How much do you feel that outages / lost data cost you?
How much is your time worth while managing your own servers & network?
How much do you feel that outages / lost data cost you?
How much is your time worth while managing your own servers & network?
Also, losing $50,000 in business because of a supplier or subcontractor failure is not an opportunity cost.
At least you get $500 - with an onsite, self-owned infrastructure outage, you lose that $50k...and get nothing but pain and direct blame!
AWS outages in one zone do sometimes affect other zones too, so it is not disaster proof:
http://www.zdnet.com/amazon-web-services-the-hidden-bugs-tha...
Cloud computing is no different than anything else in computer hardware/enterprise. You need to have redundancy.
The rest is optimization, monitoring, backups and service management, all of which you have on AWS as well.