Reliability with CORBA Event Channels X. Defago, P. Felber, B. Garbinato, and R. Guerraoui This paper presents a pragmatic way to build a Reliable CORBA Event Service. Our approach is pragmatic in the sense that, rather than building the service from scratch, we show how to obtain it, through a simple transformation, from any standard (unreliable) CORBA 2.0 Event Service. Our extension does not introduce any modification to the CORBA specification, nor any communication overhead. The Reliable CORBA Event Service provides the adequate semantics for building reliable notification-based applications, and an interesting light-weight and open alternative to existing group oriented systems.