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Windows Server 2008 Hyper-V Boundaries: Some quick facts - Windows Server blog by Kurt Roggen [BE]
donderdag 9 oktober 2008 0:49 Kurt Roggen

Windows Server 2008 Hyper-V Boundaries: Some quick facts

A lot of people are unclear of what physical and/or virtual hardware Hyper-V supports.
The elements below help you to plan, purchase and build your physical and virtual infrastructure.

Processor

Memory

  • For Windows Server 2008 Enterprise and Windows Server 2008 Datacenter, the physical computer can be configured with up to 1 TB of physical memory, and virtual machines that run these editions can be configured with up to 64 GB of memory per virtual machine.
  • For Windows Server 2008 Standard, the physical computer can be configured with up to 32 GB of physical memory, and virtual machines that run either of those editions can be configured with up to 31 GB of memory per virtual machine.

Networking

  • Each virtual machine can be configured with up to 12 virtual network adapters - 8 can be the synthetic “network adapter” type and 4 can be the “legacy network adapter” type. The network adapter type provides better performance and requires a virtual machine driver that is included in the integration services packages.
  • Each virtual network adapter can be configured with either a static or dynamic MAC address.
  • Each virtual network adapter offers integrated virtual local area network (VLAN) support and can be assigned a unique VLAN channel.
  • You can have an unlimited number of virtual networks with an unlimited number of virtual machines per virtual network.

Storage

  • Hyper-V can use 4 storage options such as Fiber Channel attached, iSCSI attached, Direct attached (DAS), NAS, SMB/CIFS file share.
  • Virtual hard disks of up to 2040 GB. You can use fixed virtual hard disks, dynamically expanding virtual hard disks, and differencing disks.
  • Virtual IDE devices. Each virtual machine supports up to 4 IDE devices. The startup disk (sometimes referred to as the boot disk) must be attached to one of the IDE devices. The startup disk can be either a virtual hard disk or a physical disk.
  • Virtual SCSI devices. Each virtual machine supports up to 4 virtual SCSI controllers, and each controller supports up to 64 disks. This means that each virtual machine can be configured with as many as 256 virtual SCSI disks.
  • Physical disks. Physical disks attached directly to a virtual machine (sometimes referred to as pass-through disks) have no size limitation other than what is supported by the guest operating system.
  • Virtual machine storage capacity. Using virtual hard disks, each virtual machine supports up to 512 TB of storage. Using physical disks, this number is even greater depending on what is supported by the guest operating system.
  • Virtual machine snapshots. Hyper-V supports up to 50 snapshots per virtual machine.

Virtual Machines

  • Hyper-V supports up to 192 virtual machines running simultaneous.
  • Hyper-V supports up to 512 virtual machines.
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