| Leaving a Cluster
When leaving a cluster, a cluster member will send a ClusterExit message to all other members in the cluster, notifying them of its intent to leave the cluster. The exiting cluster member does not wait for any responses and immediately proceeds to shutdown all resources and close all connections managed by the cluster software.
Sending a message to the other systems in the cluster when leaving saves the other systems from discovering the absence and having to go though a regroup effort to reestablish cluster membership.
Summary
At the time of writing, we have a fully functional implementation of the first phase in beta test. We have modified the base operating system, and built a foundation on which to add features over the next several years. We have attempted to follow the principles of a “shared nothing” cluster model throughout the design. In the process we have gained a tremendous amount of insight into the problems of loosely coupled distributed systems that will be applied to future releases of our product.
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