1. SQL DB Elastic Pools for SaaS
Morgan Oslake
Principal Program Manager

2. SaaS app design patterns
Isolated
Shared
Shared schema
Schema per tenant
Database per tenant
Benefits of single database per tenant
Performance management
Business continuity flexibility
Security isolation
Reduced app dev complexity

3. SaaS app usage patterns
Many databases for one app arising from single database per tenant.
Unpredictable usage of databases each peaking at different times.
Need to avoid costly overprovisioning of resources for each database.
Need to ensure a quality performance experience for each database.
Performance level
Price ($/month) S0
$15 S1
$30 S2
$75 S3
$150
20x S3 databases
$3,000

4. SQL DB elastic pool solution
“SQL DB elastic pools provides SaaS providers a simple cost effective solution to achieve performance goals for a group of databases with unpredictable usage patterns.” 
Elastic pool resource allocation
Database Transaction Units (DTUs) are a measure of compute capacity which is shared across databases in the pool.
DTUs needed for the pool is determined by the aggregate utilization of all its concurrently active databases.
Elastic pool performance settings
Choose DTUs for the pool
Choose DTU max per database
Choose DTU min per database
Elastic pool pricing
Pay for DTU of the pool. DB
DTU of pool
DTU min per database
DTU max per database …
DTU utilization of database
DTU utilization of pool
DTU

5. Demo Microsoft Connect 2016 7/2/2018 9:50 AM
© 2016 Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

6. Summary
Elastic pools simplify performance management for multiple databases especially when usage patterns are unpredictable.
Elastic pools can significantly reduce the cost of multiple databases and provide a convenient way to control the budget.
Elastic pools are ideal for SaaS apps that provision a single database per tenant to get isolation benefits.

7. Getting started Documentation
Pricing
Portal
PowerShell