Method and system for efficiently calculating and storing...

Details Method and system for efficiently calculating and storing... Method and system for efficiently calculating and storing...

2005-02-22

2005-02-22

Portka, Gary (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S111000

Reexamination Certificate

active

06859859

ABSTRACT:
A method and apparatus are provided for command queue ordering in a direct access storage device (DASD). For each command in a command queue, an access time is calculated. Calculating the access time includes identifying a probability of miss and adding a penalty for the identified probability of miss to the calculated access time. A command in the command queue having a best access time is identified and executed.

REFERENCES:
patent: 5570332 (1996-10-01), Heath et al.
patent: 6574676 (2003-06-01), Megiddo
patent: 6604178 (2003-08-01), Hall
patent: 6681289 (2004-01-01), Espeseth et al.
patent: 6725327 (2004-04-01), Espeseth et al.

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