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Re: Read After Write Consistency in HDFS - MapReduce - [mail # user]
...One possibility, due to the asynchronous nature of your loader, was that the consumer job started before all files from loader were written (propagated) completely.  Can you describe wh...
   Author: Ted Yu, 2010-09-02, 18:45
Re: Is continuous map reduce supported - MapReduce - [mail # user]
...Try this: http://hadoop.apache.org/common/docs/r0.20.0/api/org/apache/hadoop/mapred/lib/ChainReducer.html  On Wed, Sep 1, 2010 at 8:33 PM, Lance Norskog  wrote:  ...
   Author: Ted Yu, 2010-09-02, 03:48
Re: How to debug ReduceTask? - MapReduce - [mail # user]
...Have you tried http://www.karmasphere.com/ ?  On Sat, Aug 28, 2010 at 6:24 PM, Pedro Costa  wrote:  ...
   Author: Ted Yu, 2010-08-29, 03:40
Obtaining active TaskTrackers - MapReduce - [mail # dev]
...Hi, How can I obtain the list of active TaskTrackers programmatically ? I looked at machines.jsp which uses a reference to JobTracker  How do I obtain JobTracker reference from client ?...
   Author: Ted Yu, 2010-08-23, 16:02
[expand - 1 more] - Re: Null mapper? - MapReduce - [mail # user]
...You're right. You need to specify a mapper.  On Mon, Aug 16, 2010 at 3:21 PM, David Rosenstrauch wrote:  ...
   Author: Ted Yu, 2010-08-16, 22:23
[expand - 1 more] - Re: How to work around MAPREDUCE-1700 - MapReduce - [mail # user]
...Hopefully Cloudera will make a build for your needs. Before that happens, you can produce your own installation.  We do this to produce HBase 0.20.6 + HBASE-2473  Cheers  On T...
   Author: Ted Yu, 2010-08-12, 23:33
[expand - 1 more] - Re: MAPREDUCE-1888 - MapReduce - [mail # dev]
...Thanks for your response. We use cdh3b2 which contains HADOOP-1722  On Thu, Aug 5, 2010 at 9:33 PM, Amareshwari Sri Ramadasu  wrote:  ...
   Author: Ted Yu, 2010-08-09, 03:14
Re: [jira] Created: (MAPREDUCE-1973) Optimize input split creation - MapReduce - [mail # dev]
...I applied the patch on cdh3b2. ant test gave me:    [junit] Running org.apache.hadoop.mrunit.types.TestPair     [junit] Tests run: 20, Failures: 0, Errors: 0, Time elapse...
   Author: Ted Yu, 2010-07-28, 23:05
Re: block errors - MapReduce - [mail # user]
...Check the datanode log on 10.15.46.73   You should increase dfs.datanode.max.xcievers  On Tue, Jul 13, 2010 at 3:57 AM, Some Body  wrote:  ...
   Author: Ted Yu, 2010-07-24, 13:51
[MAPREDUCE-1956] allow reducer to initialize lazily - MapReduce - [issue]
...From http://www.scribd.com/doc/23046928/Hadoop-Performance-Tuning:"In M/R job Reducers are initialized with Mappers at the job initialization, but the reduce method is called in reduce phase...
http://issues.apache.org/jira/browse/MAPREDUCE-1956    Author: Ted Yu, 2010-07-21, 22:24
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