Major Description
ICP is broken in all the releases and master, but we have options for that: inter-colo peering to use the parent.config, local network peering to use the cluster.
refer to the official docutments for parent.config and cluster howto.
http://icp.ircache.net/
The ICP implementation in Traffic Server broke when epoll() was introduced. Its still an interesting and used feature in caches:
- when a caching layer of several boxes are used ICP helps to reduce disparities when a client is not routed to the same cache on subsequent requests
- after a restart, it can help reduce the time spent in a cold cache situation
