Virtually no mention of how the different server setups affect availability - this is very unfortunate. Availability (not to mention disaster recovery) are two things which I think are significantly more important than scaling, and your choice of server setup will affect both.
Yup: Uptime. In the face of a box rebooting unexpectedly because it's a VPS. In the face of a data center experiencing connectivity issues. In the face of Hurricane Sandy's big brother.
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Virtually no mention of how the different server setups affect availability - this is very unfortunate. Availability (not to mention disaster recovery) are two things which I think are significantly more important than scaling, and your choice of server setup will affect both.
What do you mean with availability?
I think by availability he means uptime. Whether your site is always available, or there are times when your site is down, and how long are they.
Yup: Uptime. In the face of a box rebooting unexpectedly because it's a VPS. In the face of a data center experiencing connectivity issues. In the face of Hurricane Sandy's big brother.