Electrical computers and digital processing systems: multicomput – Multicomputer data transferring via shared memory
Reexamination Certificate
2006-09-12
2006-09-12
McLean-Mayo, Kimberly (Department: 2187)
Electrical computers and digital processing systems: multicomput
Multicomputer data transferring via shared memory
C709S203000, C709S232000, C709S235000, C711S147000, C711S151000, C711S150000, C707S793000
Reexamination Certificate
active
07107319
ABSTRACT:
A method and apparatus are provided for improving the performance associated with transferring a data item and obtaining a lock in a multi-node system by interpreting the block transfer message as a lock grant message. Typically when a Holder of a data item transfers a data item (e.g. block) to a Requestor of that data item, the Holder will down-convert its lock for that data item and send a message to the Master of this data item indicating that a down-convert has been performed. Subsequently, the Master sends a lock grant message to the Requestor of the data item to inform the Requestor that it has been granted a lock for the data item. By interpreting the block transfer message as a lock grant message, the down-convert message and the lock grant message can be eliminated, which results in improved performance.
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Bamford Roger J.
Brower David
Chandrasekaran Sashikanth
Brokaw Christopher J.
Hickman Palermo & Truong & Becker LLP
McLean-Mayo Kimberly
Oracle Corporation
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