[Zope-dev] Re: Timing the opening of network ports

[Florent Guillaume]

+1 on the general goals, however I have no idea if it's easy to implement.

Florent

Christian Theune wrote:
> Hi,
> 
> a while ago I realized that I liked the initial opening of network ports
> immediately on server start.
> 
> After working on a busy site with ZEO in the summer I wished that this
> feature would be configurable. There are different scenarios that ask
> for opening the network ports early or late:
> 
> Situation 1:
> 
> You are a developer and restart your server frequently. You want the
> ports to be open as soon as possible, even if the site takes a while to
> load, because your browser accepts a reload immediately. If you use
> tabbed browsing this also notifies you when the server is ready and you
> can read /. while waiting ... 
> 
> 
> Situation 2:
> 
> You are have a site with only a single application server (w/ or w/o
> ZEO) and have to restart your server. You want to minimize proxy errors
> (via Apache) and connection losses experienced by people visiting your
> site/using your application. So opening the ports early is good here.
> 
> Situation 3:
> 
> You are have a site that uses a ZEO cluster. You have to restart the
> application servers while people are using the site. As you have a load
> balancer, there are always some application servers around that can
> answer the queries. Now you want to open the network ports as late as
> possible. In the ideal case, when the complete server is ready. This
> avoids that people's connections go onto a still booting server and have
> to wait for several seconds which results in a even more loaded queue on
> the booting server ...
> 
> Does this sound reasonable to make the behaviour of opening the ports
> configurable? Does anybody have an idea how hard this would be to do?
> 
> Cheers,
> Christian

-- 
Florent Guillaume, Nuxeo (Paris, France)   Director of R&D
+33 1 40 33 71 59   http://nuxeo.com   fg at nuxeo.com