Hickman Palermo Truong & Becker LLP
Providing the latest version of a data item from an N-replica set
Less-restrictive techniques are provided for ensuring that replicated-data systems will never provide out-of-date version of data items. A replicated-data system maintains a version number, a membership group identifier, and a membership count, with each replica of a data item. These values are maintained in such a way as to allow the replicated-data system to reliably satisfy some read requests even though half, or less than half, of the replicas of the data item are available.
Oracle International Corporation
Y G Y Y
Y10S G06F Y10S Y10S
additional inventional additional additional
Sameer Alok K. Ken
Joshi Srivastava Lee