The downtime experienced by Windows Server 2003 increased 25 percent to nine hours per server per year, while the reliability of mainstream server-based Linux distributions improved significantly, according to a Yankee Group survey.
The research firm's survey also noted a significant rise in enterprise interest in Ubuntu, previously known primarily as a desktop operating system.
The 2007-2008 Global Server Operating System Reliability Survey presents a substantially different picture compared to the results of the last such survey in 2006, in which Windows administrators reported less downtime than their counterparts who used Linux -- a result that stirred up controversy at the time.
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