I don't know why turning off HT helped, but it seemed to in that case. You
mileage may vary.
Your right on the sticky session stuff, I looked a bit more deeply so am now
using the following. Remember to a2enmod headers.
RewriteRule ^/(.*) \
balancer://zopes/VirtualHostBase/http/%{SERVER_NAME}:80/plonesite/VirtualHostRoot/$1
[L,P]
ProxyPreserveHost On
Header add Set-Cookie "balancer_zopes=route.%{BALANCER_WORKER_ROUTE}e;
path=/;" env=BALANCER_ROUTE_CHANGED
<Proxy balancer://zopes>
BalancerMember http://127.0.0.1:8081 route=instance1 max=1
BalancerMember http://127.0.0.1:8082 route=instance2 max=1
BalancerMember http://127.0.0.1:8083 route=instance3 max=1
BalancerMember http://127.0.0.1:8084 route=instance4 max=1
ProxySet stickysession=balancer_zopes
</Proxy>
An issue with this is that the cookies seem to stop varnish caching anything
at all, at least with the config generated by plone.recipe.varnish 1.0rc6
Laurence
Alberto Lopes wrote:
>
> Dear Laurence,
>
> Thank you very much for your response. It helped me already, but I've
> still got some questions, and I hope you can help me learn a little more:
>
> 1 - Why does turning off HT help?
>
> 2 - In the tutorial:
> http://plone.org/documentation/how-to/sticky-sessions-and-mod_proxy_balancer
> Sticky sessions and mod_proxy_balancer at Plone documentation, it is
> stated that I should modify the plone_scripts/setAuthCookie script to set
> the stickysession cookie.
>
> But in your code, you simply set it to __ac. Is that cookie already set,
> or should I set it again?
>
> Thank you again for your help.
>
> Regards,
>
> Alberto
>
>
> Laurence Rowe wrote:
>>
>> You may be better turning off HT in the bios and running only two zope
>> processes. This site was running on linux though so I don't know if the
>> same applies in your case.
>>
>> When proxying it can be beneficial to set stickysession to the __ac
>> cookie so that clients go consistently to the same zope process (so they
>> consistently use the same acl_users cache). For best results you probably
>> want to run single threaded zope clients, but I don't know if the process
>> switching overhead on windows would negate this benefit or not.
>>
>> RewriteRule ^/(.*) \
>>
>> balancer://zopes/VirtualHostBase/http/%{SERVER_NAME}:80/plonesite/VirtualHostRoot/$1
>> [L,P]
>>
>> ProxyPreserveHost On
>> <Proxy balancer://zopes>
>> BalancerMember http://127.0.0.1:8081
>> BalancerMember http://127.0.0.1:8082
>> BalancerMember http://127.0.0.1:8083
>> BalancerMember http://127.0.0.1:8084
>> ProxySet stickysession=__ac
>> </Proxy>
>>
>> Laurence
>>
>
>
>
>
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