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Re: Building Hadoop 2.2.0 On Windows 7 64-bit - MapReduce - [mail # user]
...At lease for development work I find that replacing two classes in the Hadoop jar (say putting the following code ahead of the hadoop jars in a project fixes most windows issues - at least i...
   Author: Steve Lewis, 2014-01-17, 16:16
[expand - 1 more] - Re: I need help building Hadoop 2.0 for windows - MapReduce - [mail # user]
...1) I have included the text when I build as described in the document  2) I included my patches to a couple of files in the hadoop jars which fix issues - essentially Hadoop tries to se...
   Author: Steve Lewis, 2014-01-17, 02:41
Re: 答复: Application of MapReduce - MapReduce - [mail # user]
...Hydra is an application for doing tandem mass spectrometry searches for proteomics The search uses three Map-reduce jobs run in succession (the last simply uses a single reducer to create se...
   Author: Steve Lewis, 2013-12-26, 18:44
Re: Execute hadoop job remotely and programmatically - MapReduce - [mail # user]
...out them in  a lib directory in the jar you pass to Hadoop and they will be found   On Mon, Dec 9, 2013 at 12:58 PM, Yexi Jiang  wrote:     Steven M. Lewis PhD 4221 ...
   Author: Steve Lewis, 2013-12-09, 22:00
Advice on code where reducer writes a file - MapReduce - [mail # user]
...I find that in most cases where I solve Hadoop problems the solution consists of several jobs chained together. When problem is solved the solution is almost never wanted in the form of a co...
   Author: Steve Lewis, 2013-09-26, 05:00
[expand - 1 more] - Re: A couple of Questions on InputFormat - MapReduce - [mail # user]
...Thank you for your thorough answer The last question is essentially this - while I can write a custom input format to handle things like hyphens I could do almost the same thing in the mappe...
   Author: Steve Lewis, 2013-09-23, 15:34
[expand - 1 more] - Re: Gathering Statistics for use by Mappers? - MapReduce - [mail # user]
...There is a max counters - 6000 I think bit it can be raised by setting "mapreduce.job.counters.max - I have done this but don't know the performance implications.  What I am doing is co...
   Author: Steve Lewis, 2013-09-02, 19:23
[expand - 1 more] - Re: Some jobs seem to run forever - MapReduce - [mail # user]
...As I said in the original message bad partitioning was my original theory I have had issues with it in the past and am careful with my partitioner. It  was the first thing I looked for ...
   Author: Steve Lewis, 2013-08-29, 17:26
How do I perform a scalable cartesian product - MapReduce - [mail # user]
... I have the problem of performing a operation of a data set on itself.     Assume, for example, that I have a list of people and their addresses and for each person I want the...
   Author: Steve Lewis, 2013-08-14, 17:06
Running Hadoop client as a different user - MapReduce - [mail # user]
...I have been running Hadoop on a clister set to not check permissions. I would run a java client on my local machine and would run as the local user on the cluster.  I say *    ...
   Author: Steve Lewis, 2013-05-12, 19:42
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