1. About the cloud above written. Actually what you need is hosting with scalable options. It's not really a cloud, but for cloud rates you get. Amazon view.
And don't forget to specify in advance, what will cost you is the capacity expansion.
2. As an option, to move to more powerful resources.
3. If the ratio of the power servers Slashdot-the effect is not very bad, then a reference can be made to cut off part of the audience (Yes, even the previous redirect). And thus process let the part of potential visitors, but to process.