Thus, born was the data warehouse, as seen in Fig. 1.7.7.

Fig. 1.7.7 Data warehouse architecture.

With the data warehouse came what was called the single version of the truth or the
system of record. With the single version of the truth, the organization now had a
foundation of data that the organization could turn to with confidence.

The volumes of data continued to explode with the advent to the data warehouse. Prior to
the data warehouse, there was no convenient place to store historical data. But with data
warehouse, for the first time, there was a convenient and natural place for historical data.

Parallel Data Management

It is normal and natural that with the ability to store large amounts of data, the demand
for data management products and technology skyrocketed. Soon, there emerged an
architectural approach called the parallel approach to data management.

Fig. 1.7.8 illustrates the parallel approach to data management.

Chapter 1.7: A Brief History of Data