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The following page has been changed by EvgenyRyabitskiy:
http://wiki.apache.org/hadoop/Hbase/DesignOverview
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[[Anchor(datamodel)]]
= Data Model =
- 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.
+ 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 a timestamp to cell value:
+
+ (row:byte[] x column:byte[] x timestamp:Long) -> byte[]
A column name has the form ''":