How scalable Camunda is, compared to Zeebe?

I know that Zeebe is the process automation engine powering Camunda Cloud. The first thing marketed about the Zeebe is the “Horizontally Scalable Workflow Orchestration” (at least what I get to read while searching for Zeebe).

Is Camunda not Horizontally Scalable? What about running around 3 instances of Camunda connecting to the same MySQL DB?

The bottleneck in camunda is the process DB. If you manage to make it wide enough (for your application profile) you’ll hardly have any problems.

Hi
One way to horizontally scale Camunda is to partition or shard your application. However this requires your application to become shard aware. Zalando have successfully used this approach…

regards

Rob