Gamma System: Continuous Evolution of Software after Deployment
Harrold, Mary Jean
Lipton, Richard J.
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In this paper, we present the Gamma system---a new approach for continuous improvement of software systems after their deployment. The Gamma system facilitates remote monitoring of deployed software using a revolutionary approach that exploits the opportunities presented by a software product being used by many users connected through a network. Gamma splits monitoring tasks across different instances of the software, so that partial information can be collected from different users by means of light-weight instrumentation, and integrated to gather the overall monitoring information. This system enables software producers (1) to perform continuous, minimally intrusive analyses of their software's behavior, and (2) to use the information thus gathered to improve and evolve their software. We describe the Gamma system and its underlying technology in detail, and illustrate the different components of the system. We also present a prototype implementation of the system and show our initial experiences with it.