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HDFS block storage - Hadoop - [mail # user]
...I was looking at the HDFS block storage and noticed a couple things (1) all block files are in a flat directory structure (2) there is a "meta" file for each block file.  This leads me ...
   Author: John Lilley, 2013-07-15, 18:23
RE: Requesting containers on a specific host - Hadoop - [mail # user]
...Arun, I'm don't know how to interpret the release schedule from the JIRA.  It says that the patch targets 2.1.0 and it is checked into the trunk, does that mean it is likely to be rolle...
   Author: John Lilley, 2013-07-04, 21:43
temporary folders for YARN tasks - Hadoop - [mail # user]
...When a YARN app and its tasks wants to write temporary files, how does it know where to write the files? I am assuming that each task has some temporary space available, and I hope it is ava...
   Author: John Lilley, 2013-07-01, 20:37
[expand - 1 more] - RE: built hadoop! please help with next steps? - Hadoop - [mail # user]
...I am getting errors trying to install m2e… has anyone else encountered this? Cannot complete the install because one or more required items could not be found.   Software being installe...
   Author: John Lilley, 2013-06-03, 23:49
RE: HDFS interfaces - Hadoop - [mail # user]
...Mahmood,  It is the in the FileSystem interface. http://hadoop.apache.org/docs/current/api/org/apache/hadoop/fs/FileSystem.html#getFileBlockLocations(org.apache.hadoop.fs.Path, long, lo...
   Author: John Lilley, 2013-06-03, 22:58
RE: How to start developing! - Hadoop - [mail # user]
...I had asked a similar question recently:  First, follow the instructions in BUILDING.txt.  It is a bit tedious, but if you are careful and get all of the exact versions of everythi...
   Author: John Lilley, 2013-06-03, 16:59
RE: What else can be built on top of YARN. - Hadoop - [mail # user]
...Rahul,  This is a very good question, and one we are grappling with currently in our application port.  I think there are a lot of legacy data-processing applications like ours whi...
   Author: John Lilley, 2013-06-01, 14:02
RE: OpenJDK? - Hadoop - [mail # user]
...Great, that's what I've done.  At least I think so.  This is JRE6 right?  # java -version java version "1.6.0_43" Java(TM) SE Runtime Environment (build 1.6.0_43-b01) Java Hot...
   Author: John Lilley, 2013-05-29, 16:53
[expand - 1 more] - RE: Shuffle phase replication factor - Hadoop - [mail # user]
...Ling, Thanks for the response!  I could use more clarification on item 1.  Specifically  *         mapred.reduce.parallel.copies  limits the number of...
   Author: John Lilley, 2013-05-23, 17:22
YARN in 2.0 and 0.23 - Hadoop - [mail # user]
...We intend to use the YARN APIs fairly soon.  Are there notable differences in YARNs classes, interfaces or semantics between 0.23 and 2.0?  It seems to be supported on both version...
   Author: John Lilley, 2013-05-22, 14:38
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