Electrical computers and digital processing systems: multicomput – Multicomputer synchronizing
Reexamination Certificate
2007-06-12
2007-06-12
Etienne, Ario (Department: 2157)
Electrical computers and digital processing systems: multicomput
Multicomputer synchronizing
C709S221000, C709S236000
Reexamination Certificate
active
09952392
ABSTRACT:
An apparatus, program product and method to synchronize group state data in a primary-backup group in connection with the rejoining of a member to the primary-backup group in a clustered computer system. Each member in the group includes a copy of replicated group state data for the primary-backup group. In connection with rejoining the member, it is determined whether the rejoining member is the primary member for the primary-backup group. Then, a selection is made between member and group overwrite operations based upon such determination. The member overwrite operation includes overwriting the copy of the replicated group state data for the rejoining member with data from the copy of the replicated group state data for an existing member in the primary-backup group. The group overwrite operation includes overwriting the copy of the replicated group state data for the existing member in the primary-backup group with data from the copy of the replicated group state data for the rejoining member.
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Laschkewitsch Clinton Gene
Miller Robert
Morey Vicki Lynn
Williams Laurie Ann
Etienne Ario
Gold Avi
International Business Machines - Corporation
Wood Herron & Evans LLP
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