hi again, i've been guilty in the past of going overboard with a new technology that i become enamoured with. so, before i go over the top with zclasses, can i just play out this scenario and seek input on the appropriateness of zclasses : a city guide site with events and locations pretty much like citysearch.com ; data is currently held in a relational database (mysql) which allow for great sorting of data (especially with one-to-many relationships for dates of events). images are stored on the filesystem and the entire mysql database can be held in memory making for very fast queries. why move this to zope's object database ? i'm only concerned with performance on the website.... we have security and data-entry all sorted out anyway so ACL's etc are not a factor. performance is paramount.* * i will admit that if we were building this site from scratch, it would have been a no-brainer : zclasses would have saved me buiding all those tedious management screens which seem to accompany every app !!!! it especially seems weird to move images to the zodb as mentioned in some previous threads because that would increase the size of the database such that it might not be able to sit permanently in RAM finally , whilst zope is looking excellent for application development, i'd be lying if i were to say that i am not nervous about using it on my production machine. i'm in the midst of converting a website with 2-3 million hits/day which is 200,000-300,000 page views (80% of which are dynamically generated) to zope. we're using apache and cgi right now and the server is handling it admirably (PIII 450, 512 MB RAM, U-W SCSI, FreeBSD 3.2). apache has been rock solid. is anyone handling comparable loads on zope at the moment ? using zserver or zope-on-apache ? sorry for the long questions cheers, chas