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The following page has been changed by EvgenyRyabitskiy:
http://wiki.apache.org/hadoop/Hbase/DesignOverview
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Applications store data rows in labeled tables. A data row has a sortable row key and an arbitrary number of columns. The table is stored sparsely, so that rows in the same table can have widely varying numbers of columns.
- HBase is three dimensional sorted map. It maps from Cartesian product of row key, column key and timestamp to cell value:
+ HBase table is three dimensional sorted map. It maps from Cartesian product of row key, column key and timestamp to cell value:
- (row:byte[] x column:byte[] x timestamp:Long) -> byte[]
+ '''(row:byte[] x column:byte[] x timestamp:Long) -> byte[]'''
A column name has the form ''":