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Re: Collecting MAP output in a Iterator - MapReduce - [mail # user]
...The reducer has to open MAP2 explicitly. If it is a regular file, it has to be in distributed cache.  On Mon, Aug 20, 2012 at 12:56 PM, Siddharth Tiwari  wrote: d of    L...
   Author: Lance Norskog, 2012-08-20, 20:24
Re: Can Hadoop replace the use of MQ b/w processes? - MapReduce - [mail # user]
...Cool. I'm on the sidelines of a project trying to use Oozie in a large Hadoop-ecology app. Oozie is the one thing marked 'to be replaced'.  On Sun, Aug 19, 2012 at 6:31 PM, Russell Jurn...
   Author: Lance Norskog, 2012-08-20, 01:57
Re: Can Hadoop replace the use of MQ b/w processes? - MapReduce - [mail # user]
...Last checkin on Azkaban was 11 months ago: https://github.com/azkaban/azkaban/commit/b105570625bcb2002de1acf4012c8d0e4 388470a  But, the last checkin for Hamake was June 2010. And it's ...
   Author: Lance Norskog, 2012-08-20, 00:43
Re: Hadoop's dependency on Linux - MapReduce - [mail # user]
...But none of these explain the problem.  You need a program called 'chmod' in your execution path.  It doesn't actually need to be chmod.  On Fri, Apr 13, 2012 at 2:44 AM, Than...
   Author: Lance Norskog, 2012-04-14, 22:53
Re: Starting Map Reduce Job on EC2 - MapReduce - [mail # user]
...Can you open all of the monitoring browser ports?  On Sun, Jan 15, 2012 at 3:03 PM, Something Something  wrote: s it safe to cious d  M/R job - ied 0 - ied 1 - ied 2   I a &nb...
   Author: Lance Norskog, 2012-01-16, 01:00
Re: Gratuitous use of CHMOD in windows - MapReduce - [mail # user]
...This is the only problem with running Hadoop on Windows without Cygwin.  Also, you might be able to install the 'core' package of 'gnuwin32' and add the chmod.exe there to your path. &n...
   Author: Lance Norskog, 2011-11-23, 04:35
Re: How to Create an effective chained MapReduce program. - MapReduce - [mail # user]
...You might find it more easy to understand this if you use one of the low-level job-scripting languages like Oozie or Hamake. They put the whole assemblage of stuff into one file.  On We...
   Author: Lance Norskog, 2011-09-07, 22:52
Re: Extending ArrayWritable, Using Combiner and Spill Failed error - MapReduce - [mail # user]
...Combiners are supposed to emit exactly what they receive. Hadoop should look at what the combiner spits out and blow up.  On Thu, Aug 18, 2011 at 9:32 PM, Harsh J  wrote:  wro...
   Author: Lance Norskog, 2011-08-19, 05:03
Re: Algorithm for cross product - MapReduce - [mail # user]
...If you have scaling problems, check out the Mahout project. They are all about distributed scalable linear algebra & more. http://mahout.apache.org  Lance  On Wed, Jun 22, 2011 at ...
   Author: Lance Norskog, 2011-06-23, 00:33
Re: A way to monitor HDFS for a file to come live, and then kick off a job? - MapReduce - [mail # user]
...Hamake does exactly this:  http://code.google.com/p/hamake/  On Fri, Mar 25, 2011 at 9:46 AM, Allen Wittenauer  wrote: nce this is really about watching files in HDFS. ob. if ...
   Author: Lance Norskog, 2011-05-15, 22:09
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