Varnish send while cache
I wanted the varnish download the file to the cache while sends to client. From what I am seeing, it first download and then send the file, and that with very large files, is slow.
(sorry for english, I'm using an online translator.)
This is still not supported. The latest version 2.1.2 will receive the whole response from the backend before sending it to the client.
I hear it's coming soon though. Keep an eye on the varnish-cache.org news section or perhaps ask in #varnish @ irc.linpro.no.