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Task tracker default-rack error? - Hadoop - [mail # user]
...On one machine, where a pseudo-distributed cluster works properly, the  Machine column for the task tracker lists "/default-rack/[ip.address]"  with actual numbers.  The links...
   Author: Keith Wiley, 2012-02-09, 22:11
Task log URL is broken - Hadoop - [mail # user]
...I have two setups at the moment, one local (pseudo-distributed) on my  Mac and another, also pseudo-distributed, on a single Tier 3 node.  HDFS  works fine, MapReduce runs gre...
   Author: Keith Wiley, 2012-02-08, 22:08
[expand - 1 more] - Re: Tom White's book, 2nd ed. Which API? - Hadoop - [mail # user]
...Thanks everyone.  I knew about the upcoming third edition.  I'm not sure  I want to wait until May to learn the "new" API (pretty old actually).   I'd like to find a reso...
   Author: Keith Wiley, 2012-02-07, 02:28
Any ever run Hadoop on Tier 3? - Hadoop - [mail # user]
...I'm looking for any experience I can benefit from in running Hadoop on  Tier 3?  I'll probably be using Cloudera's CDH3, which provides  Hadoop-0.20.2+923.194.  Would any...
   Author: Keith Wiley, 2012-02-02, 21:36
Can't HDFS from within streaming mapper - Hadoop - [mail # dev]
...My streaming mapper does and HDFS "get" to pull a file to the local  node.  This has worked perfectly on another cluster, but it's timing out  on a new cluster:  Command:...
   Author: Keith Wiley, 2012-01-10, 20:00
[expand - 2 more] - Re: Slow shuffle stage? - Hadoop - [mail # user]
...Oh, so the reported shuffle time incorporate the mapper time.  I suppose  that makes sense since the two stages overlap.  That explains a lot.  As to the map times, it mo...
   Author: Keith Wiley, 2011-11-11, 15:57
Streaming input, data locality - Hadoop - [mail # user]
...I would like my streaming job to receive the names of files stored on  HDFS, but not the actual contents of the files, and I would like data  locality to be honored (I want mappers...
   Author: Keith Wiley, 2011-08-19, 21:46
cmdenv LD_LIBRARY_PATH - Hadoop - [mail # user]
...I know you can do something like this:  -cmdenv LD_LIBRARY_PATH=./my_libs  if you have shared libraries in a subdirectory under the cwd (such as  occurs when using -cacheArchi...
   Author: Keith Wiley, 2011-08-05, 18:37
[expand - 3 more] - Re: streaming cacheArchive shared libraries - Hadoop - [mail # user]
...Right, so it was pushed down a level into the "testlink" directory.   That's why my shared libraries were not linking properly to my mapper  executable.  I can fix that by usi...
   Author: Keith Wiley, 2011-08-05, 17:49
[expand - 1 more] - Re: Upload, then decompress archive on HDFS? - Hadoop - [mail # user]
...I can envision an M/R job for the purpose of manipulating hdfs, such as  (de)compressing files and resaving them back to HDFS.  I just didn't  think it should be necessary to ...
   Author: Keith Wiley, 2011-08-05, 15:14
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