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System Configurator

IP.com Disclosure Number: IPCOM000083931D
Original Publication Date: 1975-Aug-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 13K

Publishing Venue

IBM

Related People

Angiulli, JM: AUTHOR [+7]

Abstract

Programmable algorithms are provided in this description, by which optimal hardware and software subsystem specifications can be derived from a user s environment (market application) requirements. The algorithms also permit the evaluation and comparison of proposed technology solutions with respect to their ability to satisfy the cost and performance requirements.

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System Configurator

Programmable algorithms are provided in this description, by which optimal hardware and software subsystem specifications can be derived from a user s environment (market application) requirements. The algorithms also permit the evaluation and comparison of proposed technology solutions with respect to their ability to satisfy the cost and performance requirements.

These algorithms form a process that maximizes the system thruput (transaction rate), subject to specified cost and response time constraints, by simultaneously varying three independent variables, viz, transactions per second, main memory size devoted to data paging, and the direct-access storage device (DASD) data path utilization.

To determine the system configuration for a specified combination of values of the independent variables, four major intermediate quantities are calculated: CPH processing power required, number of DASD boxes required to produce the necessary data rate, total main memory required, and the volume of archive storage required. Also each configuration is checked to see if it satisfies the constraints or not.

The input parameters for this process can be listed under the following two categories: application-dependent parameters, and device cost-performance parameters.

Application-dependent parameters:

a. Record transfer size for data.

b. Record transfer size for programs.

c. Instructions per transaction.

d. Main memory per multiprogramming level.

e. Systems and application program size resident in the

main memory.

f. Active data base size per transaction/second.

g. Total data base size per transaction/second.

h. Average program accesses per transaction.

i. Required average response time per transaction.

j. The access-capacity curve (in a tabular or analytical

form) as a function of the transaction rate.

The cost-performance parameters are req...