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Patching systems without downtime (Pega 8.4 and later)

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 software maintenance and extended support policy.

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, some clients 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.

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