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Re: Lack of data locality in Hadoop-0.20.2 - MapReduce - [mail # user]
...On Jul 12, 2011, at 10:27 AM, Virajith Jalaparti wrote:  factor is more   How did you load your data?   Did you load it from outside the grid or from one of the  datanode...
   Author: Allen Wittenauer, 2011-07-12, 18:20
Re: Dead data nodes during job excution and failed tasks. - MapReduce - [mail # user]
...On Jun 30, 2011, at 12:36 PM, David Ginzburg wrote:   That only controls how aggressive the system swaps.  If you eat  all the RAM in user space, the system is going to start...
   Author: Allen Wittenauer, 2011-07-01, 01:19
Re: How does Hadoop manage memory? - MapReduce - [mail # user]
...On Jun 28, 2011, at 1:43 PM, Peter Wolf wrote:  run many Speech Recognizers in parallel. use a large amount of memory.  Also, in my application, they are often  idle much of t...
   Author: Allen Wittenauer, 2011-06-30, 19:00
Re: Emit an entire file - MapReduce - [mail # user]
...On Jun 28, 2011, at 6:19 AM, Jeremy Cunningham wrote:  POI and can search with no problems. I want to be able to search for  keywords (which I can do) and then copy the file that h...
   Author: Allen Wittenauer, 2011-06-30, 18:52
Re: 0.20.203 and missing TaskTracker metrics - MapReduce - [mail # dev]
...On Jun 23, 2011, at 12:06 PM, Allen Wittenauer wrote:  Things like completed tasks are always zero.   Hmmm.... DataNode RPC metrics are also 0.  Looks like this is just plain ...
   Author: Allen Wittenauer, 2011-06-24, 00:04
Re: tasktracker maximum map tasks for a certain job - MapReduce - [mail # user]
...On Jun 22, 2011, at 2:20 PM, Jonathan Zukerman wrote: reducers ("loadmanager.maximum.maps.per.tasktracker"   I don't use fairshare, so i'm unable to help you there....
   Author: Allen Wittenauer, 2011-06-23, 22:16
Re: "No space left on device" and "Could not find any valid local directory for taskTracker/jobcache/" - MapReduce - [mail # user]
...On Jun 23, 2011, at 7:09 AM, Virajith Jalaparti wrote:  50GB of cluster as org.apache.hadoop.fs.RawLocalFileSystem$LocalFSFileOutputStream.write(RawL ocalFileSystem.java:190)   Thi...
   Author: Allen Wittenauer, 2011-06-23, 19:14
Re: Large startup time in remote MapReduce job - MapReduce - [mail # user]
...On Jun 22, 2011, at 10:08 AM, Allen Wittenauer wrote:  transmitted change code.   (I suppose the exception to this rule is all the java code at  places like NASA, JPL, etc in...
   Author: Allen Wittenauer, 2011-06-22, 17:11
Re: controlling no. of mapper tasks - MapReduce - [mail # user]
...On Jun 20, 2011, at 12:24 PM,    wrote:  tasks and hadoop honours it but "mapred.map.tasks" is not honoured by  Hadoop. Is there any way to control number of map tasks? W...
   Author: Allen Wittenauer, 2011-06-22, 17:06
Re: concurrent job execution - MapReduce - [mail # user]
...On Jun 3, 2011, at 1:11 AM, Felix Sprick wrote:  application.   In addition to moving from the FIFO/default scheduler, make sure  your GUI application actually submits the job...
   Author: Allen Wittenauer, 2011-06-06, 22:09
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