>>How can you assign more than one application pool to a web site ?
>
>Correction, I meant "worker process".
>
>But, all of that requires access to IIS. That is why I believe only in VM I would be able to control all that.

Further to last:

You can specify the number of instances in Visual Studio but then upload the modified package to change the actual deployment on the cloud. Bit cumbersome but I guess not something you would do often

Update : Just found a simpler way. You can change the number of instances simply by editing the configuration in the management portal......