Disadvantages to rack-cache vs. Varnish in Heroku cedar stack?
问题 The previous 2 Heroku application stacks came with a Varnish layer which automatically reverse-proxy-cached content based on http headers. The new Heroku cedar stack doesn't have this Varnish layer. Heroku suggests using rack-cache and memcache instead. Does this have disadvantages compared to the previous stacks with the varnish layer? With rack-cache, aren't there fewer servers serving the caching layer, and in a less optimized way? http://devcenter.heroku.com/articles/http-routing http:/