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Re: Mappers vs. Map tasks - Hadoop - [mail # user]
...The code which generates split is part of the InputFormat, which is thegetSplits<http://hadoop.apache.org/docs/r2.2.0/api/org/apache/hadoop/mapred/InputFormat.html#getSplits(org.apache.ha...
4 emails [+ more]    Author: Mohammad Tariq, 2014-02-27, 05:39
Re: Wrong FS hdfs:/localhost:9000 ;expected file/// - Hadoop - [mail # user]
...Hi Chirag,Alternatively, you can add following 2 lines in your code in order to makeit work without having to worry about the classpath :conf.addResource(new Path("/path/to/core-site.xml"));...
   Author: Mohammad Tariq, 2014-02-25, 19:41
Re: Error putting files in the HDFS - Hadoop - [mail # user]
...You are welcome Basu.  Not a problem. You can use *bin/hadoop fs -lsr /* to list down all the HDFS files and directories. See which files are no longer required and delete them using *b...
   Author: Mohammad Tariq, 2013-10-08, 20:08
Re: so the master just died... now what? - Hadoop - [mail # user]
...Hello Tomasz,  Just to add,  Although it says *masters*, the */conf/masters* actually specifies the machine where *SecondaryNameNode* will run. Master daemons run on the machine wh...
   Author: Mohammad Tariq, 2013-09-03, 21:18
Re: Simplifying MapReduce API - Hadoop - [mail # user]
...Just to add to the above comments, you just have to extend the classes * Mapper* and *Reducer* as per the new API.  Warm Regards, Tariq cloudfront.blogspot.com   On Wed, Aug 28, 20...
   Author: Mohammad Tariq, 2013-08-29, 11:47
Re: about replication - Hadoop - [mail # user]
...Are you running DN on both the machines? Could you please show me your DN logs?  Also, consider Oliver's suggestion. It's definitely a better option.    Warm Regards, Tariq cl...
2 emails [+ more]    Author: Mohammad Tariq, 2013-08-23, 07:38
Re: How to update a file which is in HDFS - Hadoop - [mail # user]
...The current stable release doesn't support append, not even through the API. If you really want this you have to switch to hadoop 2.x. See this JIRA .  Warm Regards, Tariq cloudfront.bl...
2 emails [+ more]    Author: Mohammad Tariq, 2013-07-05, 00:50
Re: - Hadoop - [mail # user]
...Or show the logs to us.  Warm Regards, Tariq cloudfront.blogspot.com   On Wed, Jun 26, 2013 at 2:03 PM, Devaraj k  wrote:  ...
   Author: Mohammad Tariq, 2013-06-26, 12:14
Re: How can we download a file using WebHDFS REST API - Hadoop - [mail # user]
...Hello Mustaqeem,            I don't think this is possible through webHDFS, as others have said. But you could use wget(courtesy Datanode API) to download the f...
   Author: Mohammad Tariq, 2013-06-03, 18:58
Re: size of input files - Hadoop - [mail # user]
...You could also get the size from the JT logs. See the line  containing :  *INFO org.apache.hadoop.mapred.JobInProgress: Input size for job*  Warm Regards, Tariq cloudfront.blo...
   Author: Mohammad Tariq, 2013-06-02, 19:20
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