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Re: Ignore keys while scheduling reduce jobs - MapReduce - [mail # user]
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...Hi, When do you know the keys to ignore ? You mentioned "after the map stage" .. is this at the end of each map task, or at the end of all map tasks ? Thanks hemanth On Fri...
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Author: Hemanth Yamijala,
2012-09-14, 11:13
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Re: What's the basic idea of pseudo-distributed Hadoop ? - MapReduce - [mail # user]
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...One thing to be careful about is paths of dependent libraries or executables like streaming binaries. In pseudo distributed mode, since all processes are looking on the same machine, it is l...
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Author: Hemanth Yamijala,
2012-09-14, 08:21
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Re: Configuration of hadoop.job.history.user.location on a user basis - MapReduce - [mail # user]
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...Hi Bretrand, Could you try using user.name as a property in the value of the config item ? Something like /user/${user.name}/history ? Thanks hemanth On Thu, Sep 13, 2012 a...
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Author: Hemanth Yamijala,
2012-09-14, 03:54
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Re: how to specify the root directory of hadoop on slave node? - MapReduce - [mail # user]
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...Hi Richard, If you have installed the hadoop software on the same locations on all machines and if you have a common user on all the machines, then there should be no explicit need to ...
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Author: Hemanth Yamijala,
2012-09-12, 04:06
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Re: Error in : hadoop fsck / - MapReduce - [mail # user]
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...Could you please review your configuration to see if you are pointing to the right namenode address ? (This will be in core-site.xml) Please paste it here so we can look for clues. Tha...
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Author: Hemanth Yamijala,
2012-09-11, 15:59
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[MAPREDUCE-4650] Provide an ability to show task counters for a given task type in Web UI - MapReduce - [issue]
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...In the Web UI for Hadoop (post YARN), there is a view that lists counter values per task for a given counter (singlejobcounter page). I found this very useful to get a consolidated view of a...
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http://issues.apache.org/jira/browse/MAPREDUCE-4650
Author: Hemanth Yamijala,
2012-09-11, 12:39
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Re: hadoop trunk build failure - yarn, surefire related? - MapReduce - [mail # user]
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...Also, for the maven based builds, BUILDING.txt in the root folder of hadoop source does get one started. Thanks hemanth On Tue, Sep 11, 2012 at 4:28 PM, Harsh J wrote: &nbs...
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Author: Hemanth Yamijala,
2012-09-11, 11:02
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Re: Understanding of the hadoop distribution system (tuning) - MapReduce - [mail # user]
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...Hi, Responses inline to some points. On Tue, Sep 11, 2012 at 7:26 AM, Elaine Gan wrote: These two configurations essentially tell the tasktrackers that they can run ...
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Author: Hemanth Yamijala,
2012-09-11, 04:19
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Re: Log aggregation in Yarn - MapReduce - [mail # user]
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...Hi, I figured out what the issue is. I'd configured my yarn.nodemanager.remote-app-log-dir to be ${yarn.log.dir}/logs. This doesn't per se make sense because this is a remote loc...
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Author: Hemanth Yamijala,
2012-09-10, 13:38
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Re: Reading from HDFS from inside the mapper - MapReduce - [mail # user]
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...Hi, You could check DistributedCache ( http://hadoop.apache.org/common/docs/stable/mapred_tutorial.html#DistributedCache). It would allow you to distribute data to the nodes where your...
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Author: Hemanth Yamijala,
2012-09-10, 10:06
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