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From Apache Wiki <>
Subject [Cassandra Wiki] Update of "DataModel" by AmichaiRothman
Date Sun, 07 Mar 2010 20:58:33 GMT
Dear Wiki user,

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The "DataModel" page has been changed by AmichaiRothman.
The comment on this change is: clarified columns vs. super columns using maps.


  So far we've covered "normal" columns and rows.  Cassandra also supports super columns:
columns whose values are super columns; that is, a super column is a (sorted) associative
array of columns.
+ One can thus think of columns and super columns in terms of maps: A row in a regular column
family is basically a sorted map of column names to column values; a row in a super column
family is a sorted map of super column names to maps of column names to column values.
  A JSON description of this layout:

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