D365-FO for Performance Engineers (1-Architecture)

https://docs.microsoft.com/en-us/dynamics365/fin-ops-core/fin-ops/imp-lifecycle/architecture-overview?toc=/dynamics365/commerce/toc.json

 

What contains inside a FO Environment:

Backoffice:

Application Object Server (AOS)

Batch AOS Server

BO - database

Dynamics 365 Commerce

POS  and ECOMM

They consist of a CSU-Cloud Scale unit

one CSU contains 

App Server 

Database Server

** Data and setup required moves to and fro from Channel [CSU DB] to BO(Backoffice DB) through Scheduled jobs

Management Reporter

 

Tier1: SQL Server

>Tier1:Azure SQL Database

 

Tier-1 vs. Tier-2 and higher

Tier-1	Tier-2 and higher
Single-box environment	Multi-box environment
All components are installed on the same server. These components include Application Object Server (AOS), the database, Dynamics 365 Commerce, and Management Reporter.	Components are installed on multiple servers.
Microsoft SQL Server is used.	Azure SQL Database is used.
The architecture differs from the architecture of the production environment to maximize efficiency and cost of the development team.	The architecture is the same as the architecture of the production environment, even though this type of environment has a different sizing and isn't enabled for disaster recovery.
The environment can be cloud-hosted, or it can be deployed as an environment image (VHD).	The environment can be deployed only as a standard environment or an add-on environment. It can't be cloud-hosted.
The environment isn't suitable for UAT or performance testing.	The environment is suitable for UAT and performance testing.