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Re: is there anyway to detect the file size as am i writing a sequence file? - Hadoop - [mail # user]
...I think you mean Writer.getLength(). It returns the current position in the output stream in bytes (more or less the current size of the file).  -Joey  On Tue, Mar 6, 2012 at 9:53 ...
   Author: Joey Echeverria, 2012-03-06, 15:00
Re: LZO exception decompressing (returned -8) - Hadoop - [mail # user]
...I know this doesn't fix lzo, but have you considered Snappy for the intermediate output compression? It gets similar compression ratios and compress/decompress speed, but arguably has better...
   Author: Joey Echeverria, 2012-03-02, 04:15
Re: Adding nodes - Hadoop - [mail # user]
...Not quite. Datanodes get the namenode host from fs.defalt.name in core-site. xml. Task trackers find the job tracker from the mapred.job.tracker setting i n mapred-site.xml.   Sent from...
   Author: Joey Echeverria, 2012-03-02, 00:57
Re: dfs.block.size - Hadoop - [mail # user]
...dfs.block.size can be set per job.  mapred.tasktracker.map.tasks.maximum is per tasktracker.  -Joey  On Mon, Feb 27, 2012 at 10:19 AM, Mohit Anchlia  wrote:    ...
   Author: Joey Echeverria, 2012-02-27, 15:59
Re: Backupnode in 1.0.0? - Hadoop - [mail # user]
...Check out this branch for the 0.22 version of Bigtop:  https://svn.apache.org/repos/asf/incubator/bigtop/branches/hadoop-0.22/  However, I don't think BackupNode is what you want. ...
   Author: Joey Echeverria, 2012-02-23, 01:24
Re: Security at file level in Hadoop - Hadoop - [mail # user]
...HDFS supports POSIX style file and directory permissions (read, write, execu te) for the owner, group and world. You can change the permissions with hado op fs -chmod    -Joey &nbs...
   Author: Joey Echeverria, 2012-02-22, 12:33
Re: Writing small files to one big file in hdfs - Hadoop - [mail # user]
...I'd recommend making a SequenceFile[1] to store each XML file as a value.  -Joey  [1] http://hadoop.apache.org/common/docs/r1.0.0/api/org/apache/hadoop/io/SequenceFile.html  O...
   Author: Joey Echeverria, 2012-02-21, 17:23
Re: Adding mahout math jar to hadoop mapreduce execution - Hadoop - [mail # user]
...The -libjars feature is needed if you use the classes in your remote code (m ap and reduce functions). Is it possible you only use it in your main() meth od?  -Joey  Sent from my i...
   Author: Joey Echeverria, 2012-02-01, 13:50
Re: NameNode per-block memory usage? - Hadoop - [mail # user]
...I don't remember the exact number, it also depends on which version of Hadoop you're using   It's 1 GB for every *million* objects (files, blocks, etc.). This is a good rule of thumb, a...
   Author: Joey Echeverria, 2012-01-17, 15:20
Re: Can you unset a mapred.input.dir configuration value? - Hadoop - [mail # user]
...You can useĀ  FileInptuFormat.setInputPaths(configuration, job1-output). This will overwrite the old input path(s).  -Joey  On Mon, Jan 16, 2012 at 7:16 PM, W.P. McNeill  wrote...
   Author: Joey Echeverria, 2012-01-17, 00:21
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