vSphere 5.5 improvement

VMware vSphere 5.5 introduces many new features and enhancements to further extend the core capabilities of the virtualization platform.

vSphere ESXi Hypervisor Enhancements

·                     Hot-Pluggable SSD PCI Express (PCIe) Devices

·                     Support for Reliable Memory Technology

·                     Enhancements for CPU C-States

Virtual Machine Enhancements

·                     Virtual Machine Compatibility with VMware ESXi™ 5.5

·                     Expanded vGPU Support

·                     Graphic Acceleration for Linux Guests

VMware vCenter Server Enhancements

·                     VMware® vCenter™ Single Sign-On

·                     VMware vSphere Web Client

·                     VMware vCenter Server Appliance™

·                     vSphere App HA

·                     vSphere HA and VMware vSphere Distributed Resource Scheduler™ (vSphere DRS)

·                     Virtual Machine–Virtual Machine Affinity Rules Enhancements

·                     vSphere Big Data Extensions

vSphere Storage Enhancements

·                     Support for 62TB VMDK

·                     MSCS Updates

·                     vSphere 5.1 Feature Updates

·                     16GB E2E support

·                     PDL AutoRemove

·                     vSphere Replication Interoperability

·                     vSphere Replication Multi-Point-in-Time Snapshot Retention

·                     vSphere Flash Read Cache

vSphere Networking Enhancements

·                     Link Aggregation Control Protocol Enhancements

·                     Traffic Filtering

·                     Quality of Service Tagging

·                     SR-IOV Enhancements

·                     Enhanced Host-Level Packet Capture

·                     40GB NIC support

More details : http://www.vmware.com/files/pdf/vsphere/VMware-vSphere-Platform-Whats-New.pdf