Pro Easily scalable
Openshift uses the PaaS instance/dyno model. It allows developers to deploy their code to a specified number of dynos. Each of these dynos is pre-configured to run a piece of the application that is hosted on them. For example, some of them can access the database, others can respond to HTTP requests or process background processes.
Developers can define their processes and assign them a different task, this gives them granular control over their hosting service and performance of the application.
Pro Can be used to introduce specialized tasks through the application hosted on it
Because of its high flexibility and customization power, OpenShift can be used to create specialized tasks for the application being hosted on it. For example, an entire array of dynos (also known as gears) can be dedicated to media transcoding in order to build a custom media converter infrastructure.