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Re: Differences between 'mapped' and 'mapreduce' packages - MapReduce - [mail # user]
...thought of as having user facing client code that can be invoked, extended etc as applicable from client programs.  The mapred package is to be treated as internal to the mapreduce syst...
   Author: Hemanth Yamijala, 2013-01-08, 04:40
Re: Reg: Fetching TaskAttempt Details from a RunningJob - MapReduce - [mail # user]
...Hi,  In Hadoop 1.0, I don't think this information is exposed. The TaskInProgress is an internal class and hence cannot / should not be used from client applications. The only way out s...
   Author: Hemanth Yamijala, 2013-01-08, 04:30
Re: What is the preferred way to pass a small number of configuration parameters to a mapper or reducer - MapReduce - [mail # user]
...If it is a small number, A seems the best way to me.  On Friday, December 28, 2012, Kshiva Kps wrote:  ...
   Author: Hemanth Yamijala, 2012-12-30, 08:24
Re: Sane max storage size for DN - MapReduce - [mail # user]
...This is a dated blog post, so it would help if someone with current HDFS knowledge can validate it: http://developer.yahoo.com/blogs/hadoop/posts/2010/05/scalability_of_the_hadoop_dist/ . &n...
   Author: Hemanth Yamijala, 2012-12-13, 14:51
Re: Using Hadoop infrastructure with input streams instead of key/value input - MapReduce - [mail # user]
...Hi,  I have not tried this myself before, but would libhdfs help ?  http://hadoop.apache.org/docs/stable/libhdfs.html  Thanks Hemanth   On Mon, Dec 3, 2012 at 9:52 PM, Wh...
   Author: Hemanth Yamijala, 2012-12-04, 08:36
Re: problem using s3 instead of hdfs - MapReduce - [mail # user]
...Parth,  I notice in the below stack trace that the LocalJobRunner, instead of the JobTracker is being used. Are you sure this is a distributed cluster ? Could you please check the value...
   Author: Hemanth Yamijala, 2012-10-16, 15:10
Re: Question about how to find which file takes the longest time to process and how to assign more mappers to process that particular file - MapReduce - [mail # user]
...Hi,  Roughly, this information will be available under the 'Hadoop map task list' page in the Mapreduce web ui (in Hadoop-1.0, which I am assuming is what you are using). You can reach ...
   Author: Hemanth Yamijala, 2012-10-05, 04:21
Re: Submitting a job to a remote cluster - MapReduce - [mail # user]
...Hi,  Could you please share your setup details - i.e. how many slaves, how many datanodes and tasktrackers. Also, the configuration - in particular hdfs-site.xml ?  To answer your ...
   Author: Hemanth Yamijala, 2012-10-05, 04:08
Re: hadoop issue on distributed cluster - MapReduce - [mail # user]
...Hi,  Didn't check everything. But found this in the mapred-site.xml:    mapred.job.tracker  hdfs://  true   The value shouldn't be a HDFS URL. C...
   Author: Hemanth Yamijala, 2012-10-05, 04:02
Re: A small portion of map tasks slows down the job - MapReduce - [mail # user]
...Hi,  Would reducing the output from the map tasks solve the problem ? i.e. are reducers slowing down because a lot of data is being shuffled ?  If that's the case, you could see if...
   Author: Hemanth Yamijala, 2012-10-03, 13:37
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