Vcl command restart and multiple backends

[Glen Kelly]

Hi Per

Thanks for your advice. I had previously had saint mode set up as per the url.

After see another users vcl on the mailing list over the weekend I have changed my vcl to

                   #    if (beresp.status == 500) {
                   #        set beresp.saintmode = 30s;
                   #        restart;
                   #    }

                       if (beresp.status != 200 && beresp.status != 403 && beresp.status != 404 && beresp.status != 301 && beresp.status != 302) {
                           set beresp.saintmode = 30s;
                           restart;
                       }

Hopefully this will help.

Glen

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From: Per Buer [mailto:perbu at varnish-software.com]
Sent: Friday, 12 November 2010 8:49 PM
To: Glen Kelly
Cc: varnish-misc at varnish-cache.org
Subject: Re: Vcl command restart and multiple backends

On Fri, Nov 12, 2010 at 12:52 AM, Glen Kelly <Glen.Kelly at fire.tas.gov.au<mailto:Glen.Kelly at fire.tas.gov.au>> wrote:
How does varnish handle request to multiple backend when the vcl "restart" command is run.

Does it use the same backend as the initial request or does it use another backend in accordance to the configured director.

You should look at "Saint Mode" - http://www.varnish-cache.org/docs/trunk/tutorial/handling_misbehaving_servers.html#saint-mode

When enabled it will blacklist failing objects from their backends.



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Per Buer,  Varnish Software
Phone: +47 21 98 92 61 / Mobile: +47 958 39 117 / skype: per.buer

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