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Re: mapred.tasktracker.map.tasks.maximum not working - Hadoop - [mail # user]
...you set the " mapred.tasktracker.map.tasks.maximum " in your job means nothing. Because Hadoop mapreduce platform only checks this parameter when it starts. This is a system configuration. &...
   Author: Chen He, 2012-03-10, 02:16
Re: Incompatible namespaceIDs after formatting namenode - Hadoop - [mail # user]
...For short, here is a script that may be useful for your to remove hdfs directory on DNs from your headnode.  for each DN hostname    do       ssh root@[DN hostn...
   Author: Chen He, 2012-01-15, 20:16
Re: dual power for hadoop in datacenter? - Hadoop - [mail # user]
...If you configure your replica number as 3 or more. I would suggest you keep half of your nodes with dual power on each rack, especially node with larger or more disks. As well as your nameno...
   Author: Chen He, 2012-01-09, 17:03
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