Fault-Tolerant Reliable Delivery of Messages in Distributed Publish/Subscribe Systems

Reliable delivery of messages is an important problem that needs to be addressed in distributed systems. In this paper we briefly describe our basic strategy to enable reliable delivery of messages in the presence of link and node failures. This is facilitated by a specialized repository node. We then present our strategy to make this scheme even more failure resilient, by incorporating support for repository redundancy. Each repository functions autonomously. The scheme enables updates to the redundancy scheme depending on the failure resiliency requirements. If there are N available repositories, reliable delivery guarantees will be met even if N-1 repositories fail.