Apparatus and method for transferring information in blocks from

Details Apparatus and method for transferring information in blocks from Apparatus and method for transferring information in blocks from

1992-08-03

1995-08-29

Kulik, Paul V.

Boots, shoes, and leggings

395600, 364DIG1, 3642434, 364243, 3642466, 3642468, G06F 1208, G06F 1212

Patent

active

054468582

ABSTRACT:
A method, system and process for providing an improved database blocking technique for updatable and scrollable cursors is disclosed. The invention is facilitated by the operation of a process in the memory of a processor. The processor, under the control of the process, builds a reserved area in the memory of the computer. The reserved area in the memory contains an image of a portion of the information residing on disk in the database. When an application opens a cursor to a database, the type of blocking is specified for that cursor. The application issues a fetch request, and if the row is not in the block in the reserved area in the memory, then a remote procedure call is performed to get the required next block of rows and return the block containing the rows back to the application. Various lock data structures are employed to manage and control the processing.

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Smith, Alan Jay, "Cache Memories," Computing Surveys, vol. 14, No. 3, Sep. 1982, pp. 473-529.

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