As far as threading issues, it is a problem, but on some level any system has to deal with concurrency, and concurrency is hard. It’s the same in Zope (though they tend to keep threads more isolated to avoid some of these issues). Twisted doesn’t solve this either, it just uses a different technique for concurrency. And if you want to use something like SQLObject (which you can) you’ll have to do so with threads — leaving you potentially with both thread and async issues.

I think there are some advantages to the forking system that Apache uses. SkunkWeb also does this, but unlike mod_python it doesn’t run in the Apache process. Keeping the two isolated can provide some advantages, and make it all more controllable.

• I think the best way to fix my trouble w/ webware is to tweak the ServletFactory, since i want to have advanced cache. I want the servlet to be reusable because i work w/ ZPT, and ZPT are long to parse.
• Mixing Twisted with thread won’t be a nice approach i think, since as you say, ‘leaving you potentially with both thread and async issues’. I haven’t take a look deeply in ZPublisher but Zope doesn’t suffer of this kind of issue.
• The fork approach (which i forget in the document) can be a way to do this too. but once again i guess this can eat a lot of CPU, and i try to avoid this.. But i gonna look at Skunk closer

Also there is a good light and fast OODB called Atop which is available at http://www.divmod.org

Twisted has NO problems to work with databases itself, and it has no problems working with threads. Actually it uses a ThreadPool to connect to various databases, if you need to some heavy tasks which are blocking you can always use ‘deferToThread’ which sends your task to a thread and then returns the result to the main twisted thread.

Also you can rely on processes, which are far better than threads in python (at least), because they can be debugged easily and can be stopped easily and can scale to more computers. 32 computers are cheaper than a 32-way SMP supercomputer.

Also Nevow is arguably the best web framework out there for scalability and speed :P

• For me ORM has nothing to deal w/ a web oriented framework. I think SQLObject or Modeling offer a large set of possibilites for this kind of issues.
• OODB, hum if i need to choose one OODB i guess i’will choose ZODB. But once again that doesn’t feet w/ my needs.
• Do you meen that using SQLo in twisted is do-able ? Hum .. mixing thread w/ async is perhaps a not so bad idea .. i don’t know.
• Processes is a good approach too .. perhaps a mix, i mean: a Twisted server for page rendering and another for DB..
• Last: yes Nevow is pretty kool for templating (one more !!) but i don’t feel confident w/ Stan :) I think template is a html file and Stan .. no thanks :)

It is also used to produce xmls like an RSS feed with little to no effort.

The most important thing of all, anyway, is that you don’t have to use stan if you don’t like it. It is widely used in the examples because with stan you can fit everything inside just one python file (which is handy for that matter).

BTW, maybe the reason because you have a 2 day vacuum on your DB is probably because you haven’t written you SQL by hand (which is great for optimizing a database).

Give a try to Nevow and don’t look at stan if you don’t like it (it is great for protoyping though).

PS: I’m no Twisted enthusiast ;P

Performance is quite high, as the SCGI-Server can spawn more processes if requests come in rapidly. Threading within the requesthandler can be used, but does not need to be used – and is ususally not needed.

SCGI is a very lightweight protocol. http://www.quixote.ca