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Re: Trying to setup Cluster - Hadoop - [mail # user]
...Are you encountering specific problems?  I don't think that hadoop's config files will evaluate environment variables. So $HADOOP_HOME won't be interpreted correctly.  For password...
   Author: Aaron Kimball, 2009-06-18, 20:32
Re: HDFS is not loading evenly across all nodes. - Hadoop - [mail # user]
...As an addendum, running a DataNode on the same machine as a NameNode is generally considered a bad idea because it hurts the NameNode's ability to maintain high throughput.  - Aaron &nb...
   Author: Aaron Kimball, 2009-06-18, 20:27
Re: Debugging Map-Reduce programs - Hadoop - [mail # user]
...On Mon, Jun 15, 2009 at 10:01 AM, bharath vissapragada  wrote:    Yes. In distributed mode, each task will write its stdout/stderr to files which you can access through the we...
   Author: Aaron Kimball, 2009-06-15, 22:20
Re: how to transfer data from one reduce to another map - Hadoop - [mail # user]
...You can add multiple paths to the same job -- FileInputFormat.addInputPath() can be called multiple times.  - Aaron  On Mon, Jun 15, 2009 at 6:56 AM, bharath vissapragada  wro...
   Author: Aaron Kimball, 2009-06-15, 16:10
Re: Could I collect results from Map-Reduce then output myself ? - Hadoop - [mail # user]
...If you can make the decision locally, then it should just be performed in the reducer itself:  if (guard) {   output.collect(k, v); }   If you need to know what results will b...
   Author: Aaron Kimball, 2009-06-15, 16:08
Re: Large size Text file split - Hadoop - [mail # user]
...A FileSplit is merely a description of the boundaries. e.g., "bytes 0 to 9999" and "bytes 10000 to 19999". The Mapper then interprets the boundaries described by a FileSplit in a way that ma...
   Author: Aaron Kimball, 2009-06-11, 07:12
Re: Hadoop benchmarking - Hadoop - [mail # user]
...Hi Stephen,  That will set the maximum heap allowable, but doesn't tell Hadoop's internal systems necessarily to take advantage of it. There's a number of other settings that adjust per...
   Author: Aaron Kimball, 2009-06-10, 16:13
Re: Help - ClassNotFoundException from tasktrackers - Hadoop - [mail # user]
...mapred.local.dir can definitely work with multiple paths, but it's a bit strict about the format. You should have one or more paths, separated by commas and no whitespace. e.g. "/disk1/mapre...
   Author: Aaron Kimball, 2009-06-10, 16:09
Re: Hadoop scheduling question - Hadoop - [mail # user]
...Hi Kristi :)  JobControl, as I understand it, runs on the client's machine and sends Job objects to the JobTracker when their dependencies are all met. So once the dependencies are met,...
   Author: Aaron Kimball, 2009-06-05, 21:33
Re: Subscription - Hadoop - [mail # user]
...You need to send a message to [EMAIL PROTECTED] from the address you want registered. See http://hadoop.apache.org/core/mailing_lists.html  - Aaron  On Thu, Jun 4, 2009 at 12:10 PM...
   Author: Aaron Kimball, 2009-06-04, 19:46
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