load-balancing

[Jason Price]

Andrei:

Why do you care that the cache is synchronized between each remote DC?

The simple way would be to do your any-cast'd IPs be your front end, and
have them all talk to a centralized 'private' varnish which fronts the
actual service.

This would allow the individual servers to have a more relevant to their
queries cache, and the centralized version would handle any duplication of
requests from making it back to the true backend.

On Sat, Mar 18, 2017 at 4:28 AM, Andrei <lagged at gmail.com> wrote:

> (dubbing this over from the mod_auth thread for relevance due to my
> mistake earlier)
>
> Out of curiosity, has anyone done a CDN of Varnish servers? I have 4
> Varnish servers in different datacenters around the world, and use anycast
> IPs to direct traffic based on the region. I managed to do cache
> replication using a "fanout" method for new cache hits to be replicated
> through an intermediary server to the related group of Varnish servers, but
> was wondering if anyone had a better method of load balancing with cache
> replication.
>
> On Fri, Mar 17, 2017 at 8:47 AM, Rodney Bizzell <rbizzell at measinc.com>
> wrote:
>
>> Thanks!
>>
>>
>>
>> *From:* Guillaume Quintard [mailto:guillaume at varnish-software.com]
>> *Sent:* Friday, March 17, 2017 9:34 AM
>> *To:* Rodney Bizzell <rbizzell at measinc.com>
>> *Cc:* varnish-misc at varnish-cache.org
>> *Subject:* Re: load-balancing
>>
>>
>>
>> The docs have this: http://varnish-cache.org/docs/5.0/reference/vcl.html
>> (you are interested in bereq.backend and req.backend_hint) and
>> http://varnish-cache.org/docs/5.0/reference/vmod_directors.generated.html
>>
>>
>>
>> And there is a couple of articles about it:
>>
>> https://info.varnish-software.com/blog/backends-load-balancing
>>
>> https://info.varnish-software.com/blog/backends-load-balancing-part-2
>>
>>
>> --
>>
>> Guillaume Quintard
>>
>>
>>
>> On Fri, Mar 17, 2017 at 1:48 PM, Rodney Bizzell <rbizzell at measinc.com>
>> wrote:
>>
>> Hello,
>>
>> In the documentation is there a section on setting-up load-balancing
>> between two varnish servers.
>>
>>
>>
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