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Logically Sequential Data Access Method

Keywords:

N.A. Levin, V.I. Munerman


In the article concepts of a file and record are specified. The factor of activity of the data as the quotient of number of processable records to the number of all records in a file is defined. Mass data processing is defined as processing at which factors of activity of all processable files it is close to unit. The sequential access method to files is characteristic for mass data processing. It is named logically sequential data access method. It allows taking into account difference of ways of a data structure and access to them in various DBMS and data warehouse. Examples of tasks which are expedient for solving a method logically serial processing of the data are resulted: operative statistical processing of experimental data; the task "Operational day of bank"; daily tasks of the account and planning of manufacture in modern control systems. The problem of optimization of process logically sequential data access is formulated and requirements to mathematical models of the mass data processing, providing an opportunity are defined: optimization of processes of several files joint processing, using synthesis of optimum process, or equivalent transformations; the paralleling of joint processing operations of two or more files; applications of modern object-oriented methods of designing and programming
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