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From Apache Wiki <>
Subject [Cassandra Wiki] Update of "API" by JonathanEllis
Date Wed, 13 Jan 2010 21:03:41 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Cassandra Wiki" for change notification.

The "API" page has been changed by JonathanEllis.


   Keyspace:: Contains multiple Column Families.
   CF:: !ColumnFamily.
   SCF:: !ColumnFamily of type "Super".
-  Key:: A unique value that identifies a row in a CF.
+  Key:: A unique string that identifies a row in a CF.  For clarity, rows are always identified
by keys; columns are identified by names.  Note that Thrift's Java code [i.e., Cassandra server]
assumes that Strings are always encoded as UTF-8, but if you are using a non-Java client,
you may need to manually encode non-ascii strings as utf8 first.  (This is the major place
Thrift does not support interoperability between different platforms well.)
+  Column:: A tuple of name, value, and timestamp; names are unique within rows.
  == Exceptions ==
   NotFoundException:: A specific column was requested that does not exist.

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