A new white paper, “VMware vSphere 5.1 vMotion Architecture, Performance and Best Practices”, is now available. In that paper, we describe the vSphere 5.1 vMotion architecture and its features. Following the overview and feature description of vMotion in vSphere 5.1, we provide a comprehensive look at the performance of live migrating virtual machines running typical Tier 1 applications using vSphere 5.1 vMotion, Storage vMotion, and vMotion. Tests measure characteristics such as total migration time and application performance during live migration. In addition, we examine vSphere 5.1 vMotion performance over a high-latency network, such as that in a metro area network. Test results show the following:

  • During storage migration, vSphere 5.1 vMotion maintains the same performance as Storage vMotion, even when using the network to migrate, due to the optimizations added to the vSphere 5.1 vMotion network data path.
  • During memory migration, vSphere 5.1 vMotion maintains nearly identical performance as the traditional vMotion, due to the optimizations added to the vSphere 5.1 vMotion memory copy path.
  • vSphere 5.1 vMotion retains the proven reliability, performance, and atomicity of the traditional vMotion and Storage vMotion technologies, even at metro area network distances.

Source: VMware.com