503 Error was met frequently

[Dridi Boukelmoune]

Hi,

About the 5 backends limit, you might be interested by this link:
https://www.varnish-cache.org/docs/trunk/phk/backends.html

PHK basically states that 1000 backends is not an unreasonable number.

I assume that backends are limited according to available resources
and other factors that can't be established without proper
measurements.

Best regards,
Dridi

On Fri, Jan 11, 2013 at 4:24 AM, Shaohui Zheng <shaohui.zheng at gmail.com> wrote:
> I refers other people's configure file on internet, it seems that it is out
> of date :).
>
> the command varnishlog -b -i TxURL is a great for debugging.
>
> Thanks Rangel Raul & Peter Jacobs.
>
> the new VCL configure file works well, and the 503 error has been gone.
>
> You guys really solve me a big problem.
>
> I have other question, I know many people select LVS(Linux Virtual Server),
> but I prefer Varnish. I hear from some guys said Varnish can only take 3 ~ 5
> backends, if it takes more backends, the performance will downgrade too
> much. Do you have some experience? how many backends can varnish maintain
> with best performance,  just according to the experience.
>
>
> I already have 5 backends according to the workloads, but it seems that the
> backends workload is still too high, I want to add more nodes. Waiting for
> your advice, thanks.
>
>
> On Wed, Jan 9, 2013 at 11:14 PM, Rangel, Raul <Raul.Rangel at disney.com>
> wrote:
>>
>> varnishlog -b -i TxURL.
>
>
>
>
>
> --
> Best regards
> Shaohui
>
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