You can upgrade from version 15.5 and later of a nonclustered Adaptive Server to version 15.7 of the Cluster Edition.
Upgrade Adaptive Server using the Adaptive Server plug-in or sybcluster, or manually.
If your server has replicated databases, consult the Replication Server Configuration Guide before starting the preupgrade tasks.
Only upgrades to and from the same page size are supported. Use sybmigrate to re-create the schema and load data from one page size to another. See the Utility Guide.
To upgrade from a shared-installation mode to a private-installation mode in Adaptive Server Cluster Edition, see Upgrading to a Private Installation.
Adaptive Server version 15.7 ESD #2 includes both new and changed system catalogs that may affect your existing applications. See the Adaptive Server Enterprise New Feature Guide for a complete list. Sybase recommends that you do not use the new features until you are committed to staying with 15.7.