For the full year 2014, cloud IT infrastructure spending totalled a whopping $26.4 billion, up 18.7 per cent year-on-year from $22.3 billion.
Western Europe had the highest growth in cloud IT infrastructure spending, with 30 per cent year-on-year growth.
Private cloud spending in 2014 overall reached just under $10 billion, up 20.7 per cent year-on-year, while public cloud spending was $16.5 billion, up 17.5 per cent year-on-year.
In Q4 2014, the US had the highest share of overall cloud IT infrastructure spending with 64 per cent, followed by Asia/Pacific (excluding Japan) with 17 per cent and Western Europe with 12 per cent.
Total cloud IT infrastructure spending (including server, disk storage, and ethernet switch) grew by 14.4 per cent year-on-year to $8 billion in the fourth quarter of 2014.
This accounted for approximately 30 per cent of all IT infrastructure spend, up from about 27 per cent one year ago, according to IDC data.
Private cloud infrastructure spending grew by 18.3 per cent year-over-year to $2.9 billion, while public cloud infrastructure spending grew to $5 billion, 12.3 per cent higher than one year ago.
"The transition to cloud-oriented infrastructure and data platform architectures within enterprises' data centers continues to accelerate, yet the expansion of public cloud infrastructure in service providers' data centres around the world is an even larger driver of IT spending," said Richard Villars, VP for data centre and cloud research at IDC.
"A key driver of this acceleration is organisations' development and use of new Internet of Things services that require levels of agility and scale that only cloud solutions can deliver."
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