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RE: How to set Rack Id of DataNodes? - HDFS - [mail # user]
...Hi Mohammad,     Yes that's correct your "rack awareness" script takes the IP address of a node and returns the rack name/id.  You then just have to ensure the script is execu...
   Author: Vijay Thakorlal, 2013-04-15, 12:50
RE: Namenode formatting problem - HDFS - [mail # user]
...Hi Keith,  When you run the format command on the namenode machine it actually starts the namenode, formats it then shuts it down (see: http://hadoop.apache.org/docs/stable/commands_man...
   Author: Vijay Thakorlal, 2013-02-19, 16:18
RE: Reg Too many fetch-failures Error - HDFS - [mail # user]
...Hi Manoj,     As you may be aware this means the reduces are unable to fetch intermediate data from TaskTrackers that ran map tasks - you can try:  * increasing tasktracker.ht...
   Author: Vijay Thakorlal, 2013-02-01, 17:52
RE: Maximum Storage size in a Single datanode - HDFS - [mail # user]
...Hi Jeba,     There are other considerations too, for example, if a single node holds 1 PB of data and if it were to die this would cause a significant amount of traffic as NameNode...
   Author: Vijay Thakorlal, 2013-01-30, 09:47
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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