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Change Management and Rollback

The Revision Control System (RCS) is one of the most widely used configuration management tools. RCS can be used for version control of many types of files, including tables. Most NoSQL operators can utilize tables that are under RCS control by using a command like:

       co -p table | getrow  ... | getcolumn  ... | prtable

This checks out a table, sends it to 'getrow,' then to 'getcolumn,' and finally prints the data with 'prtable'. In general, any needed series of commands can be constructed to do a given task regardless of whether the tables are checked into RCS.

The Concurrent Versioning System (CVS) takes RCS concepts one step further, providing distributed, client-server access to NoSQL tables. A CVS-managed collection of NoSQL tables can be seen as a kind of Distributed Relational Database Architecture (DRDA). And one that also provides for disconnected operations!