Overview

A guaranteed processing sytstem produces exactly the same results (other than timing) with failures as processing would have produced without failures.

Normally when you run a Sybase CEP project or application, Sybase CEP Engine performs best-effort message processing and delivery. In other words, a failure in the system, such as a server crash or lost network connection, may cause messages to be dropped or duplicated. This best-effort processing is fine for many applications, but in some situations, you may need to ensure that every message from your originating data source reaches the final destination exactly once, with no messages dropped or duplicated. A guaranteed processing system ensures that messages are processed exactly once, completely, in order, and with resiliency to failure.

• Sybase CEP Engine Application Components
  For an application to achieve guaranteed processing, every system component must handle the logic and communication with its neighbor components that ensure guaranteed delivery.
• Guaranteed Processing Implementation
  Guaranteed processing has different requirements for implementation based on the different components of an application. Sybase CEP Engine, adapters, and the source and destination of messages all affect the requirements.