Market for Unix and non-x86 machines declines, even as server sales make biggest gains since 2003 Demand for Windows and Linux servers is increasing at a rapid pace, at the expense of Unix servers and other non-x86 machines, according to IDC.“Microsoft Windows server demand was positively impacted [in Q2 2010] by the accelerating x86 server market, as hardware revenue increased 6.7 percent and unit shipments increased 28.2 percent year over year,” IDC says.[ Discover what’s new in business applications with InfoWorld’s Technology: Applications newsletter and Killer Apps blog. ] Microsoft: ‘We love open source’Windows-based servers raked in $5 billion in quarterly revenue, representing 46.5 percent of worldwide server factory revenue. But there was room for both Windows and its rival Linux to be declared winners in the second quarter.Linux-based server revenue grew 30.1 percent to $1.8 billion year-over-year. “Linux servers now represent 16.8 percent of all server revenue, up 2.5 points over 2Q09,” IDC says. Overall, server sales posted their biggest jump since 2003, with an 11 percent increase in revenue and a 24 percent increase in server unit shipments.The demand is mainly being driven by x86 systems. “IDC expects the recovery to extend to Unix and mainframe platforms in the second half of 2010,” the research firm says. But in the second quarter, Unix server revenue declined 7.3 percent year-over-year “as customers waited for details about the IBM Power Systems servers.”The total market for non-x86 servers declined 16 percent to $3.9 billion in quarterly revenue. Among systems vendors, HP led the way with $3.5 billion in revenue, followed by IBM with $3.2 billion and Dell at $1.7 billion.Follow Jon Brodkin on Twitter: www.twitter.com/jbrodkinRead more about data center in Network World’s Data Center section. Technology IndustrySoftware DevelopmentSmall and Medium Business