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Re: Distributed cluster filesystem on EC2 - Hadoop - [mail # user]
...Dmitry,  It sounds like an interesting idea, but I have not really heard of anyone d oing it before.  It would make for a good feature to have tiered file syste ms all mapped into ...
   Author: Robert Evans, 2011-08-31, 15:22
Re: ERROR building latest trunk for Hadoop project - Hadoop - [mail # dev]
...I ran into the same error with mvn compile.  There are some issues with dep endency resolution in mvn and you need to run  mvn test -DskipTests  To compile the code.   &n...
   Author: Robert Evans, 2011-08-31, 14:47
Re: Question about invoking an executable from Hadoop mapper - Hadoop - [mail # dev]
...I think this is a java issue.  I don't think that it is launching a shell t o run your command.  I think it is just splitting on white space and then p assing all the args to hadoo...
   Author: Robert Evans, 2011-08-25, 16:32
Re: how to pass a hdfs file to a c++ process - Hadoop - [mail # dev]
...Hadoop streaming is the simplest way to do this, if you program is set up t o take stdin as its input, write to stdout for the output, and each record  "file" in your case is a single l...
   Author: Robert Evans, 2011-08-23, 14:48
Re: AW: Hadoop Case Studies with interactive applications...an antagonism? - Hadoop - [mail # general]
...Christian,  I am really not an expert on Hive, but from what I know Hive translates the  SQL into 1 or more Map/Reduce jobs to execute the query.  It does optimiza tions to tr...
   Author: Robert Evans, 2011-08-19, 19:28
Re: Hadoop JVM Size (Not MapReduce) - Hadoop - [mail # user]
...The hadoop command is just a shell script that sets up the class path befor e call java.  I think if you set the ENV HADOOP_JAVA_OPTS then they will sh ow up on the command line, but yo...
   Author: Robert Evans, 2011-08-19, 15:48
Re: Hadoop Case Studies with interactive applications...an antagonism? - Hadoop - [mail # general]
...Christian,  Hadoop is best for batch processing because it is optimized for that use ca se.  It is not that it cannot handle small jobs.  Those jobs tend to be som e what slow...
   Author: Robert Evans, 2011-08-19, 15:35
Re: getting started building Mavenized hadoop common - Hadoop - [mail # general]
...Can we make it a separate maven project.  Not a separate tar but something  closer to the hadoop-annotations.  That way if nothing has changed or the d eveloper does not have ...
   Author: Robert Evans, 2011-08-04, 13:33
[expand - 4 more] - Re: Hadoop-streaming using binary executable c program - Hadoop - [mail # user]
...What I usually do to debug streaming is to print things to STDERR.  STDERR  shows up in the logs for the attempt and you should be able to see better w hat is happening.  I am...
   Author: Robert Evans, 2011-08-02, 13:35
Re: next gen map reduce - Hadoop - [mail # user]
...It has not been introduced yet.  If you are referring to MRV2.  It is targe ted to go into the 0.23 release of Hadoop, but is currently on the MR-279 b ranch.  Which should ho...
   Author: Robert Evans, 2011-07-28, 13:39
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