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HDFS temporary file locations - HDFS - [mail # user]
...Is there any convention for clients/applications wishing to use temporary file space in HDFS?  For example, my application wants to:  1)      Load data into some tem...
   Author: John Lilley, 2013-07-02, 19:25
RE: How can a YarnTask read/write local-host HDFS blocks? - HDFS - [mail # user]
...Blah blah, One point you might have missed: multiple tasks cannot all write the same HDFS file at the same time.  So you can't just split an output file into sections and say "task1 wri...
   Author: John Lilley, 2013-07-02, 18:13
HDFS file section rewrite - HDFS - [mail # user]
...I'm sure this has been asked a zillion times, so please just point me to the JIRA comments: is there a feature underway to allow for re-writing of HDFS file sections? Thanks John  ...
   Author: John Lilley, 2013-07-02, 16:01
[expand - 3 more] - RE: How to design the mapper and reducer for the following problem - HDFS - [mail # user]
...On further thought, it would be simpler to augment Reducer1 to use disk when it does not fit into memory.  Nested looping over the disk file is sequential and will be fast.  Then y...
   Author: John Lilley, 2013-06-16, 19:40
RE: Assignment of data splits to mappers - HDFS - [mail # user]
...Bertrand, Thanks for taking the time to explain this! I understand your point about contiguous blocks; they just aren't likely to exist.  I am still curious about two things:  1) &...
   Author: John Lilley, 2013-06-14, 19:50
[expand - 1 more] - RE: container allocation - HDFS - [mail # user]
...Thanks that is good to know.  Is there any way to say "please fail if I don't get the node I want?"  Do I just release the container and try again? I'd like to understand the impli...
   Author: John Lilley, 2013-06-14, 19:41
[expand - 1 more] - RE: Shuffle design: optimization tradeoffs - HDFS - [mail # user]
...In reading this link as well as the sailfish report, it strikes me that Hadoop skipped a potentially significant optimization.  Namely, why are multiple sorted spill files merged into a...
   Author: John Lilley, 2013-06-12, 18:08
RE: log4j defaults for AM & task - HDFS - [mail # user]
...Thanks I would have never guessed ;-) I assume it will sub anywhere on the cmdline like: mycommand -logdir= john  From: Arun C Murthy [mailto:[EMAIL PROTECTED]]  Sent: Thursday, Ju...
   Author: John Lilley, 2013-06-06, 22:28
[expand - 1 more] - RE: Hadoop JARs and Eclipse - HDFS - [mail # user]
...If I am running from built code that was installed with  mvn install Do I need to change the pom.xml file to reflect that I am using local repository? Thanks, John   From: Harsh J ...
   Author: John Lilley, 2013-06-06, 17:05
YARN servers and ports - HDFS - [mail # user]
...What service addresses and ports does a YARN ApplicationMaster need to know about? Thanks, John  ...
   Author: John Lilley, 2013-06-05, 17:10
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