Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2005-05-19
2009-12-29
Jalil, Neveen Abel (Department: 2165)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000, C711S133000, C711S136000
Reexamination Certificate
active
07640276
ABSTRACT:
Provided is a backup method including a step (S1) of reading a log which is a data update difference, and identifying a data storage area (page) of backup data, a step (S2) of determining high/low reusability of the identified data storage area, a step (S3) of storing a log corresponding to a data storage area determined to be low in reusability in a log storage area preset on a memory, and a step (S4) of applying a log corresponding to a data storage area determined to be high in reusability to the identified data storage area in a cache area set on the memory, and updating the data storage area. Thus, by further reducing the number of I/O times in an external storage system of a standby system which backs up data by log transfer, it is possible to reduce introduction costs of a backup system and its normal-time operation's costs at normal times.
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Fujiwara Shinji
Suzuki Yoshio
Watanabe Satoru
Abel Jalil Neveen
Brundidge & Stanger, P.C.
Hitachi , Ltd.
Pulliam Christyann R
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