In this recipe, we will look at tuning the Datanode by making some important configuration changes. Datanodes are mostly I/O bound, but can have a varied workload for HBase region servers. The network throughout the disks must be tuned for optimal performance.
We will look at parameters only for the Datanode, which in production will come into effect in conjunction with HDFS and Namenode parameters, discussed earlier in this chapter.
For this recipe, you will again need a running cluster and have at least the HDFS daemons running in the cluster.
master1.cyrus.comand switch to user
hdfs-site.xmlfile will remain the same in the cluster. Each of the Namenode and Datanode ...