Caché Upgrade Checklists - InterSystems Documentation

Upgrading CachéThe application servers should be upgraded to the new version first. Once all application servers have been upgraded,the database servers can be serially upgraded.If your database or application servers hold local transaction information until the transactions are completed, or if youhave questions or concerns about how to upgrade your ECP configuration, please contact InterSystems Worldwide CustomerSupport (WRC).1.1.4 Compatibility With Earlier VersionsInterSystems strives to assure that applications written for a version of Caché will run without change on subsequent versions.While this is not always possible (and therefore the reason for this document), the reverse is not true.CAUTION:In general, InterSystems does not support moving an application developed for version X to a version priorto X. This applies to both source and compiled versions of the application. Exceptions to this are few andexplicitly noted.Customers writing an application that will be deployed on multiple versions of Caché should design and develop theapplication to use only the features on the earliest of the intended versions.Caché Upgrade Checklists 5