Thanks for getting back to me. I went back and tried poking around some more. It seems like when I set the TTL to zero it seems to disable the conditional request functionality as well. Anyway, when I set the TTL to 1s instead, it seems to be working well, with however long keep-times I give it.
Thanks :) -m On Fri, Sep 18, 2015 at 12:57 PM, Guillaume Quintard <[email protected]> wrote: > Hi Magnus, > > The documention you are looking for is here : > https://www.varnish-cache.org/docs/4.0/reference/vcl.html > > And beresp.keep is definitely what you are looking for. If ttl is expired > but not ttl + keep, varnish will issue a conditionnal request. > > -- > Guillaume Quintard > > On Fri, Sep 18, 2015 at 12:35 PM, Magnus Hoff <[email protected]> wrote: >> >> Hi :) >> >> What is the status of support for conditional backend requests? >> >> My use case is accelerating CouchDB, which has good support for ETags, >> but offers no other caching opportunities. >> >> I have found [1] which leads me to think that the branch implementing >> this feature was merged to trunk in 2011. According to [2] (which also >> says, in big bold letters, "This documentation is out of date"), I >> should be able to see this working with the default VCL: "In the >> default case (i.e. if not superseded by something in VCL), a >> conditional request is generated during fetch with If-Modified-Since >> and/or If-None-Match headers whose values are taken from stale_obj's >> Last-Modified and/or ETag headers." >> >> [1]: >> https://www.varnish-cache.org/lists/pipermail/varnish-commit/2011-July/006720.html >> [2]: https://www.varnish-cache.org/trac/wiki/BackendConditionalRequests >> >> However, when testing with the latest Varnish from the Varnish Ubuntu >> repository (https://www.varnish-cache.org/installation/ubuntu), >> "varnish-4.0.3 revision b8c4a34", I am unable to trigger conditional >> backend requests in the default configuration. I have feebly tried >> making the VCL more explicit in that it should try to keep the ETagged >> versions around by setting beresp.keep explicitly, but I can't seem to >> effect a change in behavior. >> >> So, what is happening? Does Varnish currently support what I am >> looking for? What is the up to date documentation on this? Is there >> support for this on a branch still? How is that branch coming along? >> >> >> Thank you :) >> - Magnus Hoff >> >> _______________________________________________ >> varnish-misc mailing list >> [email protected] >> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc > > _______________________________________________ varnish-misc mailing list [email protected] https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
