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Re: Feedback on real world production experience with Flume - Hadoop - [mail # user]
...Can the NFS become the bottleneck ?  Chen  On Sat, Apr 21, 2012 at 5:23 PM, Edward Capriolo wrote:  ...
   Author: Chen He, 2012-04-21, 23:50
[expand - 1 more] - Re: Yuan Jin is out of the office. - Hadoop - [mail # user]
...This is the second time. Pure junk email. Could you avoid sending email to public mail-list, Ms/Mr. Yuan Jin?  On Thu, Apr 12, 2012 at 6:22 PM, Chen He  wrote:  ...
   Author: Chen He, 2012-04-12, 23:23
Re: start hadoop slave over WAN - Hadoop - [mail # user]
...login your remote datanode and start the datanode manually to see what happen.  start HDFS based on the WAN is not as easy as on a cluster. There are many issues. datanode log should be...
   Author: Chen He, 2012-03-30, 22:38
Re: Article - Hadoop - [mail # dev]
...sounds interesting. Need more detail  On Tue, Mar 20, 2012 at 2:19 PM, shashwat shriparv  wrote:  ...
   Author: Chen He, 2012-03-20, 19:58
[expand - 1 more] - Re: mapred.map.tasks vs mapred.tasktracker.map.tasks.maximum - Hadoop - [mail # user]
...if you do not specify  setNumMapTasks, by default, system will use the number you configured  for "mapred.map.tasks" in the conf/mapred-site.xml file.  On Fri, Mar 9, 2012 at ...
   Author: Chen He, 2012-03-10, 02:19
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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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB