Hi, I'm considering building a large scale, but small in features site. It will contain lots of small objects (millions, tens of millions, hundreds of millions) of objects, where each object has a couple of strings and maybe some other light attributes. So far, I've been contemplating disabling undo (if that's possible), and using BTree structures, maybe segmenting objects into different groups (folders) to further speed up lookups. Scalability is also an issue, should I consider using RelStorage? Should I consider using the ZCatalog for faster lookups? Has anyone else developed something similar? Are there Zope product examples out there that fit the bill? -Morten -- Morten W. Petersen Manager Nidelven IT Ltd Phone: +47 45 44 00 69 Email: morten@nidelven-it.no