Every Hypervisor is Not Created Equal

Avoid unnecessary risk and overhead by choosing a robust and production-proven hypervisor as the foundation for your virtualized datacenter. Selecting the right hypervisor is the first step towards success in building a virtual infrastructure.

Not all hypervisors are equal. Learn more about how VMware vSphere® Hypervisor is - and will continue to be - the industry's most robust and production-proven hypervisor and why VMware is the best choice for building a virtual infrastructure.

Comparing Hypervisors

Hyper-V and Xen Architectures: Too Much Code

Achieve Scalable Performance

Virtualization-Aware Networking and Security Solutions

Industry Recognition

Comparing VMware vSphere and Microsoft Hyper-V

VMware vSphere—the industry’s first x86 “bare-metal” hypervisor—is the most reliable and robust hypervisor. Launched in 2001 and now in its fifth generation, VMware vSphere has been production-proven in tens of thousands of customer deployments all over the world.

Other hypervisors are less mature, unproven in a wide cross-section of production datacenters, and lacking core capabilities needed to deliver the reliability, scalability, and performance that customers require.

VMware is the clear and obvious leader in virtualization products. We tried both the Microsoft and Oracle virtualization products and found them lacking in features and performance compared to the VMware product.

David Greer, Director of Information Services, HelioVolt Corporation

So while others try to catch up to VMware in the areas highlighted below, VMware’s continuing enhancements are taking vSphere to the next level of enterprise-class hypervisors needed to deliver the Software-Defined Data Center—further extending VMware's lead and ensuring that VMware customers obtain unparalleled levels of performance and reliability.

Hypervisor Attributes VMware vSphere 5.5 Windows Server 2012 with Hyper-V
Small Disk Footprint

<200MB disk footprint

>5GB with Server Core installation

~10GB with full Windows Server installation
OS Independence

No reliance on general purpose operating system

Relies on Windows 2012 in Parent Partition
Hardened Drivers

Optimized with hardware vendors

Generic Windows drivers
Advanced Memory Management

Ability to reclaim unused memory, de-duplicate memory pages, compress memory pages, swap to disk/SSD

Only uses ballooning, requires special drivers—no Linux, no NUMA
Advanced CPU Management

Tuned to support Intel SMT hyper-threading; Supports 3D graphics accelerators

No reliable performance advantage when using hyper-threading
Advanced Storage Management

Lacks an integrated cluster file system
Virtual Security Technology

vCloud Networking and Security Enables hypervisor level security introspection

Minimal adoption of their security standard. 3rd party plug-ins required
Flexible Resource Allocation

Hot add VM vCPUs and memory, VMFS volume grow, hot extend virtual disks, hot add virtual disks

Nothing comparable
Simplified Patching

No unrelated patching; Image-based patching with rollback capabilities provide clean and simple host patching

Subject to frequent patching related to the OS; Complex patching architecture requires additional effort and complexity