Hi Community,
We’re planning to upgrade our on-premise Appian environment from version 23.3 to 25.3. Based on the official documentation, it appears that a direct upgrade isn’t supported, and we’ll need to follow a sequential path: 23.3 → 25.1 → 25.3.
I’d appreciate any insights on the following:
Thanks in advance for your guidance and experiences!
Best, Ramanji
Discussion posts and replies are publicly visible
ramanjireddya6526 said:Is this sequential upgrade path (via 25.1) the recommended or most stable approach?
Yes, 23.3 -> 25.1 -> 25.3 is required since 25.3 requires minimum version 23.4, making the intermediate step mandatory.
ramanjireddya6526 said:For those running Appian in a High Availability (HA) setup, how did you manage the upgrade across multiple instances?
Use rolling upgrades -> take one node offline, upgrade it, validate, bring it back, then proceed to next node while maintaining service availability.
ramanjireddya6526 said:Were there any challenges or performance impacts during the production upgrade, especially related to backup/restore of large volumes of data?
Expect 2-4+ hour downtime for database schema migrations on large datasets and potential plugin compatibility issues with each version jump.
ramanjireddya6526 said:Any lessons learned or best practices you’d recommend to ensure a smooth upgrade?
Test the exact sequential upgrade path (23.3 -> 25.1 -> 25.3) in a production-clone environment and maintain full backups at each step.