An Algorithm for Blocking Factor Optimization.

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Abstract:

This report describes a performance enhancement study carried out to examine the impact of blocking factors on program run time in a fixed partition environment. Initial analysis is described to determine blocking factor behavior. The results of this analysis forms the basis for the development of a performance enhancement utility routine to automatically predict the best blocking assignment for tape and sequential disk files to minimize program run time. The derivation of the appropriate mathematical optimization algorithm and the underlying assumptions inherent in the algorithm are explained. Summary results and typical time savings from the use of the algorithm are provided to indicate the increase in resource utilization that can be realized from implementing the routine. Detailed procedures on how to use this tool are also provided. Author

Author(s):
Pickard, Larry A. ; Raines, Marvin D.
Author Organization(s):
ARMY COMPUTER SYSTEMS COMMAND FORT BELVOIR VA
Descriptive Note:
Final rept.,
Pagination:
0040

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
USACSC-AT-75-03
Task Number(s):
SX865803MY1002
Project Number(s):
DA-SX-865803-MY-10
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*FILES(RECORDS), *BLOCKING, *MAGNETIC TAPE, *MAGNETIC DISKS, ALGORITHMS, OPTIMIZATION, SEQUENTIAL ANALYSIS, MATHEMATICAL PREDICTION, CENTRAL PROCESSING UNITS, DIGITAL COMPUTERS, SERIAL PROCESSORS
Field(s)/Group(s):
Computer Hardware, Computer Systems Management and Standards
Keyword(s):
IBM 360 computers, *Blocking factors, Performance monitoring, *Sequential files, *Computer performance evaluation
Report Date:
1975 Jul 01