Format conversion of storage data using an efficient division of

Details Format conversion of storage data using an efficient division of Format conversion of storage data using an efficient division of

1996-04-18

1999-10-05

Von Buhr, Maria N.

Data processing: database and file management or data structures

Database design

Data structure types

707103, 707201, G06F 1700

Patent

active

059639377

ABSTRACT:
A database apparatus to realize faster processing for data including a plurality of elements such as objects by conducting the loading and storing process accompanying format conversion only on necessary elements. Objects in storage format in the secondary memory apparatus are written as computable format onto the cache for processing by the application program. In addition, objects in computable format in the cache are written out as storage format on the secondary memory apparatus. A first determination device determines whether invalid or valid elements are contained in at least a portion of the object held in the cache based on status information that is held in the cache. Based on the results of this determination, a second determination device determines which elements in the object are invalid or valid and for invalid elements, the corresponding elements held in storage format are converted to computable format by the loading means and written into the cache while valid elements are converted to storage format by the storage device and written out to the page cache. Furthermore, the reading and writing device writes these out to the secondary memory apparatus.

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"Linear Hashing: A New Tool For File And Table Addressing", Witold Litwin; 1980 IEEE, pp. 212-223.
"Working With Persistent Objects: To Swizzle Or Not To Swizzle", J. Eliot B. Moss, IEEE Transactions on Software Engineering, vol. 18, No. 8, Aug. 1992 657-673.

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