Χαρακτηριστικό
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Περιγραφή
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Active/Active File Share Clusters
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Using CSV and a witness as features, you can create an active/active file share failover cluster. This is supported for services that use large file with little metadata access, e.g. Hyper-V. In other words, you can use a file share cluster instead of a SAN for your Hyper-V cluster.
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Asymmetric Hyper-V Cluster
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A single cluster with Hyper-V and Active/Active File Server roles
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BitLocker & HA
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The ability to encrypt parent partition disks and cluster shared volumes using BitLocker for physical security of virtual machines and data. Uses a Cluster Name Object (CNO) for locking and unlocking CSVs.
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Boot From SAN
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VMs can boot from iSCSI or Fibre Channel disks, rather than just the traditional VHD(X)
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Cluster Aware Updating
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Automate the Windows Update process for clustered hosts. It automatically drains hosts of VMs and patches them in order.
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Cluster Scalability
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Up to 63 hosts and up to 4,000 VMs
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Concurrent Live Migration
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Perform many live migrations at once between two hosts, with the only limit being your bandwidth.
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Converged Fabrics
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Simplified host networking by merging all of the various LAN, SAN, and cluster networks to a reduced number of teamed high bandwidth NICs.
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CSVFS
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CSVs are easier to backup. Although they are still NTFS, they appear as CSVFS for easier identification as CSVs in disk administration tools.
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Data Center Bridging
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DCB enables very different networking protocols to run on the same network infrastructure, and therefore helps enable the convergence of LANs and SANs onto a single unified fabric.
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Dedup & Thin Provisioning
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Windows 8 can use just the storage space that is required by not needlessly storing “empty” space (thin provisioning) or redundant data (de-duplication)
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DHCP Guard
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Ban DHCP traffic from rogue DHCP services running in VMs.
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Direct I/O Backup
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VMs on Cluster Shared Volumes (CSVs) can be backed up without Redirected I/O (Mode/Access).
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Drain VMs
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Easy host maintenance by draining VMs from the host
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Dynamic Memory Minimum Memory
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Once a VM has booted it can balloon down to the Minimum setting if it is underutilising the memory allocated by the Startup setting.
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Dynamic Virtual Machine Queue
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DMVQ will dynamically span processing VMQ n/w traffic across more than one CPU. It will automatically scale up and scale down the CPU utilisation based on demand
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Extensibale Hyper-V Switch
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Replacing the virtual network, this intelligent virtual switch offers extensibility for partners, with products already announced by the likes of Cisco and Brocade.
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Failover Prioritisation
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Order the failover of VMs based on application dependencies.
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Guest Application Monitoring
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Configure Failover Clustering to restart or failover VMs based on monitored events that occur inside of the VM.
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Guest NUMA
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Virtual machines are aware of Non-Uniform Memory Architecture and can schedule processes in accordance with memory placement at the physical layer. Guest NUMA can be customised on a per-VM basis.
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High Availability
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A feature of Failover Clustering, allowing a service or VM to failover from one host to another, enabling machine fault tolerance and maintenance windows with minimised service downtime.
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Host Scalability
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160 physical logical processors, up to 2 TB RAM, removal of the 8:1 logical to virtual processor limit.
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Hyper-V Replica
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Asynchronous replication of virtual machines from one location to another, supporting VSS snapshots, failover, and IP address injection.
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IPsec Task Offload
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IPsecTO moves this workload from the main host’s CPU to a dedicated processor on the network adapter
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Live Migration
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Move a virtual machine from one host to another. This does not require Failover Clustering in Windows Server 8.
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Live Storage Migration
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Physically relocate a VM by first copying it and synchronising I/O until the source and destination are identical. Can leverage Offloaded Data Transfer (ODX) in a SAN to make the process up to 90% faster.
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Multi-Tenancy
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With features such as Network Virtualisation, PVLANs, and PORT ACLs, you can use Windows 8 Hyper-V in multi-tenant environments such as IaaS public cloud hosting.
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Native 4k disk support
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This will allow disk alignment for VHDs created on 4k sector physical disks, thus improving performance.
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Network Virtualisation
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The abstraction of virtual IP address from physical IP address, allowing easier mobility of VMs across fabrics. This is a key feature of multi-tenancy.
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NIC Teaming
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Team NICs in Windows Server 8 (and Hyper-V) for bandwidth aggregation and network path fault tolerance. The NICs do not need to be from the same manufacturer.
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Online Disk Repair
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Windows 8 will detect storage faults and incrementally fix them with brief delays to I/O traffic that don’t interrupt it. Should replace the need for offline chkdsk.
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Port ACLs
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Define allowed communication paths between virtual machines based on IP range or MAC address.
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PowerShell
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Hyper-V has around 150 built-in PowerShell cmdlets. 100% of features are revealed via PowerShell.
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PVLAN
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VLANs are slow to configure in the physical network and there is a limit on how many can be configured. Private VLANs allow Hyper-V to replace this physical networking feature.
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QoS
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Specify maximum limits and minimum guarantees for network communications.
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Receive Side Coalescing
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RSC aggregates packets from the same TCP/IP flow into one larger packet, reducing per-packet processing costs for faster TCP/IP processing
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Receive Side Scaling
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RSS allows the receive side network load from a network adapter to be shared across multiple processors
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Remote Direct Memory Access
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RDMA enables more efficient access of data on file shares.
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Resource Metering
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Measure CPU, network and memory on a per-VM basis. This data is stored with the VM and moves with the VM.
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Single Root I/O Virtualisation
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SR-IOV allows a physical NIC to appear to be a number of physical NICs, and allows virtual machine networking to bypass the virtual switch.
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SMB 2.2
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SMB 2.2 supports RDMA and is in Windows Server 8. Storage of VMs is supported on SMB 2.2. file shares. With NIC teaming, you get multi-channel SMB.
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Snapshot Live Merge
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You do not have to shut down a VM to merge a snapshot in Windows 8, resolving a major support issue.
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Storage Pools
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An aggregation of disks without any RAID. They can be as loosely coupled as a bunch of USB drives. The disks can be different sizes. A pool does not appear in Explorer. You can create Storage Spaces from Storage Pools. This is one of the storage types you could use to create a scalable and continuously available active/active file share cluster.
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Storage Spaces
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A thinly provisioned slice of storage from a storage pool. Can be a 2-copy-mirror (Like RAID 1 in concept and performance), 3-copy-mirror, or parity (like RAID 5 in concept and performance) storage space. Can be lots of spaces in a single pool. A space is divided up into slabs across disks in the pool depending on the fault tolerance chosen. Advanced configuration allows you to choose which pool disks to use.
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Unified Tracing
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Enables network diagnostics in the Hyper-V Extensible Switch
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VHDX
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The default virtual disk type, expanding up to 16 TB, and supporting dynamic and fixed types.
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Virtual Fibre-Channel Adapter
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A host’s fibre channel adapter can be virtualised, thus enabling VMs to have their own WWN and direct access to the SAN.
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Virtual Machine Scalability
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32 virtual processors, 512 GB RAM
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Virtualisation Aware Domain Controllers
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Windows Server 8 domain controllers are aware if they are Windows 8 Hyper-V VMs. This prevents USN rollback (VM restore or snapshot application).
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Windows 8 Client
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Hyper-V is included in the client operating system for free. It’s the same Hyper-V as in the server, offering VM mobility and an easy introduction to Microsoft’s enterprise virtualisation. The client version of Hyper-V requires Second Level Address Translation (SLAT) in the CPU (Intel EPT, AMD RVI/NPT). This is not a requirement in the server version, but it is recommended.
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