If you were to be asked, out of all the server operating systems on the market, which platform had the highest reliability (in terms of downtime), what would your guess be?

We're talking all of the heavy hitters, mind you: Linux, Unix and even some Windows versions thrown in. Still not sure? According to the Yankee Group's second annual 2007-2008 Server OS Reliability Survey, the hands-down winner for reliability is ...

IBM's AIX.

Conducted by the Yankee Group and first reported by the Institute for Advanced Professional Studies, the independent survey examined 700 users in 27 countries to measure the hourly per year downtime of all of the major server operating systems. The summary of the survey reveals some telling information about the state of reliability in the server space today.

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