The deployment policy defines the deployment process of apps on Zend Server. Depending on your business requirements and limitations, you can choose between Hot and Cold deployment.
Recommended when you wish to have a seamless application update. The app is deployed on your servers without any restart. As a result, end-user sessions that started at application version X may continue at version X+1. Should business reasons require, this can be avoided by adding a simple code using our API, to make sure sessions do not switch versions during Hot Deployment. Note that first deployment of applications always restart your servers.
Guarantees atomic application update. This dictates that all servers go through a restart process. Consider using this policy when major application changes are introduced. The down side is losing end-users' sessions, while the restart is taking place. Note that the restart will take place according to the restart strategy configuration