Outage-less database change operation

Details Outage-less database change operation Outage-less database change operation

2003-07-11

2010-10-05

Alam, Hosain T (Department: 2166)

Data processing: database and file management or data structures

Database design

Database and data structure management

Reexamination Certificate

active

07809762

ABSTRACT:
Techniques to update/change a database without incurring a user outage include receiving a user-specified change command which is then evaluated to determine which portion(s) of the target database will change as a result of the command. Shadow copies of those portions are then created and updated in accordance with the change command. The change command is next applied against the target database and any portion(s) placed in a restricted status because of this action are reset to an un-restricted state. The updated shadow portion(s) are then swapped for the corresponding portion(s) of the target database.

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