From shane at zope.com  Thu May  8 12:37:01 2003
From: shane at zope.com (Shane Hathaway)
Date: Sun Aug 10 16:44:24 2008
Subject: [zope-news] News bits
Message-ID: <3EBA87AD.3060307@zope.com>

I don't know who's coordinating news releases now, but I'm just going to 
throw some news in the pit.  It would be nice if others provided their 
own perspective as well.



New zope.org

Zope running on the alpha NZO test box has been suffering memory bloat 
lately.  Within hours of a restart, the Zope process expanded from 50 MB 
to over 1 GB.  But thanks to some advice from Jeremy on sys.getobjects() 
(available only if you compile Python --with-pydebug), we found the 
cause.  The problem was that the migration script created software 
release files as very large strings in ZODB instead of breaking them up 
into 64K chunks.  After a quick fix using a catalog search, the RAM 
footprint is now under control.

In the process, we learned a lot about how to find memory leaks.  There 
are still several small leaks on NZO, but at least we now have plenty of 
clues about where to look.

http://www.python.org/~jeremy/weblog/030410.html



Bridging Zope and the Filesystem

There is a lot of work going into bridging Zope and the filesystem. 
Some of the efforts are:

Ape, http://hathaway.freezope.org/Software/Ape
CMF DirectoryViews, http://cmf.zope.org/
CVSFile, http://www.zope.org/Members/arielpartners/CVSFile
ExternalFile, http://www.zope.org/Members/arielpartners/ExternalFile
ExtFile, http://www.zope.org/Members/MacGregor/ExtFile
LocalFS, http://sourceforge.net/projects/localfs
RevisionManager, http://www.zope.org/Members/philikon/RevisionManager
ZCVSFolder, http://www.zope.org/Members/sspickle/ZCVSMixin
Zope 3 filesystem synchronization, 
http://dev.zope.org/Zope3/FileSystemSynchronizationProposal

There are a lot of choices.  Coming to terms with the different 
approaches will make for interesting discussion over the next few 
months.  Ape is the newest and tries to incorporate everything learned 
from other approaches, but the Zope 3 filesystem synchronization project 
has the benefit of sprints.  Should we have an Ape sprint?  That might 
be fun.



Zope Profiler

A particularly interesting new product is ZopeProfiler by Dieter Maurer. 
  It reveals both Zope and Python profiling statistics in a sortable 
table.  It provides more details than CallProfiler.  It could be a great 
addition to the Zope core.

http://www.dieter.handshake.de/pyprojects/zope/#bct_sec_2.1



Relationships

There was a lot of discussion on the zope3-dev and zope-dev lists about 
storing arbitrary inter-object relationships.  Zope 3 is going to 
provide a relationship service, but in some ways it does not seem 
adequate.  Roche Compaan will post a new relationship management 
proposal soon so that people can comment on something concrete.



Shane