Hadoop Cluster Commissioning and Decommissioning Nodes

To add new nodes to the cluster: 1. Add the network addresses of the new nodes to the include file. hdfs-site.xml <property> <name>dfs.hosts</name> <value>/<hadoop-home>/conf/includes</value> <final>true</final> </property> mapred-site.xml <property> <name>mapred.hosts</name> <value>/<hadoop-home>/conf/includes</value> <final>true</final> </property> Datanodes that are permitted to connect to the namenode are specified in a file whose name is specified by the dfs.hosts property. Includes file ...

5 lessons we learned about data science in 2013

Most people know what marketing executives do every day. They try to catch people’s attention through email, ads, tweets, and press releases. As for data scientists, well, their work is not nearly as well understood. That’s been slowly changing this year ...
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