vsphere 4.1 - parte 3
29/07/2010 22:42Platform Enhancements
- Performance and Scalability Improvements. vSphere 4.1 includes numerous enhancements that increase performance and scalability.
- vCenter Server 4.1 can support three times more virtual machines and hosts per system, as well as more concurrent instances of the vSphere Client and a larger number of virtual machines per cluster than vCenter Server 4.0. The scalability limits of Linked Mode, vMotion, and vNetwork Distributed Switch have also increased.
- New optimizations have been implemented for AMD-V and Intel VT-x architectures, while memory utilization efficiency has been improved still further using Memory Compression. Storage enhancements have led to significant performance improvements in NFS environments. VDI operations, virtual machine provisioning and power operations, and vMotion have enhanced performance as well.
- Reduced Overhead Memory. vSphere 4.1 reduces the amount of overhead memory required, especially when running large virtual machines on systems with CPUs that provide hardware MMU support (AMD RVI or Intel EPT).
- DRS Virtual Machine Host Affinity Rules. DRS provides the ability to set constraints that restrict placement of a virtual machine to a subset of hosts in a cluster. This feature is useful for enforcing host-based ISV licensing models, as well as keeping sets of virtual machines on different racks or blade systems for availability reasons. See the vSphere Resource Management Guide.
- Memory Compression. Compressed memory is a new level of the memory hierarchy, between RAM and disk. Slower than memory, but much faster than disk, compressed memory improves the performance of virtual machines when memory is under contention, because less virtual memory is swapped to disk. See the vSphere Resource Management Guide.
- vMotion Enhancements. In vSphere 4.1, vMotion enhancements significantly reduce the overall time for host evacuations, with support for more simultaneous virtual machine migrations and faster individual virtual machine migrations. The result is a performance improvement of up to 8x for an individual virtual machine migration, and support for four to eight simultaneous vMotion migrations per host, depending on the vMotion network adapter (1GbE or 10GbE respectively). See the vSphere Datacenter Administration Guide.
- ESX/ESXi Active Directory Integration. Integration with Microsoft Active Directory allows seamless user authentication for ESX/ESXi. You can maintain users and groups in Active Directory for centralized user management and you can assign privileges to users or groups on ESX/ESXi hosts. In vSphere 4.1, integration with Active Directory allows you to roll out permission rules to hosts by using Host Profiles. See the ESX Configuration Guide and the ESXi Configuration Guide.
- Configuring USB Device Passthrough from an ESX/ESXi Host to a Virtual Machine. You can configure a virtual machine to use USB devices that are connected to an ESX/ESXi host where the virtual machine is running. The connection is maintained even if you migrate the virtual machine using vMotion. See the vSphere Virtual Machine Administration Guide.
- Improvements in Enhanced vMotion Compatibility. vSphere 4.1 includes an AMD Opteron Gen. 3 (no 3DNow!™) EVC mode that prepares clusters for vMotion compatibility with future AMD processors. EVC also provides numerous usability improvements, including the display of EVC modes for virtual machines, more timely error detection, better error messages, and the reduced need to restart virtual machines. See the vSphere Datacenter Administration Guide.
Partner Ecosystem
- vCenter Update Manager Support for Provisioning, Patching, and Upgrading EMC ESX PowerPath Module.vCenter Update Manager can provision, patch, and upgrade third-party modules that you can install on ESX, such as EMCs PowerPath multipathing software. Using the capability of Update Manager to set policies using the Baseline construct and the comprehensive Compliance Dashboard, you can simplify provisioning, patching, and upgrade of the PowerPath module at scale. See the vCenter Update Manager Installation and Administration Guide.
- User-configurable Number of Virtual CPUs per Virtual Socket. You can configure virtual machines to have multiple virtual CPUs reside in a single virtual socket, with each virtual CPU appearing to the guest operating system as a single core. Previously, virtual machines were restricted to having only one virtual CPU per virtual socket. See the vSphere Virtual Machine Administration Guide.
- Expanded List of Supported Processors. The list of supported processors has been expanded for ESX 4.1. To determine which processors are compatible with this release, use the Hardware Compatibility Guide. Among the supported processors is the Intel Xeon 7500 Series processor, code-named Nehalem-EX (up to 8 sockets).
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