Electrical computers and digital data processing systems: input/ – Input/output data processing – Input/output command process
Reexamination Certificate
2011-04-12
2011-04-12
Park, Ilwoo (Department: 2182)
Electrical computers and digital data processing systems: input/
Input/output data processing
Input/output command process
C710S039000, C710S074000, C711S161000
Reexamination Certificate
active
07925796
ABSTRACT:
Methods, systems, and computer program products for performing an input/output (I/O) operation that includes a virtual drain. According to one aspect, the subject matter described herein includes a method for performing an input/output operation that includes a virtual drain. The method includes receiving a request to perform a consistent operation involving a storage entity, and in response to receiving the request: arresting write requests to the storage entity; performing a virtual drain, where performing a virtual drain includes identifying, and indicating as deferred, pending writes to the storage entity; performing the consistent operation; releasing write requests to the storage entity; and processing each deferred write using information that is associated with the write and that describes the context in which the write request was accepted.
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Bailey C. Christopher
Burriss Michael L.
de Forest Miles Aram
Duprey Dennis
Taylor Alan L.
EMC Corporation
Jenkins Wilson Taylor & Hunt, P.A.
Park Ilwoo
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