The initial release of Sitecore 9.3 has brought a number of improvements to its architecture. With Sitecore 9.3, there are numerous components and databases — and it’s really helpful to see the communication flows / scalability of the components. Before viewing the diagram, it is good to understand the different Sitecore roles, xConnect application roles, and databases that are involved:
Sitecore roles:
Content Delivery
Content Management (with EXM Dispatch)
Processing
Reporting roles
xConnect application roles:
Collection API
Collection Search API
Marketing Operations API
Marketing Reporting API
Reference Data API
Search Indexer Job
Marketing Engine Job
Sitecore Cortex Processing Engine
Sitecore Cortex Blob Storage service
Sitecore Cortex Table Storage serviceSitecore Cortex Reporting service
Universal Tracker Collection service
Universal Tracker Processing server
Additional Components:
Sitecore Identity Server (SIS).
Databases:
Core
Master
Web
Experience Forms
Reporting
Processing.Pools
Processing.Tasks
ProcessingEngineStorage
ProcessingEngineTasks
Universal Tracking database
ReferenceData
Messaging
Marketing Automation
ShardMapManager
Shard0
Shard1
Additionally:
Please note that the diagram shows which components can be scaled horizontally. It does not include the database scalability options — as I assumed it to be a “highly available” database whether it exists on a single server or multiple database servers.
The Solr component can be replaced with Azure Search component as needed.
We cannot set up multiple instances of SIS behind load balancer due to encrypted cookie that can only be decrypted by the instance of SIS that encrypted/issued that cookie.
We can set up Content Publishing component on separate server to support publishing, which is not shown in this piece.
1. Cortex Communication Flow
2. XConnect Analytics Communication Flow
3. Universal Tracker Collection Communication Flow
4. XConnect Reference Data Communication Flow
5. XConnect Collection & Indexer Communication Flow
6. XP Processing Server Communication Flow
7. XP Reporting Communication Flow
8. XP CM Communication Flow
9. XP CD Communication Flow
As you can see in the diagram, you can have the following:
Multiple Content Delivery servers
Multiple Content Management servers
Multiple Processing servers
Multiple Reporting servers
Multiple Solr servers
Multiple xConnect Search API servers
Multiple xConnect Collection API servers
Multiple xConnect Reference Data service API servers
Multiple xConnect Marketing Automation Reporting API servers
Multiple xConnect Marketing Automation Operations API servers
Multiple xConnect Marketing Engine Jobs
Multiple xConnect Universal Tracker Processing service servers
Multiple xConnect Universal Tracker Collection service servers
Multiple xConnect Sitecore Cortex Reporting service
Multiple xConnect Sitecore Cortex Table Storage service
Multiple xConnect Sitecore Cortex Blob Storage service
You can scale each of these components individually to suit your application needs. This provides a highly scalable Sitecore 9.3 architecture. I hope you find it helpful, and feel free to comment and let me know if there is anything misrepresented in here.