A rolling upgrade involves upgrading multiple OneSpan Authentication Server instances while keeping the authentication service alive. Environments that require a rolling upgrade typically support high-availability services, where the authentication service absolutely cannot be taken offline.
An environment that requires a rolling upgrade typically has the following characteristics:
There are multiple instances of OneSpan Authentication Server running on multiple servers.
All OneSpan Authentication Server instances either use the same database as their data store, or each one instance has its own data store.
The OneSpan Authentication Server upgrades involved will require a database schema update.
User load distribution between all OneSpan Authentication Server instances is managed by a third-party application.
Before you proceed with a rolling upgrade, you must first address the different usability and load management issues involved.