Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2005-06-21
2005-06-21
Ali, Mohammad (Department: 2167)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000
Reexamination Certificate
active
06910054
ABSTRACT:
Methods, systems and computer program products for storing data that use a rolling window file that maintains a defined file size while sequentially replacing an oldest portion of previously stored data with new data are provided. The rolling window file operates without the use of a wrap buffer implemented through manipulation of a current offset pointer by moving a first storage region in a sequentially linked plurality of storage regions associated with the rolling window file to become the new last (or end of file) storage region associated with the file. Newly received data may then be stored in the newly designated end of file storage region. Operations moving the first region in the linked sequence to the last position can repeat theoretically indefinitely as new data is received. Accordingly, a fixed file length saving only the most recent data may be provided without ever reallocating the regions, such as clusters of data under a file access table type file systems, that are originally associated with the rolling window file.
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Herbst Joseph Martin
Yarborough Joel Mark
Ali Mohammad
International Business Machines - Corporation
Ray-Yarletts Jeanine S.
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