Another concern with ZODB is the max DB size: on Linux based system with the ext2 file-system and the kernel patch, the max file size is 4 GB; since the Zope DB is stored into a single file (right?), this mean that the max DB size is 4 GB.
I believe there are ways around this, but I'm not a linux guru.
Well, consider that with a site that is getting the insane traffic level being tossed around here to really incur problems, no pansy machine will be able to handle it. For something that size, I'd reccomend an Alpha processor powered machine, where there is essentially no file size limit in Linux. Proces are quite comparative now, too. -- In flying I have learned that carelessness and overconfidence are usually far more dangerous than deliberately accepted risks. -- Wilbur Wright in a letter to his father, September 1900