It is still a bifurcated market though, with VMware's ESX hypervisor holding a dominant position. But Hyper-V is catching up and is growing market share, according to Bowker and Litkey. "In the majority of use cases, both solutions are very solid," Bowker says. "VMware still has a very significant footprint, but Microsoft has the potential to disrupt."
Microsoft makes the case that its management tools, like Windows Server and Systems Center, are part of a broader "Cloud OS" strategy that includes the company's Azure public cloud, as well as offerings from cloud service providers using the Microsoft platform.
"Microsoft is the only company that offers customers the flexibility of a consistent hybrid cloud platform that spans customer datacenters, hosted service provider datacenters and the Microsoft public cloud," a Microsoft spokesperson wrote in an email. "Customers can use the same core technologies - including virtualization, systems management, identity, development tools and database - across all three clouds."
Where are the cloud providers?
But Bowker says Microsoft has not done as good of a job as VMware, OnApp and OpenStack supporters at getting third-party providers to use its cloud management technology as the basis for their offerings. Microsoft points to providers like OVH and Hitachi Systems as being among cloud service providers using Cloud OS, but there's a decided lack of brand-name providers using it.
"Microsoft's Cloud OS strategy is triangular, but it really focuses on the on-premises and Azure services," Bowker says. VMware, meanwhile, has more than 100 providers using vCloud Director as the basis for their clouds, including providers it lists on its website such as Bluelock, CSC, Dell, Internap, NaviSite and Savvis.
Embotics CEO Litkey says Hyper-V as a virtualization platform still has a ways to go to catch market-leading VMware ESX. While Hyper-V improved in the last year and is a stable, solid platform, ESX outdoes it in areas such as resource contention -- distributed resource scheduling (DRS) and vMotion, for example -- as well as in automation, scheduling, affinity provisioning, memory sharing and compression.
Still, analyst Bowker says in most cases Hyper-V is a "good enough" alternative to ESX, especially since it's included at no additional cost with a Windows Systems Center license, making Hyper-V more attractively priced than VMware in many circumstances. Combined with powerful new management tools in Systems Center and Windows Server, specifically related to managing large-scale environments, Hyper-V is giving more IT professionals a reason to look at the Microsoft virtualization platform, he says.
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