[CubsFan1060]

I suspect it's likely that the services that the other posters use _do_ have downtime, they are just done at hours where they don't notice them.

I would literally have no idea if gmail went down from 1-2 am any day of the week. Hell. I wouldn't notice if it was down everyday from 1-2am.

[ljm]

If you've got planned maintenance that requires downtime then you are always scheduling it at the times when your traffic is at its lowest. How much you avoid hard downtime is a function of how much money you're willing to spend on the maintenance.

[CubsFan1060]

Or how much revenue will be reduced by downtime.