Welcome to the Zend Server 2020.0 Installation Guide.
Zend Server 2020.0 can only be installed on IBM i.
Zend Server 2020.0 support upgrades from version 9.1 and up. Upgrading from earlier versions (e.g. versions 7.x, 8.x, 9.0) is not supported!
If you have an earlier version of Zend Server on the target system, please run a parallel install, migrate your configuration and applications from the active instance to the new instance, then test accordingly before placing the new instance in production.
If you cannot run a parallel instance, you need to remove the earlier version before installing 2020.0.
Need to install an older version?
If you're using an older version of Zend Server, kindly refer to the relevant link below: