Yes, people should evaluate ha needs in terms of business needs: what happens if my website goes down? Will I lose money? How much money? "How much money?" Is

Yes, people should evaluate ha needs in terms of business needs: what happens if my website goes down? Will I lose money? How much money? "How much money?" Is probably the most import question, as it actually helps in evaluating if there's a business case for investing into the financial commitment, engineering effort and maintenance burden of an ha solution. On a different note, I've seen mysql-based multi-master setups and it's really a joy to be able to treat a mysql crashing as a minor annoyance instead of a call to fire-fighting.