Wednesday 20th May 2015: 4.01pm. Over the past two years my cloud infrastructure has had 10h 45m offline, or 99.94% reliability.
Over the past year my cloud infrastructure has had 1h 10m offline, or 99.9867% reliability.
That's not half bad for a hand rolled infrastructure made up of very cheap VPSs and very cheap dedicated servers! Total annual cost is €250 not including my home internet connection (my cloud straddles my home network via a VPN).