How is HBase data stored?

HBase is a distributed, column-oriented NoSQL database system where data is stored in the HDFS (Hadoop Distributed File System). Data in HBase is stored based on row key, column family, column qualifier, and timestamp.

Data is stored in HBase in rows, each row has a unique row key which allows for fast locating and accessing of the data. Each row can contain multiple column families, and each column family can contain multiple column qualifiers. Data is stored within column families instead of individually within column qualifiers to reduce wasted storage space.

In HBase, data is stored based on column families and column identifiers, allowing for dynamic addition of column families and identifiers, which is very flexible. Additionally, HBase supports storing multiple versions of data, with each record having multiple timestamps, enabling queries for data versions within a specified time range.

In general, HBase stores data in a distributed manner, with data stored in HDFS and indexed and stored through row keys, column families, column qualifiers, and timestamps. It is known for its high scalability, performance, and reliability.