7. 2011年 サーバー市場: Linuxだけが成長
Linux server demand was positively impacted by high performance
computing (HPC) and cloud infrastructure deployments, as hardware
revenue improved 2.2% year over year in 4Q11 to $2.6 billion.
Linux servers now represent 18.4% of all server revenue, up 1.7
points when compared with the fourth quarter of 2010.
Microsoft Windows server demand subsided slightly in 4Q11 as
hardware revenue decreased 1.5% year over year. Quarterly
revenue of $6.5 billion for Windows servers represented 45.8% of
overall quarterly factory revenue, up 2.6 points over the prior year's
quarter.
Unix servers experienced a revenue decline of 10.7% year over
year to $3.4 billion representing 24.2% of quarterly server revenue for
the quarter. IBM grew Unix server revenue 2.5% year-over-year and
gained 7.9 points of Unix server market share when compared with
the fourth quarter of 2010.
(Despite a 7.2% Decline in Fourth Quarter Revenue,
Worldwide Server Market Revenues Increase 5.8% in 2011,
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