As an extreme, can you imagine if Facebook doubled its usage in a week? It depends on what the site does and what floor it's starting from. We (Khan Academy) a

As an extreme, can you imagine if Facebook doubled its usage in a week? It depends on what the site does and what floor it's starting from. We (Khan Academy) are certainly not at Facebook's scale, but we do run a site with a lot of dynamic behavior and millions of monthly users. If we had our own bare metal in data centers, we either would have been way overprovisioned or would have been scrambling to keep up.