Electrical computers and digital processing systems: multicomput – Remote data accessing
Reexamination Certificate
2004-04-23
2010-06-15
Ismail, Shawki S (Department: 2442)
Electrical computers and digital processing systems: multicomput
Remote data accessing
C707S793000
Reexamination Certificate
active
07739352
ABSTRACT:
A system and method for facilitating a consistent point-in-time copy (PITC). A data provider offers access to data by one or more clients. A client issues a PITC request for a set of data to the data provider, or the provider initiates its own request. The data provider instructs one or more clients, particularly clients accessing the set of data, to flush any pending updates involving the files. The clients acknowledge the flush request, flush their data, and notify the data provider when their flushes are complete. Post-consistency updates are deferred (e.g., using a write-aside buffer). If a client fails to acknowledge the flush request or notify of flush completion, the data provider may abort the PITC or continue because the data may not be consistent or consistency may not be assured. If not aborted, the PITC may be marked to indicate that it is incomplete.
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McDougall Richard J.
Robinson David
Shepler Spencer
Wong Brian L.
Benoit Esther
Ismail Shawki S
Oracle America Inc.
Park Vaughan & Fleming LLP
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