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Re: File formats in Hadoop: Sequence files vs AVRO vs RC vs ORC - MapReduce - [mail # user]
...for xml files processing hadoop comes with a class for this purpose called StreamXmlRecordReader,You can use it by setting your input format to StreamInputFormat and setting the stream.recor...
   Author: Raj K Singh, 2013-09-30, 08:08
[expand - 1 more] - Re: How to hide web hdfs URL - MapReduce - [mail # user]
...n ot sure with the java but javascript can really help you in that,you can find my examples of url shortening javascript api on web.  Raj K Singh http://www.rajkrrsingh.blogspot.com Mob...
   Author: Raj K Singh, 2013-08-15, 15:06
Re: mapper and reducer task failure - MapReduce - [mail # user]
...it seems that you are running hadoop locally on windows using cygwin and having a problem of permission.  Raj K Singh http://www.rajkrrsingh.blogspot.com Mobile  Tel: +91 (0)989982...
   Author: Raj K Singh, 2013-08-15, 13:59
Hadoop ApprovalTest library - MapReduce - [mail # user]
...could anyone point me to the good documentation available for the ApprovalTest API which can give insight of writing MR unit tests.  Thanks Raj K Singh http://www.rajkrrsingh.blogspot.c...
   Author: Raj K Singh, 2013-08-15, 12:15
Re: Reduce Task Clarification - MapReduce - [mail # user]
...Implement raw comparator for your emitted keys to sort the output at the reducer.  Raj K Singh http://www.rajkrrsingh.blogspot.com Mobile  Tel: +91 (0)9899821370   On Wed, Aug...
   Author: Raj K Singh, 2013-08-14, 09:18
Re: Maven Cloudera Configuration problem - MapReduce - [mail # user]
...there is no way to specify conf settings in the maven pom.xml,instead you can build your project based on the profile and specify the properties into up property file.  for setting the ...
   Author: Raj K Singh, 2013-08-14, 09:05
[expand - 1 more] - Re: getting errors on datanode/tasktracker logs - MapReduce - [mail # user]
...its seems to be a bug in java,run a test jar on ur cluster  fallow  http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6727824  Raj K Singh http://www.rajkrrsingh.blogspot.com...
   Author: Raj K Singh, 2013-08-10, 08:17
Re: Copy data from Mainframe to HDFS - MapReduce - [mail # user]
...in mainframe you can have 3 type of datasources  DB2 or IMS supprt the export utilities to copy the data into flat file which you can get through ftp/sftp VSAM file can be exported usin...
   Author: Raj K Singh, 2013-07-23, 07:07
Re: Hadoop property precedence - MapReduce - [mail # user]
...I think it will take 128MB of file size which is given in namenode config file but nt sure not even try it.  Raj K Singh http://www.rajkrrsingh.blogspot.com Mobile  Tel: +91 (0)989...
   Author: Raj K Singh, 2013-07-12, 16:54
Re: copyToLocal Failed inside the cleanup(.........) of Map task - MapReduce - [mail # user]
...by default hadoop keep intermediate values produced by mapper in the local file system,you can get the the handle on it using FileOutputFormat.getWorkOutputPath(context)  Raj K Singh ht...
   Author: Raj K Singh, 2013-06-04, 04:54
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