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[expand - 1 more] - Re: Binning for numerical dataset - Hadoop - [mail # user]
...To do binning in MapReduce we need to find min and max in mapper  letmapper() pass the min,max values to reducer.then after reducer calculatethe buckets.Is that the best way*Thanks & Re...
   Author: unmesha sreeveni, 2014-02-05, 06:52
Pre-processing in hadoop - Hadoop - [mail # user]
...Are we able to do preprocessing such as1.Binning2.Discretizationin hadoop.Some of the reviews are telling it is difficult.Is that right.Pls share some links that will help me alot.*Thanks & ...
   Author: unmesha sreeveni, 2014-01-30, 05:41
[expand - 4 more] - Re: Sorting a csv file - Hadoop - [mail # user]
...are we able to sort multiple columns dynamically as the user suggests? ie user requests to sort col1 and col2 then the user request to sort 3 cols I am not able to find anyof the stuff throu...
   Author: unmesha sreeveni, 2014-01-17, 10:16
Sorting in decending order - Hadoop - [mail # user]
...Are we able to sort a csv file in descending order.   *Thanks & Regards*  Unmesha Sreeveni U.B Junior Developer  http://www.unmeshasreeveni.blogspot.in/...
   Author: unmesha sreeveni, 2014-01-16, 14:28
Re: Adding file to HDFs - Hadoop - [mail # user]
...I tried to copy a 2.5 gb to hdfs. it took 3 -4 min. Are we able to reduce that time.   On Tue, Jan 14, 2014 at 3:07 PM, unmesha sreeveni wrote:    *Thanks & Regards*  Unm...
   Author: unmesha sreeveni, 2014-01-14, 18:44
Expressions in MapReduce - Hadoop - [mail # user]
...Are we able to do expresions in Mapreduce Say if i am having a csv file . which has 2 columns. The user is giving an expresion col1  + col2 = col3 Are we able to do this? And when again...
   Author: unmesha sreeveni, 2014-01-11, 18:45
Re: what all can be done using MR - Hadoop - [mail # user]
...For that do we have to write a custom class for value inorder to pass all the columns as value. ie in the example 2 values. Or jst do a concatenation and emit values.   On Sat, Jan 11, ...
   Author: unmesha sreeveni, 2014-01-11, 16:20
Get dynamic values in a user defined class from reducer. - Hadoop - [mail # user]
...Can any one pls suggest a good way My scenario: i hav 1.Driver class 2.Mapper class 3.reducer class 4.Mid class After completing mapper it goes to reduce. From reducer it will be going to Dr...
   Author: unmesha sreeveni, 2013-12-18, 10:02
Re: Hadoop-MapReduce - Hadoop - [mail # user]
...Ranjini can u pls check this. This is not perfect ..I simply did to check my xml data. https://github.com/studhadoop/xmlparsing-hadoop/blob/master/XmlParser11.java   On Tue, Dec 17, 201...
   Author: unmesha sreeveni, 2013-12-17, 09:04
Found checksum error - Hadoop - [mail # user]
...I am trying to run Decision Tree explained in  http://btechfreakz.blogspot.in/2013/04/implementation-of-c45-algorithm-using.html  But while running i am getting Checksum error &nbs...
   Author: unmesha sreeveni, 2013-12-05, 09:59
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