Storing data in the data serving layer

Once the data is processed in the data lake, it needs to be served to the downstream applications or stakeholders. The following figure shows the interaction between different data lake layers and the data serving layer:

Figure 4.7 – The interaction of other data lake layers with the data serving layer

Let's investigate the different datastores that we can use in the data serving layer to enable these services.

The following figure maps how the different datastores can be utilized using different technologies:

Figure 4.8 – Mapping the data serving layer to different technologies

Now, let's move on to cover SQL-based serving.

SQL-based serving

Relational Database Management Systems (RDBMSes) have been used to store structured data for many decades. They still have their place in the context of modern data analytics. Structured Query Language (SQL), the language...