An older blog post on the Varnish site says this: "... you can emulate ICP-like behaviour by writing VCL code to check your neighouring cache for the request that you are looking for. Setups like these have been discussed on varnish-misc<http://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc/>several times and implementing it should be fairly simple."
I must be searching the wrong terms, because I can't find any descriptions of this. It looks to me like the setup would be little more than setting the peer as a backend and then setting req.hash_ignore_busy on one of the servers to avoid race conditions, as described on the wiki. Is there anything I'm missing, or does someone have a reference on how to set this up? Any help is appreciated.
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