HBase is a Hadoop-based, highly available, distributed NoSQL database. In a production environment, an HBase cluster is quite responsive to node failures but there are many administration jobs that are performed by the cluster administrator. This job list includes important tasks such as starting or stopping the cluster, upgrading the OS on the nodes, replacing bad hardware, and backing up data. Also, these jobs need to be done properly to keep the cluster running smoothly. Under this section, we will be covering the details of these cluster management tasks.
Starting or stopping an HBase cluster is a very common task that is performed by any administrator; any kind of configuration change for tuning is a very common scenario. The dependent systems such as HDFS and ZooKeeper are assumed to be running before HBase starts/stops. Apache HBase provides the following script files under the $HBASE_HOME/bin directory to be used for the start/stop operation...
