-----Original Message----- From: Jimmie Houchin [mailto:jhouchin@texoma.net] Sent: Friday, May 21, 1999 11:40 PM To: zope@zope.org Subject: [Zope] Building a server for Zope
Hello,
I am in the process of researching my options for building a server to host my Zope website.
The server will be running RedHat Linux 6.x and either ZAP or ZServer if it's ready. I know that Linux is SMP capable.
If I am running Zope and ZServer, will Zope 2.x benefit from a multiprocessor system?
Python has a global interpreter thread lock. This means that all of your python threads contend for this global lock while they are running. Pyhton itself will nicely preempt your threads and they will flow smoothly, and there are sections of Python where it is safe for two threads to run conccurently, but you will not notice an Nfold increase of speed for N processors. I think this is being addressed in the Python community. I have no idea, but I've heard mention that python 2.0 will not have the global lock. Don't quote me though. The threading in ZServer is still a big win, however, because the internal Python thread switching is much more efficient then the external OS process/thread context switching. With Zope 2.0 and ZServer, one request will not block all other requests because Pyhton will nicely switch between Zope threads even in the middle of a request. This model will give you even better performance than the Apache multi-process model, which suffers a very expensive context switch for each Apache process. -Michel
I am working on a tight budget so for an example here are a few options.
single PII 400 or 450 or K6-3 450
or
dual PII 300 or 333
or
dual PPro 200 (talking to a friend who might have one available)
Jimmie Houchin
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