Method and system for providing consistent data modification...

Details Method and system for providing consistent data modification... Method and system for providing consistent data modification...

2005-10-04

2005-10-04

Sparks, Donald (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S100000, C711S112000, C711S114000, C711S156000, C711S162000, C711S200000, C711S202000, C707S793000, C707S793000, C707S793000, C707S793000, C707S793000

Reexamination Certificate

active

06952758

ABSTRACT:
A data storage system and method for providing consistent data to multiple clients based on data modification information as existing data is updated and new data is written to the system. The information indicates the modification status of each data block and identifies which data blocks have been modified during a certain time interval. The clients may query and update the modification information by submitting requests through a request processor. The data modification information includes an Altered Block Map that indicates block modification status and a Toggle Block Map that identifies which blocks have been modified. The system further includes a Modification Counter a Pending Reset Counter for improved recognition and handling of the modified data.

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