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What's new in Windows Server 2012 R2


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What's new in Windows Server 2012 R2

  1. 1. Windows Azure Infrastructure-as-a-Service (IaaS) isbuilt on the same hypervisor as Windows Server. Thismeans that there is complete virtual machinecompatibility between the private cloud, partner publicclouds, and the Microsoft-owned public cloud.Customers can now decide “Where do I want myservice to run today?”
  2. 2. A compression engine is built into Live Migration in WindowsServer 2012 R2 Hyper-V. The CPU in hosts is oftenunderused, so this engine makes use of this spare resourceto compress the memory of virtual machines that are beingmoved before the memory pages are copied across the LiveMigration network. Hyper-V will monitor the utilization of CPUresources on the host and throttle compression to prioritizeguest services. Enabling Live Migration compression onnetworks with 10 Gbps or less without Remote DirectMemory Access (RDMA/SMB Direct) support will greatlyreduce the time it takes to move virtual machines (notincluding storage migration).
  3. 3. Live Migration can be configured to leverage SMB Direct (Remote DirectMemory Access, or RDMA) on hosts that that NICs with support for thisfeature. This feature will provide hardware offloaded accelerated copy ofmemory pages using SMB 3.0 NICs. This can take advantage of SMBMultichannel to span multiple networks. SMB Direct Live Migrationprovides the fastest way to live migrate virtual machines (not includingstorage) from one host to another. Memory speed will be the rarebottleneck on a host with PCI3 support and three RDMA NICs for LiveMigration! This feature allows very interesting new architectures,especially where organizations have decided to deploy SMB 3.0 storagewith support for SMB Direct. Investments in RDMA can be leveraged tomove virtual machines very rapidly over these physical networks (withQoS applied for SLA). For example, Cluster Aware Updating (CAU) will beperformed much more rapidly.
  4. 4. Virtual hard disks of the VHDX format that are attached to the SCSIcontrollers of virtual machines can be resized without shutting down thevirtual machine. VHDX files can be up- and down-sized. Downsizing canonly occur if there is unpartitioned space within the VHDX. This featuresupports both Windows and Linux guests.Live Resizing of VHDX files will be of huge value to those running missioncritical workloads. It will also offer a new self-service elasticity feature forclouds.
  5. 5. New storage metrics for IOPS have been added to WS2012 R2. Withthese metrics, you can determine the IOPS requirements of virtualmachines and put caps on storage activity. This will limit how muchphysical disk activity that virtual machines can create, and therefore limitthe damage that activity spikes can cause to other virtual machines andtheir guest services.One of the concerns with shared storage is the possibility of a race forstorage throughput. Enabling Storage QoS will limit the damage thatany virtual machine or tenant can do in a cloud.
  6. 6. WS2012 R2 Hyper-V allows you to clone a running virtual machine. Thiswill create an exact copy of the virtual machine that is stored in a savedstate. This feature supports GenerationID.That means you can use Live Virtual Machine Cloning to create ActiveDirectory supported clones of a virtual domain controller that is not thePDC Emulator.This feature will be useful for situations where you need to debug aproduction system or you want to perform tests, such as guest OSupgrades.
  7. 7. You can export a virtual machine with a checkpoint (formerly known as asnapshot)You can also export a checkpoint of a virtual machine.
  8. 8. Dynamic Memory will be supported in Linux Guest OS’s on WindowsServer 2012 R2 Hyper-V. This will give much better memory optimizationfor Linux virtual machines, and itll allow for much greater densities.Linux distributions with this built-in Linux Integration Services for Hyper-V HyH support are already available.There will be support for online backup of Linux guest OSs. This is notVolume Shadow Copy Service (VSS) for Linux, and it does not give anapplication consistent backup. Instead, a file system consistent backup iscreated by freezing the file system. This feature does require an upgradeof any already deploy Linux Integration Services.
  9. 9. You can configure up to 64 virtual machines to share a single VHDX fileon some shared storage (such as CSV or SMB 3.0). The VM sees theshared VHDX as a shared SAS disk with SCSI-3 persistent reservations.This is for data volumes to create guest clusters, and not for shared bootvolumes. It works with down-level guest OSs, such as W2008 R2 withthe WS2012 R2 Hyper-V Integration Components installed. This featureis supported by Service Templates in VMM 2012 R2.This will really simplify guest clustering, where virtual machines are usedto create a highly available service at the application layer. This couldeliminate the need for guest attachment to physical LUNs and will beaccommodating to self-service deployment within a cloud.
  10. 10. The default period for asynchronous replication of the Hyper-V Replica Log is every 5minutes, but this can be changed to every 30 seconds or every 15 minutes. This allowscompanies to choose the allowed recovery point objective (RPO) – the maximumallowed amount of data loss in time. Hyper-V Replica can now be extended to a thirdsite. This is an A-B-C extension, and not an A-B/A-C extension. For example, acompany might replicate virtual machines from the primary site to a local secondarysite. This might be configured to happen every 30 seconds. Replica virtual machines inthe secondary site might be replicated to a distant third site (such as a hostingcompany) maybe every 15 minutes. In the event of an unplanned failover, this wouldgive an RPO of 30 seconds in the secondary site and an RPO of 15 minutes and 30seconds in the third site. The performance and scalability of Hyper-V Replica has beenimproved. Maintaining historical copies of virtual machines in the secondary site iscostly (IOPS). This has been reduced, so maintaining historical copies of your replicaVMs will not punish your storage in the secondary site.
  11. 11. The criticized virtual machine connection of the past (VMConnect.exeprocess) is being replaced by a Remote Desktop experience that is builtinto the virtualization stack. This has no dependency on the virtualmachine’s networking. By default, this feature is disabled in WS2012 R2Hyper-V and enabled in Windows 8.1 Client Hyper-V. Things that RemoteDesktop VM Connect allow you to do include:Copy & paste text and images.Copy files to/from the client desktop.Do session-based USB redirection.This means you might use a USB stick to copy files.It is not a USB dongle solution.
  12. 12. You can live migrate a virtual machine from WS2012 Hyper-V to WS2012R2 Hyper-V. This could eliminate downtime when deploying WS2012 R2Hyper-V. For example, you can deploy a WS2012 R2 Hyper-V host/clusteralongside an existing WS2012 Hyper-V host/cluster. You can then livemigrate the virtual machines from the older platform to the new platformwith zero downtime to the availability of the services provided by thevirtual machines.Note that you cannot do a Live Migration downgrade from WS2012 R2Hyper-V to WS2012 Hyper-V. It is a one-way upgrade path.
  13. 13. This is the first time that Windows Server (and thus Hyper-V) is beingdeveloped with and released at or close to the same time as SystemCenter. There has been closer than ever before cooperation withinWindows Server and System Center (WSSC).That means you can deploy System Center immediately and follow it upwith WS2012 R2 Hyper-V, without the long delays of the past.
  14. 14. Similar to the StorSimple appliance, Windows Server 2012 R2 can measurethe “heat” of storage needs. “Hot” portions of files (block levels) aremoved to Solid State Drives (SSDs) and cold data to slower magneticdrives.This allows a favorable balance between capacity and performance.Administrators can assign files to specific storage tiers. This could be amaster “gold” vhd for a business customer.
  15. 15. Useful for connecting the on-premises datacenter to Windows Azure, thisfeature is now built into Windows Server 2012 R2.
  16. 16. 64 Tb is the addressable space of Windows Server 2012, and a .VHDX canbe 64 Tb in size. Now .VHDX virtual disks can be used with iSCSi inWindows Server 2012 R2.
  17. 17. Performance gains of over 50% can be had by having process awarenessof the common blocks that are referenced by deduplication.
  18. 18. If the parent partition is activated, and if it is running Windows Server2012 R2, the Windows Server 2012 R2 guest partition is automaticallyactivated without any intervention.
  19. 19. PowerShell 4.0 adds new cmdlets for:• VPN configuration• Start Screen customization• DISM• NAT• TPM• WMI• TCP/IP• Systems Management• Storage