I recommend you get more servers, get a dedicated one for db and make sure the HD is super fast (15000 rpm). Cloud solutions would be too expensive for your sc

I recommend you get more servers, get a dedicated one for db and make sure the HD is super fast (15000 rpm). Cloud solutions would be too expensive for your scenario. I used to develop facebook applications with one that reached 1 million users a day. I needed 5 servers to handle the load. It would cost me three times if I had used cloud solutions. In Europe, you can use giga-international.com for cheap powerful servers with responsive customer service. Then use memcache if needed.