At least in _setObject(), BTreeFolder hits a wall above around 10,000 objects that slows it down a lot. This is due to all the ObjectManager machinery in Zope that does stuff like check security, etc. There are ways to access the underlying objects contained in the folder's tree, but this is unsafe from a security perspective, so if you choose to do this, you should know what you are doing (you use _getOb() and _setOb() from within a Python Product, so you should be familiar with creating a Python Product deriving a subclass from BTreeFolder, and insulate all calls to this in your own "security" checks and careful coding). This does yield much better speed, though, in both setting and getting an object. A bigger box would definitely help, too. With that little memory, it also might not hurt to apply some patches from CVS that implement new indexes for FileStorage that decrease the per-object storage index overhead (seach the ZODB-dev list for more info), or upgrade your RAM, since that is a relatively cheap fix. Sean -----Original Message----- From: sree [mailto:sree@indiacares.org] Sent: Monday, January 28, 2002 4:30 AM To: zope@zope.org Subject: [Zope] more info about BTree Dear friends, Greetings! I just downloaded BTree and tried working with it as I was told btree could handle large no. of objects of similar structure with ease. I filled in 15,000 dtml methods and the zope almost stopped responding... May be my test server ( a pc running win 98, my-sql and zope on 64mb ram ) was not good enough. I want to know more about BTree. I searched zope site and got only 6 links to the subject was not good enough to understand BTree. Does anybody have any web links whith provide more info... Thanks in advance. Regards, - sree _______________________________________________ Zope maillist - Zope@zope.org http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )