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[expand - 2 more] - Re: New to hadoop, trying to write a customary file split - MapReduce - [mail # user]
...You are correct = they got refactored int readFromCurrentBuffer  On Mon, Jul 18, 2011 at 11:47 AM, Erik T  wrote:    Steven M. Lewis PhD 4221 105th Ave NE Kirkland, WA 98...
   Author: Steve Lewis, 2011-07-18, 20:32
Re: security policy rules to reduce tasks? - MapReduce - [mail # user]
...Why not install a Security Manager in the reducer's setup step?   On Sun, Jul 10, 2011 at 10:26 PM, Pedro Sa Costa  wrote:    Steven M. Lewis PhD 4221 105th Ave NE Kirkla...
   Author: Steve Lewis, 2011-07-11, 15:19
Re: "java.lang.Throwable: Child Error " And " Task process exit with nonzero status of 1." - MapReduce - [mail # user]
...We have seen that limit reached when we ran a large number of jobs (3000 strikes me as the figure but the real number may be hire) It has to do with the number of files created in a 24 hour ...
   Author: Steve Lewis, 2011-07-11, 15:18
Is there a way to insure that different jobs have the same number of reducers - MapReduce - [mail # user]
...I am trying to run an application where I try to generate the cartesion product of two potentially large data sets. In reality I only need the cartesian product of values in the set with a p...
   Author: Steve Lewis, 2011-06-30, 01:05
[expand - 1 more] - Re: Algorithm for cross product - MapReduce - [mail # user]
...The approach you suggest is similar to what I am currently doing but it requires you to size the partitions to the memory available on the reducer. This is a non-trivial task and is not nece...
   Author: Steve Lewis, 2011-06-23, 17:07
Is there any way for the reducer to determine the total number of reduce tasks? - MapReduce - [mail # user]
...Also is there a good way in code to determine whether job is running on a cluster or in local mode.  I want certain debugging information to log only in local mode  Steven M. Lewis...
   Author: Steve Lewis, 2011-06-22, 22:12
Re: Custom input format query - MapReduce - [mail # user]
...1) add          @Override         public Text getCurrentKey() {             return key;        ...
   Author: Steve Lewis, 2011-05-20, 00:57
Re: How to create a SequenceFile more faster? - MapReduce - [mail # user]
...Even for a single machine (and there may be reasons to use a single machine if the original data is not splittable) Our experience suggests it should take about an hour to process 32 GB on a...
   Author: Steve Lewis, 2011-05-12, 15:55
Re: Passing an Object to All Reducers - MapReduce - [mail # user]
...If possible serialize the object as XML then add it as a set of lines to the config - alternatively serialize it (maybe xml) to a known spot in HDFS and read it in in the setup code in the r...
   Author: Steve Lewis, 2011-05-06, 17:55
Re: Creating custom input split.l - MapReduce - [mail # user]
...This is a custom splitter for extracting XML Tags from XML documents - to use is subclass as follows. It assumes the document is pretty printed with the start and end tags on separate lines....
   Author: Steve Lewis, 2011-04-09, 16:20
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