Upgrade Overview

Upgrading AEM is a multi-step, sometimes multi-month process. The following outline has been provided as an overview of what is included in an upgrade project and the content that has been included in this documentation:

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Upgrade Flow

The diagram below captures the overall recommended flow highlight the upgrade approach. Note the reference to the new features that Adobe has introduced. The upgrade should start with the Pattern Detector(see Assessing the Upgrade Complexity with Pattern Detector) which should let you decide the path you want to take for compatibility with AEM 6.4 based on the patterns in the generated report.

There was a significant focus in 6.5 to keep all the new features backward compatible, but in cases where you still see some backward compatibility issues, the compatibility mode lets you temporarily defer development to keep your custom code compliant with 6.5. This approach helps you avoid development effort immediately after the upgrade(see Backward Compatibility in AEM 6.5).

Finally, in your 6.5 development cycle, features introduced under Sustainable Upgrades(see Sustainable Upgrades) help you follow best practices to make future upgrades even more efficient and seamless.

6_4_upgrade_overviewflowchart-newpage3

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