Scalable deployment
Overview
In a scalable deployment Email Gateway Security instances work on a shared database.
The shared database can be a single point of failure in a scalable deployment. The solution is to set up a PostgreSQL database cluster that provides high availability for the database. For details see https://www.postgresql.org/docs/current/high-availability.html.
The database runs either on one of the the Email Gateway Security instances
or as a separate database server
All (the other) instances connect to the shared database.
For details about scalable deployment see Operating/Scalable deployment operation.
Installation
Shared database on an Email Gateway Security instance
- When the shared database is intended to be on one of the Email Gateway Security instances, install this instance first.
- In the Choose Database Setup Type dialog select the Standalone option and complete the setup of the first instance.
- For all other instances in the Choose Database Setup Type dialog select the External database option.
- In the database properties dialog set the Address and Port of the first instance and provide the database Username and Password set for the first instance.
Shared external database
- The shared database must be up and running before the first Email Gateway Security instance is about to be installed.
- For all instances in the Choose Database Setup Type dialog select the External database option.
- In the database properties dialog set the Address and Port of the shared external database server and provide the shared database Username and Password.
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