File block managing system using next record header position dat

Details File block managing system using next record header position dat File block managing system using next record header position dat

1990-07-16

1992-12-08

Lee, Thomas C.

Boots, shoes, and leggings

364DIG1, 3642831, 3642612, 3642543, 3642546, 395800, G06F 1540

Patent

active

051704790

ABSTRACT:
According to the present invention, a header includes delete history data (counter) area where a delete history of the logically subsequent record header is written in. By sequentially referring to record headers by using this data, a logical storing order of records is not destroyed even if a delete instruction is executed. In addition, the header has physical position data. Accordingly, when a squeeze instruction is executed after the delete instruction, the logical storing order of records is not destroyed and an empty area in the block can be effectively utilized.

REFERENCES:
patent: 4133041 (1979-01-01), Kashio
patent: 4325120 (1982-04-01), Colley et al.
patent: 4430725 (1984-02-01), Elliott et al.
patent: 4464718 (1984-08-01), Dixon
patent: 4575827 (1986-03-01), Kulakowski
patent: 4585360 (1986-04-01), Ueda

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