Fwd: Varnish Cache

[sujith pv]

Thanks all for the help....Sorry for raising one more question as given
below

I have a scenario around multiple instance of Varnish and trying to build a
fail over. For example lets say I have three instances of Varnish for
example Varnish A, Varnish B and Varnish C and all are serving the
requests. Suppose servers B and C are down, then I need to identify that
only Server A is available and it wont be able to serve my traffic. So in
this context I will plan some logic in my application to do a fail over and
talk directly to the Back end system for some time until Varnish is Up and
running.

So I'm doubtful how we can track the failures in Varnish, do we have any of
the varnishstats indicates us that it has problem and can not serve the
traffic or any other way

Any help on this....

Best Regards
Sujith P V

On Fri, Jun 10, 2016 at 3:17 AM, Paul A. Procacci <pprocacci at datapipe.com>
wrote:

> On Thu, Jun 09, 2016 at 11:17:57PM +0200, Per Buer wrote:
> >    Hi,
> >    Since that blog post was written we've managed to convince PHK to
> >    accept query string sorting into the std vmod - which is bundled with
> >    Varnish itself.
> >    Now you just do "import std;" and then you can call
> >    std.querysort(req.url) to sort the querystring.
> >    Per.
>
> Now that you mention it, I do recall see'ing it in the std vmod.
> Thanks for reminding me.
>
> ~Paul
>
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