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A study from VeriTest, commissioned by Microsoft, found that in a complex four-day test the Windows Server 2003 environment had 4 hours 20 minutes 19 seconds average end-user service loss time. This compared to 4 hours 59 minutes 44 seconds of average service loss time for the Red Hat Enterprise Linux AS 3.0 environment.
Katrina Teague, vice-president of marketing and solutions at VeriTest, said, "We simulated a medium-sized business environment with two independent teams of IT professionals... so the results of this study are consistent with the experience of many users in the real world."
The report said, "In our tests, more work was completed in the Windows Server 2003 environment than in the Red Hat Enterprise Linux AS 3.0 environment."
However, a US survey of 509 organisations by analyst firm Yankee Group found that the hourly cost of Windows downtime was three- to four-times higher than that of Linux server downtime.
Yankee Group said, "We discovered from users that server operating systems are largely commoditised. They report a high degree of satisfaction with the baseline performance and reliability of all the major server operating systems - Linux, Windows and Unix."