Method for minimizing locking and reading in a segmented storage

Details Method for minimizing locking and reading in a segmented storage Method for minimizing locking and reading in a segmented storage

1988-07-15

1990-10-02

Zache, Raulfe B.

Boots, shoes, and leggings

364246, 3642463, G06F 1200

Patent

active

049611348

ABSTRACT:
A page-accessing method in a segmented tablespace 10 which eliminates unnecessary reading and locking. The tablespace comprises data pages 18 grouped into identically-sized segments 16, each segment storing data for a single table. A status indicator 26 for each data page of a segment is kept in a separate segment control block 20 stored on a space map page 14. Five data page status indicator values are maintained:

REFERENCES:
patent: 4393500 (1983-07-01), Imazeki et al.
patent: 4627019 (1986-12-01), Ng
patent: 4716528 (1987-12-01), Crus et al.
patent: 4785400 (1988-11-01), Kojima et al.
W. Chu, et al., "Fault Tolerant Locking for Tightly Coupled Systems", Proceedings of the 5th Symposium on Reliability in Distributed Software and Database Systems, IEEE Computing Society Press, copyright 1986, pp. 49-55.

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