Varnish Dirty Caching

[Poul-Henning Kamp]

In message <20070702211450.GA16119 at falcon>, Christoph writes:

>i'd like to implement dirty-caching using varnish.

I'm busy twisting the variable visibility in VCL into proper shape
right now, and that will move us a bit closer to what your want
to do.

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

Ideas for how to express it in VCL are very welcome.

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