Lots of configs

AD straightflush at gmail.com
Mon Mar 7 19:55:09 CET 2011

Thanks Per.  I guess the other part of this was to make the config more
scalable so we are not constantly adding if/else blocks.  Would by nice to
have a way to just do something like

 call(custom_ + req.hostname)

On Mon, Mar 7, 2011 at 1:35 PM, Per Buer <perbu at varnish-software.com> wrote:

> Hi,
> On Sun, Mar 6, 2011 at 11:39 PM, AD <straightflush at gmail.com> wrote:
>>  what is the best way to run an instance of varnish that may need
>> different vcl configurations for each hostname.  This could end up being
>> 100-500 includes to map to each hostname and then a long if/then block based
>> on the hostname.  Is there a more scalable way to deal with this?
> CPU and memory bandwidth is abundant on modern servers. I'm actually not
> sure that having a 500 entries long if/else statement will hamper
> performance at all. Remember, there will be no system calls. I would guess a
> modern server will execute at least a four million regex-based if/else per
> second per CPU core if most of the code and data will be in the on die
> cache. So executing 500 matches should take about 0.5ms.
> It might not make sense to optimize this.
> --
> Per Buer, Varnish Software
> Phone: +47 21 98 92 61 / Mobile: +47 958 39 117 / Skype: per.buer
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