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Re: Running queries using index on HDFS - Hadoop - [mail # user]
...Sofia,  You can access any HDFS file from a normal java application so long as your  classpath and some configuration is set up correctly.  That is all that th e hadoop jar co...
   Author: Robert Evans, 2011-07-25, 22:00
[expand - 1 more] - Re: Custom FileOutputFormat / RecordWriter - Hadoop - [mail # user]
...Tom,  I also forgot to mention that if you are writing to lots of little files it  could cause issues too.  HDFS is designed to handle relatively few BIG fil es.  There i...
   Author: Robert Evans, 2011-07-25, 20:34
Re: Problem with Hadoop Streaming -file option for Java class files - Hadoop - [mail # user]
...an IdentityMapper being run in streaming.  I don't believe that -mapper wil l understand something.class as a class file that should be loaded and used  as the mapper.  I thin...
   Author: Robert Evans, 2011-07-22, 16:05
Re: [VOTE] Abandon the HDFS proxy contrib component - Hadoop - [mail # general]
...+1 (non binding) I am always in favor of removing dead code.  If anyone eve r does want to look at it or fix it and bring it back in they can go back t o an older version. That is part ...
   Author: Robert Evans, 2011-07-21, 14:02
Re: Giving filename as key to mapper ? - Hadoop - [mail # user]
...To add to that if you really want the file name to be the key instead of ju st calling a different API in your map to get it you will probably need to  write your own input format to do...
   Author: Robert Evans, 2011-07-15, 14:37
Re: Which release to use? - Hadoop - [mail # user]
...Adarsh,  Yahoo! no longer has its own distribution of Hadoop.  It has been merged in to the 0.20.2XX line so 0.20.203 is what Yahoo is running internally right  now, and we ar...
   Author: Robert Evans, 2011-07-15, 14:35
Re: large data and hbase - Hadoop - [mail # user]
...Rita,  My understanding is that you do not need to setup map/reduce to use Hbase,  but I am not an expert on it.  Contacting the Hbase mailing list would prob ably be the best...
   Author: Robert Evans, 2011-07-11, 14:54
Re: Cluster Tuning - Hadoop - [mail # user]
...I doubt It is going to make that much of a difference, even with the hardwa re constraints.  All that the reduce is doing during this period of time is  downloading the map output ...
   Author: Robert Evans, 2011-07-08, 16:11
Re: Can i safely set dfs.blockreport.intervalMsec to very large value (1 year or more?) - Hadoop - [mail # user]
...Moon Soo Lee  The full block report is used in error cases.  Currently when a datanode he artbeats into the namenode the namenode can send back a list of tasks to be  preforme...
   Author: Robert Evans, 2011-07-08, 14:21
[expand - 1 more] - Re: HADOOP-7106 (project unsplit) this weekend - Hadoop - [mail # general]
...Todd,  It seems to be working now, so whatever it was it is now gone.   On 6/13/11 9:57 AM, "Todd Lipcon"  wrote:  Hmm, as I got farther down my email this morning, I saw...
   Author: Robert Evans, 2011-06-13, 15:10
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