Here we build on the end of lecture 5 and start to think about new kinds of platform services that can make a system more autonomic.

One, inspired by lecture 5, would be a system-wide fault detection service.� We�ll build one later in the course.� Then we talk about other autonomic services.

Gossip is a powerful tool in building such services.� We introduce gossip and show how it can be used to send event notifications (such as �node A has crashed�) very robustly.�