Apache HBase Primer

© Deepak Vohra 2016

Deepak Vohra, Apache HBase Primer, 10.1007/978-1-4842-2424-3_6

6. Row Versioning

Deepak Vohra¹ 

(1)Apt 105, White Rock, British Columbia, Canada

When data is stored in HBase, a version (also called a timestamp ) is required for each value stored in a cell. The timestamp is created automatically by the RegionServer or may be supplied explicitly. By default, the timestamp is the time at the RegionServer when the data was written. Alternatively, the timestamp may be set explicitly. Timestamps are stored in descending order in an HFile, which implies the most recent timestamp is stored first. The timestamp identifies a version and must be unique for each cell. A {row, column, version} tuple specifies a cell in a table. A KeyValue