Oracle Event Processing provides several HA adapters out of the box to allow you to create HA capable applications with different levels of precision and performance. After having understood Oracle Event Processing HA architecture, the next step is to learn Oracle Event Processing HA adapters and how to configure your desired quality of service.
Oracle Event Processing supports four active/active HA options with different quality of service (QoS) as follows:
Simple failover
Simple failover with buffering
Light-weight queue trimming
Precise recovery with JMS
These are detailed in the next sub-sections.
When configured for simple failover, there is negligible performance degradation, however your application may lose many events in case of a failure, and may receive a few duplicate events while recovering.
To configure for simple failover, you need to follow these steps:
Add a
ha-buffering
adapter to your EPN downstream to your output adapter. This...