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[HADOOP-7016] Optimize locking codepath in LocalDirAllocator.getLocalPathToRead() and reduce creating many Path objects - Hadoop - [issue]
...LocalDirAllocator.getLocalPathToRead() is called from TaskTracker to retrieve temporary map output location. This method is synchronized and amount of time spent on this method directly affe...
http://issues.apache.org/jira/browse/HADOOP-7016    Author: Rajesh Balamohan, 2013-10-15, 17:08
Re: Announcing Bangalore Hadoop Meetup Group - Hadoop - [mail # user]
...Excellent effort Sharad,  Please do let us know the event timing.  ~Rajesh.B  On Thu, Nov 17, 2011 at 6:31 PM, Sharad Agarwal wrote:     ~Rajesh.B...
   Author: Rajesh Balamohan, 2011-11-19, 10:21
Re: Comparing two logs, finding missing records - Hadoop - [mail # user]
...I believe you meant,  SELECT * FROM LOG1 LEFT OUTER JOIN LOG2 ON LOG1.recordid = LOG2.recordid WHERE LOG2.recordid is null. (this would produce set of records in LOG1 and which are not ...
   Author: Rajesh Balamohan, 2011-06-27, 07:59
Re: hadoop JobTRACKER error HELP!!! - Hadoop - [mail # dev]
...The following command will switch off safemode.  ./hadoop dfsadmin -safemode leave  On Thu, Aug 5, 2010 at 12:02 AM, Ahmad Shahzad  wrote:     ~Rajesh.B...
   Author: Rajesh Balamohan, 2010-08-07, 03:09
Re: Question regarding Shuffle - Hadoop - [mail # user]
...Check org.apache.hadoop.mapred.ReduceTask and org.apache.hadoop.mapred.TaskTracker->MapOutputServlet  On Thu, Jul 1, 2010 at 9:44 PM, Ahmad Shahzad  wrote:     ~Rajesh...
   Author: Rajesh Balamohan, 2010-07-02, 01:38
Re: Hadoop overhead - Hadoop - [mail # user]
...If its too many short duration jobs, you might want to keep an eye on jobtracker and tweak number of heartbeats processed per second & outofbandheartbeat option. JobTracker might be bombarde...
   Author: Rajesh Balamohan, 2010-04-08, 14:50
Re: Does Hadoop compress files? - Hadoop - [mail # user]
...There is a facility in Hadoop to compress "intermediate mapoutput and job output". Is your question related to reading compressed files itself into hadoop?  If so, refer SequenceFileInp...
   Author: Rajesh Balamohan, 2010-04-04, 03:01
Re: HDFS read/write speeds, and read optimization - Hadoop - [mail # user]
...Also, It would be interesting to know "data.replication" setting you have for this benchmark?  On Sun, Jan 3, 2010 at 8:51 AM, Andreas Kostyrka wrote:    ~Rajesh.B...
   Author: Rajesh Balamohan, 2010-01-03, 13:18
setting JVM argument for child process - Hadoop - [mail # user]
...Friends,  I tried setting "-server -Xms512M -Xmx512M" for "*mapred.child.java.opts" *in mapred-site.xml.  However, while running the sort example, it started throwing errors (basic...
   Author: Rajesh Balamohan, 2009-12-01, 14:25
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