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[expand - 2 more] - Re: Effects of increasing block size / min split size - Hadoop - [mail # user]
...On Jun 11, 2009, at 11:06 AM, Tarandeep Singh wrote:   Even more important is that the shuffle depends on the number of maps   * reduces. For the sort benchmark, we found that it w...
   Author: Owen O'Malley, 2009-06-12, 23:59
simple udf example? - Hive - [mail # user]
...I've been able to piece together a rough guide for implementation from various blogs / jiras, but does anyone have a basic example publicly available?  There are stubs in the wiki but u...
   Author: james warren, 2009-06-12, 23:07
MapContext.getInputSplit() returns nothing - Hadoop - [mail # user]
...I am working with the wordcount example of Hadoop Pipes (0.20.0). I have a 7 machine cluster.  When I look at MapContext.getInputSplit() in my map function, I see that it returns the em...
   Author: Roshan James, 2009-06-12, 23:02
[CHUKWA-56] Instead of sending -1 when an adaptor is already there, the current adaptorId should be returned - Chukwa - [issue]
http://issues.apache.org/jira/browse/CHUKWA-56    Author: Jerome Boulon, 2009-06-12, 22:12
Rewire and multi-query load/store optimization - Pig - [mail # dev]
...With the implementation of rewire as part of the optimizer infrastructure, a bug was exposed in the load/store optimization in the multi-query feature. Below, I will articulate the bug and t...
   Author: Santhosh Srinivasan, 2009-06-12, 21:19
parsing open xml - Hadoop - [mail # user]
...Hi,  Does hadoop and map / reduce will allow me to parse large quantity of open xml files distributed inside the same filesystem but using multipe jobs ?  Thx  Alexandre Jaque...
   Author: Alexandre Jaquet, 2009-06-12, 20:31
[expand - 1 more] - Re: Blocks disappearing from HDFS - Hive - [mail # user]
...Nevermind, I got it. Files are disappearing because the dfs dir is under /tmp (yes this is a dev cluster). When resources runs low on this box, space is reclaimed and files go poof.   &...
   Author: Bill Graham, 2009-06-12, 20:26
The behavior of HashPartitioner - Hadoop - [mail # user]
...Hi,  The intermediate key generated by my Mappers is IntWritable. I tested with different number of Reducers. When the number of Reducers is the same as the number of different keys of ...
   Author: Zhengguo 'Mike' SUN, 2009-06-12, 18:25
[expand - 3 more] - Re: HDFS data transfer! - Hadoop - [mail # user]
...What's your replication factor?  What aggregate I/O rates do you see   in Ganglia?  Is the I/O spikey, or has it plateaued?  We can hit close to network rate (1Gbps) per ...
   Author: Brian Bockelman, 2009-06-12, 18:24
[expand - 1 more] - Re: Few Issues!!! - Hadoop - [mail # user]
...In case you haven't seen these pages, I recommend:    *     *   Here's some more background information:  Data doesn't flow through the NameNode, only metadata ...
   Author: Marco Nicosia, 2009-06-12, 15:39
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