Automatic adjustment of the quantity of prefetch data in a disk

Details Automatic adjustment of the quantity of prefetch data in a disk Automatic adjustment of the quantity of prefetch data in a disk

1981-06-05

1984-12-18

Thomas, James D.

Boots, shoes, and leggings

G06F 906, G06F 1300

Patent

active

044893787

ABSTRACT:
When transferring data to a cache memory from an attachment data storage device, additional unrequested information can be transferred at the same time if it is likely that this additional data will soon be requested. The average quantity of data transferred to the cache memory in each operation can be automatically and continually varied in order to maximize the performance advantage provided by the cache memory. When a record of data is requested by the host processor, data is transferred to the cache memory from an attachment data storage device in increments of fixed-length data blocks each containing a sequence of data records, with the number of transferred blocks being determined by the position of a requested data record in its respective data block, and the average number of blocks transferred in any one operation being varied by adjusting threshold position values at which second or third data blocks are transferred.

REFERENCES:
patent: 3588829 (1971-06-01), Boland et al.
patent: 3588839 (1971-06-01), Belady et al.
patent: 3670309 (1972-06-01), Amdahl et al.
patent: 3898624 (1975-08-01), Tobias
patent: 4084229 (1978-04-01), Taylor et al.
patent: 4086629 (1978-04-01), Desyllas et al.
patent: 4189770 (1980-02-01), Gannon et al.
patent: 4214303 (1980-07-01), Joyce et al.
patent: 4219883 (1980-08-01), Kobayashi et al.
patent: 4246637 (1981-01-01), Brown et al.
patent: 4315312 (1982-02-01), Schmidt
patent: 4399503 (1983-08-01), Hawley
patent: 4407016 (1983-09-01), Bayliss et al.
IBM Technical Disclosure Bulletin, vol. 21, No. 6, Nov. 1978, pp. 2468-2469, Data Processing System With Second Level Cache, F. J. Sparacio.
Electronic Design, Oct. 25, 1980, pp. 38-40, Cache Memory Makes a Hit by Processing I/O Data Quickly, T. Williams.

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