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Re: hybrid map/reducer scheduler? - Hadoop - [mail # user]
...Michael,  ity scheduler. In some sense, fair scheduler can be considered a user-based  scheduling while capacity scheduler does a queue-based scheduling. Is ther e or will there be...
   Author: Hemanth Yamijala, 2010-06-29, 04:15
Re: memory management of capacity scheduling - Hadoop - [mail # user]
...Shashank,   First things first - the memory management implementation in the capacity scheduler has seen significant improvements in Hadoop 0.21. Specifically, the implementation in Had...
   Author: Hemanth Yamijala, 2010-06-26, 18:09
[expand - 1 more] - Re: Stuck MR job - Hadoop - [mail # user]
...Vidhya,  ory related parameters ? nning in tandem).  Unfortunately, I still need more information:  - What is the version/distribution of Hadoop ? Are you using Capacity sched...
   Author: Hemanth Yamijala, 2010-06-23, 17:14
[expand - 2 more] - Re: Feed hdfs with external data. - Hadoop - [mail # user]
...Sorry, I might have misunderstood... So, you have a Java application that needs to use this configuration. In that case, I think setting the directory containing the config files into the cl...
   Author: Hemanth Yamijala, 2010-06-23, 14:30
Re: Hadoop JobTracker Hanging - Hadoop - [mail # user]
...There was also https://issues.apache.org/jira/browse/MAPREDUCE-1316 whose cause hit clusters at Yahoo! very badly last year. The situation was particularly noticeable in the face of lots of ...
   Author: Hemanth Yamijala, 2010-06-22, 17:20
Re: How to set the number of map tasks? (ver 0.20.2) - Hadoop - [mail # user]
...Felix,  uce/Job.html  As documented in the mapreduce tutorial as well as the Java documentation (http://bit.ly/9HKclu), the number of map tasks is primarily determined by the numbe...
   Author: Hemanth Yamijala, 2010-06-22, 01:43
Re: AccessControlException when calling copyFromLocalFile() - Hadoop - [mail # user]
...Ted,  ion , an,  Path) ne: ne: ser  Is there a reason why access cannot be given to the user on DFS during setup, using dfs -chmod or dfs -chown ? That seems a more correct so...
   Author: Hemanth Yamijala, 2010-06-03, 01:49
Re: JNI native library loading problem in standalone mode - Hadoop - [mail # user]
...Edward,  If it's an option to copy the libraries to a fixed location on all the cluster nodes, you could do that and configure them in the library path via mapred.child.java.opts. Pleas...
   Author: Hemanth Yamijala, 2010-06-01, 03:47
Re: Tasktracker appearing from "nowhere" - Hadoop - [mail # user]
...Peter,   If m351 has Hadoop and a mapred-site.xml or hadoop-site.xml pointing to the right JobTracker, it would register itself as a TaskTracker when Hadoop starts on it. The slave file...
   Author: Hemanth Yamijala, 2010-05-28, 09:51
Re: TaskTracker and DataNodes cannot connect to master node (NoRouteToHostException) - Hadoop - [mail # user]
...Erik,  ct ct ct ct ct ct ct ct ct ct l  Can you connect to from the host running your datanode - outside of Hadoop ? It seems like it is not reachable. Also, what pla...
   Author: Hemanth Yamijala, 2010-05-26, 02:05
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