Re: Two New HTTP Caching Extensions
On Tue, Apr 8, 2008 at 4:34 PM, Ricardo Newbery <[EMAIL PROTECTED]> wrote: > > I should add a qualifier to my vote, that stale-while-revalidate > > generally is used to mask suboptimal backend performance and so I > > discourage it in favor of fixing the backend. > > Of course the main premise of a reverse-proxy cache is to mask suboptimal > backend performance. :-) Except, in this case, you are presumably already relieving your backend of a significant burden with your cache. if your backend is *still* unable to process requests to fulfill a request from the caching layer within a reasonable time, you're in serious trouble indeed. --Michael ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Re: Two New HTTP Caching Extensions
On Apr 8, 2008, at 4:26 PM, Michael S. Fischer wrote: > On Tue, Apr 8, 2008 at 4:25 PM, Michael S. Fischer <[EMAIL PROTECTED] > > wrote: >> On Tue, Apr 8, 2008 at 4:18 PM, Ricardo Newbery <[EMAIL PROTECTED] >> > wrote: >>> +1 on stale-while-revalidate. I found this one to be real handy. >> >> Another +1 > > I should add a qualifier to my vote, that stale-while-revalidate > generally is used to mask suboptimal backend performance and so I > discourage it in favor of fixing the backend. > > --Michael Of course the main premise of a reverse-proxy cache is to mask suboptimal backend performance. :-) Ric ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Re: Two New HTTP Caching Extensions
On Tue, Apr 8, 2008 at 4:25 PM, Michael S. Fischer <[EMAIL PROTECTED]> wrote: > On Tue, Apr 8, 2008 at 4:18 PM, Ricardo Newbery <[EMAIL PROTECTED]> wrote: > > +1 on stale-while-revalidate. I found this one to be real handy. > > Another +1 I should add a qualifier to my vote, that stale-while-revalidate generally is used to mask suboptimal backend performance and so I discourage it in favor of fixing the backend. --Michael ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Re: Two New HTTP Caching Extensions
On Tue, Apr 8, 2008 at 4:18 PM, Ricardo Newbery <[EMAIL PROTECTED]> wrote: > +1 on stale-while-revalidate. I found this one to be real handy. Another +1 --Michael ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Re: Two New HTTP Caching Extensions
On Apr 7, 2008, at 3:18 PM, Jon Drukman wrote: > Poul-Henning Kamp wrote: >> In message <[EMAIL PROTECTED]>, Sam >> Quigley writ >> es: >>> ...just thought I'd point out another seemingly-nifty thing the >>> Squid >>> folks are working on: >>> >>> http://www.mnot.net/cache_channels/ >>> and >>> http://www.mnot.net/blog/2008/01/04/cache_channels >> >> Interesting to see what hoops they try to jump through these days... >> > > I just got through working at Yahoo and they have valid reasons to > want > all these behaviors. The thing I didn't like about the cache channel > implementation is it involves squid polling an RSS feed every few > seconds to determine which bits of the cache to invalidate. > > I'm looking at launching a small site for a client and the > stale-while-revalidate/stale-on-error functionality is fairly > critical. > I want to go with varnish, though. Front end cache server in India, > pulling content from the USA... lots of potential for slow/dead > connections back to the origin, so it would be great if Varnish would > serve stale content in this eventuality. > > -jsd- +1 on stale-while-revalidate. I found this one to be real handy. Ric ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Re: Two New HTTP Caching Extensions
Poul-Henning Kamp wrote: > In message <[EMAIL PROTECTED]>, Sam Quigley writ > es: >> ...just thought I'd point out another seemingly-nifty thing the Squid >> folks are working on: >> >> http://www.mnot.net/cache_channels/ >> and >> http://www.mnot.net/blog/2008/01/04/cache_channels > > Interesting to see what hoops they try to jump through these days... > I just got through working at Yahoo and they have valid reasons to want all these behaviors. The thing I didn't like about the cache channel implementation is it involves squid polling an RSS feed every few seconds to determine which bits of the cache to invalidate. I'm looking at launching a small site for a client and the stale-while-revalidate/stale-on-error functionality is fairly critical. I want to go with varnish, though. Front end cache server in India, pulling content from the USA... lots of potential for slow/dead connections back to the origin, so it would be great if Varnish would serve stale content in this eventuality. -jsd- ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Re: Two New HTTP Caching Extensions
In message <[EMAIL PROTECTED]>, Sam Quigley writ es: >...just thought I'd point out another seemingly-nifty thing the Squid >folks are working on: > >http://www.mnot.net/cache_channels/ >and >http://www.mnot.net/blog/2008/01/04/cache_channels Interesting to see what hoops they try to jump through these days... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Re: Two New HTTP Caching Extensions
...just thought I'd point out another seemingly-nifty thing the Squid folks are working on: http://www.mnot.net/cache_channels/ and http://www.mnot.net/blog/2008/01/04/cache_channels -sq ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Re: Two New HTTP Caching Extensions
Paul <[EMAIL PROTECTED]> writes: > Found these ideas very interesting, made it into Squid 2.7. Was > curious if Varnish would ever support similar functionality. > > http://www.mnot.net/blog/2007/12/12/stale Isn't it fascinating to see the Squid developers discussing this approximately 18 months after we put it on our roadmap? It was actually planned for Varnish 1.0, but was left out as it turned out not to be necessary for vg.no (which was our target at the time) DES -- Dag-Erling Smørgrav Senior Software Developer Linpro AS - www.linpro.no ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Two New HTTP Caching Extensions
Found these ideas very interesting, made it into Squid 2.7. Was curious if Varnish would ever support similar functionality. http://www.mnot.net/blog/2007/12/12/stale ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
