Varnish - set backend if statuscode is 404

[Per Buer]

I've written a short blog post on the subject since this seems to come up
from time to time.

https://www.varnish-software.com/blog/404-handling-varnish-cache

I need to figure out how we'll deal with this in 4.0.

Per.


On Fri, Nov 29, 2013 at 1:24 PM, Per Buer <perbu at varnish-software.com>wrote:

> On Fri, Nov 29, 2013 at 1:15 PM, Jan-Frode Myklebust <janfrode at tanso.net>wrote:
>
>> On Fri, Nov 29, 2013 at 09:06:15AM +0100, Per Buer wrote:
>> > >
>> > > @per, you suggested saint mode. Why? What would it do better than
>> Tobias'
>> > > solution?
>> >
>> > Saint mode works if you have two backends in the same director. Then it
>> > blacklists that object from that backend for a certain time. A restart
>> > would then direct the request to the other backend.
>> >
>> > Tobias solution is to have two backends. The other one is only used when
>> > the first one fails.
>> >
>>
>> Ideally we want both. Our two hosts in the director are fully
>> functional, but one of them might not have received a given file yet. So
>> we want to try the other backend in the director, not mark it as faulty
>> when it gets the 404.
>>
>
> I'm pretty sure you didn't read my reply properly.  :-P
>
> Note that the blacklist is temporary. If you know that you spend up to
> five seconds updating your server you set it to 5s.
>
>
> --
>  <http://www.varnish-software.com/> *Per Buer*
> CTO | Varnish Software AS
> Phone: +47 958 39 117 | Skype: per.buer
> We Make Websites Fly!
>
> Winner of the Red Herring Top 100 Europe Award 2013
>
>
>


-- 
 <http://www.varnish-software.com/> *Per Buer*
CTO | Varnish Software AS
Phone: +47 958 39 117 | Skype: per.buer
We Make Websites Fly!

Winner of the Red Herring Top 100 Europe Award 2013
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.varnish-cache.org/lists/pipermail/varnish-misc/attachments/20131129/ea168826/attachment-0001.html>