Dear Marco: forum caching problem

[RationalBeing]

Hi,

I want to create a forum wiht roughly 2000 subforums. However, i googled for forum software and found the following quote from marco:

Even though vBulletin supports "unlimited" forums, in real life more then 1.500-2.000 forums will put a too high pressure on the server (performance and memory). The real maximum depends on the server and the server configuration. As vBulletin 3.x will cache each forum in the datastore (and will load this information into memory on each page load), you would quickly run out of memory.

Some boards that use this many (sub)forums are still using vBulletin 2.x only because that version does not do forum caching and will preserve memory in cases like this. One of the things that will be focussed on when developing vBulletin 4 (there is no indication on a date for that) is the reduction of memory usage for large boards.

I'm interested in vbulletin, however I'm not sure, after reading this, vbulletin will work for me, with my need for 1500+ forums, on a server with dual 2ghz xeons and 2GB of ram. I fear that will be insufficient. Is it possible to disable this caching with 3.x. And if not, can 2.x still be purchased?

Thanks much

Or, after doing some googling, is it possible to move the forum cache, which would hog up my ram, to a hard drive based datafile that could be readable?

Please let me know.

Thanks