Cloud IT infrastructure passes traditional IT infrastructure

According to the International Data Corporation (IDC) Worldwide Quarterly Cloud IT Infrastructure Tracker, vendor revenue from sales of IT infrastructure products (server, enterprise storage, and Ethernet switch) for cloud environments, including public and private cloud, grew 47.2% year over year in the third quarter of 2018 (3Q18), reaching $16.8 billion. IDC also raised its forecast for total spending (vendor revenue plus channel mark-up) on cloud IT infrastructure in 2018 to $65.2 billion with year-over-year growth of 37.2%.
Quarterly spending on public cloud IT infrastructure has more than doubled in the past two years reaching $12.1 billion in 3Q18 and growing 56.1% year over year, while spending on private cloud infrastructure grew at half of this rate, 28.3%, reaching $4.7 billion. 
Since 2013, when IDC started tracking IT infrastructure deployments in different environments, public cloud has represented the majority of spending on cloud IT infrastructure and in 2018 IDC expects this share will peak at 68.8% with spending on public cloud infrastructure growing at an annual rate of 44.7%. Spending on private cloud will grow 23.3% year over year in 2018.
In 3Q18, for the first time, quarterly vendor revenues from IT infrastructure product sales into cloud environments surpassed revenues from sales into traditional IT environments, accounting for 50.9% of the total worldwide IT infrastructure vendor revenues, up from 43.6% a year ago. However, for the full year 2018, spending on cloud IT infrastructure will remain below the 50% mark at 47.4%. 
Spending on all three technology segments in cloud IT environments is forecast to deliver double-digit growth in 2018. Compute platforms will be the fastest growing at 59.1%, while spending on Ethernet switches and storage platforms will grow 18.5% and 20.4%, respectively.
The rate of growth for the traditional (non-cloud) IT infrastructure segment slowed down from the first half of the year to 14.8%, which is still exceptional for this market segment. For the full year, worldwide spending on traditional non-cloud IT infrastructure is expected to grow by 12.3% as the market goes through a technology refresh cycle, which will wind down by 2019. 
By 2022, IDC expects that traditional non-cloud IT infrastructure will only represent 42.4% of total worldwide IT infrastructure spending (down from 52.6% in 2018). This share loss and the growing share of cloud environments in overall spending on IT infrastructure is common across all regions.
“The first three quarters of 2018 were exceptional for the IT Infrastructure market across all deployment environments and the increase in IT infrastructure investments by public cloud data centers was especially strong driven by the opening of new data centers and infrastructure refresh in existing data centers,” said Natalya Yezhkova, research director, IT Infrastructure and Platforms. “
After such a strong year we expect some slowdown in 2019 as the overall market cools down and some cloud providers work through adjustments in their supply chain. However, IDC expects the shift in IT infrastructure spending toward cloud environments will continue.”
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