The Porcupine scalable mail server

Abstract

This paper describes the design and preliminary performance of the Porcupine mail server, a clusterbased mail server that can handle up to I billion messages a day. Unlike common large-scale mail servers deployed today, there is no role separation among nodes. Each node in the cluster runs all the services supported by the cluster and balances the workload dynamically using the cluster membership information. This architecture is more available, manageable, and scalable than traditional architecture.