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More than half of large companies plan to migrate to public cloud systems in the coming two years, according to a new report from migration and disaster recovery provider CloudEndure.

The survey, which polled more than 250 global IT professionals in the first quarter of 2016, found that across organisations of all sizes, public clouds and private clouds are set to grow 22% and 15% in year over year for the coming two years. Virtual and physical machines, by contrast, are expected to drop by 25% and 31% respectively.

The main drivers for migration, according to survey respondents, were high availability, reliability, and cost, while the primary considerations for choosing a platform were in order reliability, high availability, and security and compliance.

Amazon Web Services (AWS) is out in front for production workloads with 42%, ahead of VMware (29%), with physical machines perhaps surprisingly being the next most popular option (7%). Microsoft’s Azure (4%) and Hyper-V (3%) comparatively struggled. The top migration workloads being web testing and development, web applications, and websites and databases.

“Our annual data migration survey reveals significant shifts across the landscape, with large-scale cloud adoption and reductions of virtual and physical servers as organisations recalibrate how they want to run their businesses and manage their applications and data to remain competitive,” said CloudEndure CEO Ofer Gadish.

Elsewhere, a report from the Cloud Security Alliance has sent out warning signs to firms over data security. 22% of survey respondents said their data breach was due to compromised credentials, while 65% gloomily admitted the chance of a repeat occurrence was “medium to high.” Despite this however, there were no major differences in terms of security between companies who had and had not reported a data breach respectively.

You can find more about the CloudEndure study here.