8. Elastic and instance pools

Azure SQL Database has two deployment options, a single database and an elastic pool. A single SQL database is an isolated, standalone database with dedicated resources (DTU or vCore). In all of our previous chapters, we have talked about Azure SQL Database single-database deployments.

An SQL elastic database pool is a group of two or more SQL databases with shared resources (eDTU and vCore) at a specific price.

In a multi-tenant scenario where there's one database for each customer, each database has a varying access pattern with different peak times and low average utilization. We'll see later in the chapter how grouping different customer databases in an SQL Database elastic pool saves costs without affecting ...

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