HBase is a sparse, distributed, persistent multidimensional sorted map. The map is indexed by a row key, column key, and a timestamp; each value in the map is an uninterpreted array of bytes. Applications store rows in labelled tables. A row has a sortable key and an arbitrary number of columns. All rows are sorted in strict alphabetical sequence.
The noun NORM has 2 senses: 1. a standard or model or pattern regarded as typical. 2. a statistic describing the location of a distribution. Familiarity information: NORM used as a noun is rare.
Mandatory means you have to follow some rules , compulsory tends to have a feeling of something not yet being started or finished , so it 's compulsory that you must do something , because they are the rules , and also it 's one thing related to another , like if you 're 16 in a country where they have national service , it 's compulsory for you to ...