Re: [Zope] Re: Zope scalabilty and problems

2005-09-05 Thread Chris Withers

michael nt milne wrote:

I am setting up sites using Plone and am concerned to read some of the
comments on it. Is it really that bad performance wise? 


"it depends", unless you have a lot of experience with it, Zope and CMF, 
you might well find yourself with a slow site on your hands and not many 
apparent options ;-)



I'm using
CMFMember also-why is it 'apalling'?


It's an incredibly heavyweight and inefficient solution to a problem 
that requires an extremely fast and efficient solution: user object are 
used a LOT in most Zope apps, CMFMember makes them slow, in a numbner of 
ways. Generating writes which result in AT-based member objects being 
reindexed and often resulting in conflicterrors that dramatically slow 
down a site is not a good thing...


cheers,

Chris

--
Simplistix - Content Management, Zope & Python Consulting
   - http://www.simplistix.co.uk
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Re: [Zope] Re: Zope scalabilty and problems

2005-09-05 Thread Chris Withers

Hi Dieter,

Dieter Maurer wrote:

I am setting up sites using Plone and am concerned to read some of the
comments on it. Is it really that bad performance wise?


No, it is not.


...I agree, if it is correctly set up and optimised, which isn't the 
case if someone is here complaining about performance, which sadly, new 
users blown away by Plone's functionality often are...



It is just that the CMF is unable to fix a year long bug
which affects Windows only when Zope is run in debug mode:

  then each access to a "filesystem directory view" triggers
  a hierarchical file system scan.

  The result is a slowdown by several orders of magnitude.


FWIW, my experiences with Plone are predominantly on Linux, and that's 
what my comments are based on...



The problem disappears when you either:

  *  turn off "debug mode"


Yes, this is a biggie. Thankfully, I believe newer versions of Zope ship 
with this turned off by default?


cheers,

Chris

--
Simplistix - Content Management, Zope & Python Consulting
   - http://www.simplistix.co.uk
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Re: [Zope] Re: Zope scalabilty and problems

2005-09-02 Thread Dieter Maurer
michael nt milne wrote at 2005-9-2 09:13 -0400:
>I am setting up sites using Plone and am concerned to read some of the
>comments on it. Is it really that bad performance wise?

No, it is not.

It is just that the CMF is unable to fix a year long bug
which affects Windows only when Zope is run in debug mode:

  then each access to a "filesystem directory view" triggers
  a hierarchical file system scan.

  The result is a slowdown by several orders of magnitude.

The problem disappears when you either:

  *  do not run on Windows

  *  turn off "debug mode"

  *  fix the silly bug


Of course, a Plone site is not as fast as a static one.
But, I hope, you expect this...


-- 
Dieter
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