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Author Piepmeier, William F.
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Language English
Subject Keyword System evaluation ♦ Balancing ♦ Disk drive hierarchies ♦ Input/output ♦ Scheduling ♦ Modeling ♦ Queueing theory ♦ Device assignment
Abstract Determining a policy for efficient allocation and utilization of a set of disk drives with differing operational characteristics is examined using analytical techniques. Using standard queueing theory, each disk drive is characterized by a queueing model with service time of a disk drive represented by the probability density function of the sum of two uniform distributions. Total response time of the set of disk models is then minimized under varying load conditions. The results indicate that faster devices should have higher utilization factors and that the number of different device types utilized tends to decrease with decreasing load. Specific examples using 2314 and 3330 combinations are examined.
Description Affiliation: Washington Univ., Saint Louis, MO (Piepmeier, William F.)
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2005-08-01
Publisher Place New York
Journal Communications of the ACM (CACM)
Volume Number 18
Issue Number 9
Page Count 4
Starting Page 524
Ending Page 527

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Source: ACM Digital Library