HBase

HBase is a column-oriented non-relational database management system that runs on top of Hadoop Distributed File System (HDFS).

Hbase is an open source and sorted map data built on Hadoop. It is column oriented and horizontally scalable.

It is based on Google's Big Table.It has set of tables which keep data in key value format. Hbase is well suited for sparse data sets which are very common in big data use cases. Hbase provides APIs enabling development in practically any programming language. It is a part of the Hadoop ecosystem that provides random real-time read/write access to data in the Hadoop File System.

Features of Hbase

• Horizontally scalable: You can add any number of columns anytime.
• Automatic Failover: Automatic failover is a resource that allows a system administrator to automatically switch data handling to a standby system in the event of system compromise
• Integrations with Map/Reduce framework: Al the commands and java codes internally implement Map/ Reduce to do the task and it is built over Hadoop Distributed File System.
• sparse, distributed, persistent, multidimensional sorted map, which is indexed by rowkey, column key,and timestamp.
• Often referred as a key value store or column family-oriented database, or storing versioned maps of maps.