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 ...

Apache Spark for Big Analytics

by Thomas Dinsmore, Director of Product Management at Revolution Analytics The emergence of Apache Spark is a key development for Big Analytics in 2013.   Spark, an Apache incubator project, is an open source distributed computing framework for advanced analytics in Hadoop.  ...
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