Varnish Dirty Caching

Anton Stonor stonorn at
Tue Jul 3 13:25:05 CEST 2007

Poul-Henning Kamp wrote:

> The critical question is how we define "backend is down" and how
> fast and efficient we can detect it.

Right. I tend to like the Perlbal approach: Issue a http OPTIONS and 
check if we get anything back from the backend. It is quite lightweight.


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