Page 364 - Data Architecture

Chapter 9.1: Repetitive Analytics: Some Basics

Fig. 9.1.19 Log tape records are very irregular.

Fig. 9.1.19 shows that on the log tape, many different kinds of records are found.
Typically, these records are written onto the log tape in a chronological manner. As a
business event occurs, a record is written to reflect the occurrence of the event.

At first glance, these data might look like nonrepetitive data. Indeed, from a physical
occurrence of data standpoint, that is a valid perspective. But there is another way to

look at the data found on a log tape. That perspective is that the log tape is merely a
chronological accumulation of a bunch of repetitive records. A “logical” perspective of a
log tape is seen in Fig. 9.1.20.

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