>>> a cost of about 1.5$ / hour for a 3 year plan That's about 1.000$ a month >>> But they have three database servers, so we are probably talking about arou

>>> a cost of about 1.5$ / hour for a 3 year plan That's about 1.000$ a month >>> But they have three database servers, so we are probably talking about around a thousand requests per second overall. Not that I disagree with the overall tone of your post, but you don't really need to spend that money to serve requests at this rate and latency. MySQL is good enough for this. With HandlerSocket [1], even more so. [1] https://www.percona.com/doc/percona-server/5.5/performance/handlersocket.html https://www.percona.com/doc/percona-server/5.5/performance/h...