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Re: mapred.max.tracker.failures - HDFS - [mail # user]
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...It is a per-job config which controls the automatic job-level blacklist: If, for a single job, a specific tracker has failed 4 (or X) total tasks, then as prevent scheduling anymore of the j...
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Author: Harsh J,
2013-03-07, 06:02
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Re: Best practices for adding services to Hadoop cluster? - HDFS - [mail # user]
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...Can the mapper not directly talk to whatever application server the Windows server runs? Is the work needed to be done in the map step (i.e. per record)? If not, you can perhaps also conside...
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Author: Harsh J,
2013-03-07, 05:21
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Re: location of log files for mapreduce job run through eclipse - HDFS - [mail # user]
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...If you've not changed any configs, look under /tmp/hadoop-${user.name}/ perhaps. On Thu, Mar 7, 2013 at 3:19 AM, Sayan Kole wrote: Harsh J...
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Author: Harsh J,
2013-03-07, 01:01
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Re: preferential distribution of tasks to tasktracker by jobtracker based on specific criteria (cpu frequency) - HDFS - [mail # user]
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...MRv1: Both the CapacityScheduler and FairScheduler support some form of resource aware scheduling (Capacity supports memory provisions while Fair provides an interface you can plug into to i...
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Author: Harsh J,
2013-03-07, 01:00
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Re: mapper combiner and partitioner for particular dataset - HDFS - [mail # user]
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...The MultipleInputs class only supports mapper configuration per dataset. It does not let you specify a partitioner and combiner as well. You will need a custom written "high level" partition...
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Author: Harsh J,
2013-03-03, 11:28
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Re: Urgent Requirement: How to copy File from One cluster to another cluster using java client(throught java Program) - HDFS - [mail # user]
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...Samir, It was pointed out by another member in your earlier post but here it is again. The error returned is sorta clear enough: org.apache.hadoop.security.AccessControlException...
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Author: Harsh J,
2013-03-02, 05:45
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Re: NameNode low on available disk space - HDFS - [mail # user]
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...Actually, I did: http://search-hadoop.com/m/qvn7EhQQHm1. Perhaps you aren't subscribed to the lists and wouldn't have received anything sent back. On Fri, Mar 1, 2013 at 1:21 PM, Mohi...
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Author: Harsh J,
2013-03-01, 07:54
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[HDFS-4509] Provide a way to ask Balancer to exclude certain DataNodes in its computation and/or work. - HDFS - [issue]
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...This comes particularly useful in clusters that have a split between DNs used for regular purpose and DNs used for HBase RSes specifically. By asking the balancer to exclude the DNs that RSe...
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http://issues.apache.org/jira/browse/HDFS-4509
Author: Harsh J,
2013-02-28, 17:41
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Re: hdfs.h C API - HDFS - [mail # dev]
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...Hi!, Assuming you have a "hadoop" command available (i.e. the $HADOOP_HOME/bin/hadoop script), try to do: export CLASSPATH=`hadoop classpath` And then try to run your ./a.o...
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Author: Harsh J,
2013-02-28, 17:29
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Re: where reduce is copying? - HDFS - [mail # user]
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...The latter (from other machines, inbound to where the reduce is running, onto the reduce's local disk, via mapred.local.dir). The reduce will, obviously, copy outputs from all maps that may ...
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Author: Harsh J,
2013-02-28, 07:06
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