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:[email protected]]
Sent: Friday, 12 November 2010 8:49 PM
To: Glen Kelly
Cc: [email protected]
Subject: Re: Vcl command restart and multiple backends

On Fri, Nov 12, 2010 at 12:52 AM, Glen Kelly 
<[email protected]<mailto:[email protected]>> 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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