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[expand - 1 more] - Custom comparator when using Kryo serializer for MapReduce serialization - Hadoop - [mail # user]
...Thanks for the reply.How can I guarantee that in a distributed system?On Wed, Aug 19, 2015 at 8:06 PM, William Slacum  wrote:> In a general sense, if you can guarantee that your obje...
   Author: Yaron Gonen , 2015-08-21, 06:47
[expand - 5 more] - MAP_INPUT_RECORDS counter in the reducer - MapReduce - [mail # user]
...Hi again, I've run into this link: http://mail-archives.apache.org/mod_mbox/hadoop-mapreduce-user/201112.mbox/%3CCAFE9998.2FEF6%[EMAIL PROTECTED]%3E Looks like a nice idea. Have someone trie...
   Author: Yaron Gonen , 2013-09-20, 09:12
[expand - 5 more] - Naïve k-means using hadoop - MapReduce - [mail # user]
...Thanks! *Bertrand*: I don't like the idea of using a single reducer. A better way for me is to write all the output of all the reducers to the same directory, and then distribute all the fil...
   Author: Yaron Gonen , 2013-03-27, 13:04
[expand - 5 more] - InputFormat for some REST api - MapReduce - [mail # user]
...Thanks, and excellent points. I just wanted to know if someone is working this way and if it is a common use-case.   On Tue, Feb 19, 2013 at 7:39 PM, Mohammad Tariq  wrote:  &...
   Author: Yaron Gonen , 2013-02-19, 19:28
[expand - 5 more] - Profiling the Mapper using hprof on Hadoop 0.20.205 - MapReduce - [mail # user]
...I tried various range values. I'm not even seeing the map method and the recordreader methods. On Feb 7, 2013 3:58 AM, "java8964 java8964"  wrote:  >  What range you gave i...
   Author: Yaron Gonen , 2013-02-07, 04:47
[expand - 5 more] - Selecting a task for the tasktracker - MapReduce - [mail # user]
...Thanks a lot!   On Thu, Dec 27, 2012 at 8:11 PM, Vinod Kumar Vavilapalli  wrote:  > > On top of that, the message indicates that you need to have your scheduler > cla...
   Author: Yaron Gonen , 2012-12-27, 21:18
[expand - 8 more] - Some general questions about DBInputFormat - HDFS - [mail # user]
...Hi again Nick, DBInputFormat does use Connection.TRANSACTION_SERIALIZABLE, but this a per connection attribute. Since every mapper has its own connection, and every connection is opened in a...
   Author: Yaron Gonen , 2012-09-12, 13:54
How to debug - MapReduce - [mail # user]
...Hi, First, add the following to mapred-site.xml :    mapred.child.java.opts   -Xmx512m -Xdebug -Xrunjdwp:transport=dt_socket,address 127.0.0.1:9987,suspend=y  Now. add a ...
   Author: Yaron Gonen , 2012-08-26, 07:06
[expand - 2 more] - Keeping Map-Tasks alive - MapReduce - [mail # user]
...Thanks. As I see it, it cannot be done in the MapReduce 1 framework without changing TaskTracker and JobTracker. Problem is I'm not familiar at all with YARN... it might be possible there. T...
   Author: Yaron Gonen , 2012-08-06, 07:23
[expand - 2 more] - Understanding compression in hdfs - HDFS - [mail # user]
...Is the checksum pluggable? CRC-32 is good for error detection not for duplication check. I need this for duplication check.  On Sun, Jul 29, 2012 at 8:41 PM, Brock Noland  wrote: &...
   Author: Yaron Gonen , 2012-07-29, 20:23