author: Owen O'Malley, 2012-07-30, 21:57
[MAPREDUCE-318] Refactor reduce shuffle code - MapReduce - [issue]
...The reduce shuffle code has become very complex and entangled. I think we should move it out of ReduceTask and into a separate package (org.apache.hadoop.mapred.task.reduce). Details to foll...
http://issues.apache.org/jira/browse/MAPREDUCE-318    Author: Owen O'Malley, 2012-07-29, 21:55
[MAPREDUCE-463] The job setup and cleanup tasks should be optional - MapReduce - [issue]
...For jobs that require low latency and do not require setup or cleanup tasks for the job, it should be possible to turn them off for that job....
http://issues.apache.org/jira/browse/MAPREDUCE-463    Author: Owen O'Malley, 2012-07-28, 00:36
[MAPREDUCE-445] Web service interface to the JobTracker - MapReduce - [issue]
...I think we need to provide a web services interface to submit and track jobs. This will simplify cross-version and non-Java access to JobTracker functionality....
http://issues.apache.org/jira/browse/MAPREDUCE-445    Author: Owen O'Malley, 2012-07-10, 16:53
[MAPREDUCE-90] incrementing counters should not be used for triggering record skipping - MapReduce - [issue]
...The following code is really problematic:public void incrCounter(String group, String counter, long amount) {  if (counters != null) {    counters.incrCounter(group,...
http://issues.apache.org/jira/browse/MAPREDUCE-90    Author: Owen O'Malley, 2012-07-07, 16:16
[MAPREDUCE-1462] Enable context-specific and stateful serializers in MapReduce - MapReduce - [issue]
...Although the current serializer framework is powerful, within the context of a job it is limited to picking a single serializer for a given class. Additionally, Avro generic serialization ca...
http://issues.apache.org/jira/browse/MAPREDUCE-1462    Author: Owen O'Malley, 2012-07-07, 12:56
[MAPREDUCE-2364] Shouldn't hold lock on rjob while localizing resources. - MapReduce - [issue]
...There is a deadlock while localizing resources on the TaskTracker....
http://issues.apache.org/jira/browse/MAPREDUCE-2364    Author: Owen O'Malley, 2012-04-26, 22:24
[MAPREDUCE-2600] MR-279: simplify the jars - MapReduce - [issue]
...Currently the MR-279 mapreduce project generates 59 jars from 59 source roots, which can be dramatically simplified....
http://issues.apache.org/jira/browse/MAPREDUCE-2600    Author: Owen O'Malley, 2012-04-14, 00:15
[expand - 1 more] - Re: Reduce output is strange - MapReduce - [mail # dev]
...On Tue, Apr 3, 2012 at 8:25 AM, Pedro Costa  wrote:  You use the SequenceFile.Reader class.   You use the SequenceFile.Reader class.   SequenceFile's always have "SEQ" fo...
   Author: Owen O'Malley, 2012-04-03, 15:29
[expand - 1 more] - Re: [RESULT] - [VOTE] Rename hadoop branches post hadoop-1.x - MapReduce - [mail # dev]
...On Wed, Mar 28, 2012 at 12:32 PM, Todd Lipcon  wrote:  But new features also go to trunk. And if none of our new features are  Let's imagine that we already had a 2.0.0 releas...
   Author: Owen O'Malley, 2012-03-28, 19:39
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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