What would generally be your expectation for SLA uptimes across the following services in a given month for a 'normal' scenario?
I'm including my expectations... the purpose of this question is to find out what the standard baseline should be in 2009 for setting SLA goals in an IT infrastructure. (Again, in a normal scenario - we're not talking Amazon or Google, but then again we're not talking Billy Bob's Web Site hosted on home DSL either.)
- Power (100%)
- Network / Core Routing / Switching (99.999%)
- Static Files Hosting (99.99%)
- Application Hosting [Single Server / DB] (99.95%)
- E-Mail Hosting (99.95%)
- Complex Application Hosting / Platform [Multiple Servers / DBs / Services] (99.9%)
(For reference... SLA Calculator)
And finally... How much maintenance time is acceptable within a month?