re upgrading a big vB2 board to vB3

[tsadi]

i remember seeing thread here once about someone who runs a very big vB2 board (i think he mentioned that his BB is one of the top 10 biggest vB installations in the world) - and that because of his sites size, its impossible for him to upgrade to vB3 without his site going down for days.

i've been searching for it but can't find it anywhere.

can someone point the thread out to me? i kinda want to know how he's doing so far. thanks!