For releases 8.4 and later, the Pega zero-downtime split-schema patch scripts use a new rules schema and temporary data schema and the patch migration script moves the rules between the appropriate schemas.
For details about the difference between a major upgrade, a minor upgrade, and a patch, see Pega Platform patches.
Use the out-of-place patch process for zero-downtime patches
Complete your patch without downtime using the out-of-place patch process. Patch installation is zero-downtime and includes only rule changes observed between the patch and the current version. Patches are reversible.
While the out-of-place patch process is the recommended method, you might prefer to apply the patch in-place, which applies the patch without using the temporary data schema. In-place patchs involve down time. For details, see, Applying a patch in-place.
- Applying a patch without downtime
The Pega patch process is zero-downtime for highly available systems when you use the out-of-place process so you can continue working in your application while you patch your system.
- Applying a patch in-place
Apply a patch in-place on systems that do not require minimal downtime.
- Post-patch tasks
This section describes additional tasks to perform after the new rules schema and the existing data schema have been updated.