RAPID DEVELOPMENT OF DISTRIBUTED WEB SERVICE

Development tools and a methodology for efficient development of distributed web services. A tool tracks changes in packages used to create images deployed for testing. Rather than build a complete image for each change, a current image may be created by substituting changed packages in a previously created image. Another tool allocates components of an image to a number of servers specified by a user of the tool. Such a tool simplifies integration testing of the web service by allowing a developer to initially test a web service on a single server or a small number of servers and then easily scale-up the test environment. The servers may be physical servers or may be virtual servers. Interface rules for packages that constitute the software for the web service are defined to reduce the likelihood of integration problems as the environment is scaled up.