[2012-12-03 16:30 -02:00] You have joined the channel
[2012-12-03 16:30 -02:00] Topic: Varnish 3.0.3 released .:. please supply VCL and varnishlog output with help requests
[2012-12-03 16:30 -02:00] DocWilco set the topic at: Oct 31, 2012 6:06 PM
[2012-12-03 16:30 -02:00] Mode: +nrt
[2012-12-03 16:30 -02:00] Created at: Jun 17, 2011 3:53 PM
[2012-12-03 16:31 -02:00] mhack: Hello. Is there any working in progress or intention to implement RFC 5861 (stale-*) cache-control extensions?
[2012-12-03 17:20 -02:00] packbart: mhack: shouldn't that already be possible with VCL and grace?
[2012-12-03 17:24 -02:00] packbart: stale-if-error might be a bit tricky, though
[2012-12-03 17:48 -02:00] mhack: packbart: yes, that's possible to use grace mode, but don't you think that giving control for the underling origin server to manage those directives through cache-control header could be interesting in some cases?
[2012-12-03 17:48 -02:00] packbart: yes. what I meant: you can already set beresp.grace from stale-while-revalidate
[2012-12-03 17:49 -02:00] packbart: in vcl_fetch
[2012-12-03 17:51 -02:00] mhack: sure. but my point is that for scenarios with many different resources requiring specific stale-* configuration it could be hard to manage.
[2012-12-03 17:51 -02:00] packbart: hmm. I don't quite follow. see https://github.com/lampeh/varnish-vcl/blob/master/common/ttl_v-maxage.vcl (although that sets beresp.ttl from v-maxage)
[2012-12-03 17:54 -02:00] packbart: replace beresp.ttl with beresp.grace and v-maxage with stale-while-revalidate
[2012-12-03 17:56 -02:00] mhack: oh, sure.. got it. my mistake :)
[2012-12-03 17:57 -02:00] mhack: but there is no simple solution for stale-if-error, right?
[2012-12-03 17:58 -02:00] mhack: but is it possible anyway?
[2012-12-03 17:58 -02:00] packbart: not that I can see. vcl_fetch would have to access a second object, the possible stale cache hit. and it might be already beyond its grace time.
[2012-12-03 18:00 -02:00] packbart: possibly set beresp.grace to stale-if-error and compare TTL agains stale-while-revalidate in vcl_deliver and restart/launch background fetch. but that even sounds nasty
[2012-12-03 18:45 -02:00] mhack: packbart: understood. well, so I can see that a "real" compliance with RFC 5861 isn't in the development horizon, right?
[2012-12-03 18:46 -02:00] andersm_: mhack: throw enough money at Varnish Software and it will be. =)
[2012-12-03 18:46 -02:00] mhack: andersm_: well, that whould be the next question :)
[2012-12-03 18:48 -02:00] mhack: we have varnish commercial support contract, and I asked our infrastructure team to talk about that with you, but they're taking a while to do that.. lol
[2012-12-03 18:48 -02:00] Mithrandir: yeah, you can kinda do it today, but it's not currently a priority.
[2012-12-03 18:48 -02:00] Mithrandir: mhack: if you can say, who are "we"? :-)
[2012-12-03 18:48 -02:00] mhack: Editora Abril
[2012-12-03 18:48 -02:00] mhack: from Brazil
[2012-12-03 18:48 -02:00] Mithrandir: ah. :-)
[2012-12-03 18:48 -02:00] Mithrandir: pleased to meet you
[2012-12-03 18:49 -02:00] Mithrandir: (jftr, I'm tech lead at Varnish Software, responsible for our support operations)
[2012-12-03 18:49 -02:00] mhack: cool. nice to meet you too
[2012-12-03 18:49 -02:00] mhack: did you guys received any question about that from our team?
[2012-12-03 18:49 -02:00] Mithrandir: I can't say I remember seeing it.
[2012-12-03 18:50 -02:00] mhack: no problem
[2012-12-03 18:50 -02:00] Mithrandir: but if you mail me (tfheen@varnish-software.com), I'll follow up.
[2012-12-03 18:50 -02:00] Mithrandir: (it's close to ten in the evening here now, so I'm not actually working. :-)
[2012-12-03 18:51 -02:00] mhack: sure. I'm going home as well, almost 7pm over here :)
[2012-12-03 18:51 -02:00] Mithrandir: :-)
[2012-12-03 18:51 -02:00] mhack: I'll contact you to in the next fell days to talk about it, so.
[2012-12-03 18:52 -02:00] mhack: thank you very much.
[2012-12-03 18:52 -02:00] mhack: few days
[2012-12-03 18:52 -02:00] mhack: :)
[2012-12-03 18:52 -02:00] andersm_: I'm not affiliated with Varnish Software in any way, but I would heartily recommend throwing money at them anyway. Not that I've gotten my employer to do so yet, but it is likely that we will some day. Hell, we ought to pay them for hanging out here. =]
[2012-12-03 18:52 -02:00] Mithrandir: mhack: great, looking forward to it. :-)
[2012-12-03 18:54 -02:00] mhack: andersm_: sure we do. It's a really nice piece of work.
[2012-12-03 18:55 -02:00] mhack: see you guys.