Electrical computers and digital data processing systems: input/ – Input/output data processing – Input/output access regulation
Reexamination Certificate
2008-03-11
2008-03-11
Peyton, Tammara (Department: 2182)
Electrical computers and digital data processing systems: input/
Input/output data processing
Input/output access regulation
C710S037000, C710S038000, C711S118000, C711S150000, C711S202000, C709S210000, C709S213000, C709S216000
Reexamination Certificate
active
10666773
ABSTRACT:
Described is a distributed lock processing technique that may be used to coordinate access to globally accessed resource between endpoints using the connecting message fabric. Processors in a data storage system communicate using the message switch of the message fabric. Each processor is an endpoint within a data storage system. Each endpoint, prior to requesting a lock, dynamically determines a current lock owner of the lock to be requested in accordance with a determination of which endpoints are available as lock owners at the current time. The lock request is issued to the current lock owner with a requested time period used by the lock owner to determine an expiration time. The lock expires automatically at the expiration time even if the lock holder becomes unavailable. If the current lock owner becomes unavailable, a new lock owner is determined prior to the next request for that lock.
REFERENCES:
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patent: 6510478 (2003-01-01), Jeffords et al.
patent: 6516393 (2003-02-01), Fee et al.
patent: 6986015 (2006-01-01), Testardi
Chalmer Steven R.
McClure Steven T.
Niver Brett D.
EMC Corporation
Muirhead and Saturnelli LLC
Peyton Tammara
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