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Re: Default Compression - Hadoop - [mail # user]
...Try getting rid of the extra spaces and new lines.  -Joey  On Mon, Oct 31, 2011 at 1:49 PM, Mark  wrote: ors pressionCodecFactory.java:116) odecFactory.java:156) utFormat.java...
   Author: Joey Echeverria, 2011-10-31, 19:52
[expand - 3 more] - Re: cannot find DeprecatedLzoTextInputFormat - Hadoop - [mail # user]
...Hi Jessica,  Sorry for the delay. I don't know of a pre-built version of the LZO libraries that has the fix. I also couldn't quite tell which source versions might have it. The easiest ...
   Author: Joey Echeverria, 2011-10-17, 00:05
Re: setInt & getInt - Hadoop - [mail # user]
...The Job class copies the Configuraiton that you pass in. You either need to do your conf.setInt("number", 12345) before you create the Job object or you need call job.getConfiguration().setI...
   Author: Joey Echeverria, 2011-10-04, 16:31
Re: pointing mapred.local.dir to a ramdisk - Hadoop - [mail # user]
...Raj,  I just tried this on my CHD3u1 VM, and the ramdisk worked the first time. So, it's possible you've hit a bug in CDH3b3 that was later fixed. Can you enable debug logging in log4j....
   Author: Joey Echeverria, 2011-10-03, 18:49
Re: Running multiple MR Job's in sequence - Hadoop - [mail # user]
...I would definitely checkout Oozie for this use case.  -Joey  On Thu, Sep 29, 2011 at 12:51 PM, Aaron Baff  wrot e: d just submitted the Job's in sequence, or if that gave it a...
   Author: Joey Echeverria, 2011-09-29, 17:02
Re: FileSystem closed - Hadoop - [mail # user]
...Do you close your FileSystem instances at all? IIRC, the FileSystem instance you use is a singleton and if you close it once, it's closed for everybody. My guess is you close it in your clea...
   Author: Joey Echeverria, 2011-09-29, 17:02
Re: block size - Hadoop - [mail # user]
...HDFS blocks are stored as files in the underlying filesystem of your datanodes. Those files do not take a fixed amount of space, so if you store 10 MB in a file and you have 128 MB blocks, y...
   Author: Joey Echeverria, 2011-09-21, 02:10
Re: Submitting Jobs from different user to a queue in capacity scheduler - Hadoop - [mail # user]
...As hfuser, create the /user/arun directory in hdfs-user. Then change the ownership /user/arun to arun.  -Joey On Sep 18, 2011 8:07 AM, "ArunKumar"  wrote: http://lucene.472066.n3.n...
   Author: Joey Echeverria, 2011-09-18, 16:00
Re: risks of using Hadoop - Hadoop - [mail # user]
...Losing the name node does not necessarily mean lost data. You should always h ave your name node write its metadata to an NFS server to guard against it. A lso, while unavailability is a ris...
   Author: Joey Echeverria, 2011-09-18, 01:06
Re: Debugging mapper - Hadoop - [mail # user]
...You might also want to look into MRUnit[1]. It lets you mock the behavior of the framework to test your map and reduce classes in isolation. Can't discover all bugs, but a useful tool and wo...
   Author: Joey Echeverria, 2011-09-15, 21:45
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