Software packaging with DAR

One of the important tasks in distributed computing is to deliver software applications to the computing resources. Distribution after Release (DAR) tool, is being used to package software applications for the world-wide event production by the CMS Collaboration. This presentation will focus on the concept of packaging applications based on the runtime environment. We discuss solutions for more effective software distribution based on two years experience with DAR. Finally, we will give an overview of the application distribution process and the interfaces to the CMS production tools.