Virtual Three Musketeers special-hyper-v (middle)

Hyper-V offers a wide range of operating system support (including 32/64-bit OS, such as Windows, Linux, etc.), virtual VLAN support (VLAN partitioning of virtual machines in virtualized environments to ensure mutual isolation of information between virtual machines), Includes new virtual switching capabilities (running the Windows Network Load Balancing service to balance the load on multiple VMs on different servers).

Hyper-V provides extended development frameworks and APIs that enable enterprises to incorporate their own unique hardware devices into a virtualized platform, providing virtualization services to virtual machines ; Providing a standard Windows management Architecture (WMI) interface and API interface enables software vendors and developers to quickly create custom tools and scripts to manage virtualized platforms.

Hyper-V Operations and management

Hyper-V and System Center are consolidated and integrated. Combined with scom, administrators can monitor all aspects of the performance of the host server, as well as the performance of the virtual machine in an equally efficient and meticulous manner. In reducing the workload of the Administrator, while effectively monitoring the system health; As described earlier, Hyper-V clusters are managed through SCVMM.

• SCVMM heterogeneous Virtual Machine Management: You can manage virtual machines running on VMware ESX and Citrix.

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• SCVMM support for virtual machine conversions: Converts a physical machine in SCVMM into a P2V of Hyper-V (VHD), and a V2V transformation that transforms a VMware VMDK into a VHD. Use VSS to ensure data consistency in P2V migration replication.

• Virtual Machineconverter: provides V2V virtual machine conversions that convert VMS, virtual machine disks, and configurations (memory, virtual processors, and so on) from sources to Hyper-V from the source.

Hyper-V Basic features

• startup RAM:

  Max RAM:

  memory buffers:

• Virtual Host Snapshots: Hyper-V integrates with the Volume Shadow Copy Service (VSS), enabling administrators to create a point-in-time (point-in-time) snapshot of a running virtual machine. virtual machine live snapshots do not affect the running state of virtual machines, and take snapshots of any VM and business. Hyper-V also provides a storage address for choosing a storage snapshot, and Hyper-V pauses the VM to ensure data consistency before creating the snapshot, then creates a differencing disk for the VHD, copies a copy of the VM's configuration file, and finally runs the VM to save the snapshot contents of the VM to disk.

• Virtual machine cloning: supports the dynamic generation of IDs to ensure that both the original VM and the cloned VM are logically two VMs.

Hyper-V Storage:

Hyper-V support adding/removing VHD disks to VMs does not require a restart of the VM. In terms of storage morphology, Hyper-V supports Das, nfs/cifs, and pass-through-mode storage.

VM supported disk types: fixed (initial allocation required capacity), dynamic (can dynamically grow to maximum capacity) and differentiated (similar to VMware's disk link clones, The newly created VM creates a differencing disk based on the VM template.

• hyper-v support 4K disks:

• thinprovisioning Space Reclaim support:

• hyper-v support Npiv Features: A storage LUN can be pass-through to the VM through the FC link. However, it is generally required that the HBA card (virtual multiple HBA cards) and switch/storage also support the NPV feature so that the VMS are assigned WWN and fcid for communication.

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• support for ODX virtual machine Offload Uninstall feature: The server initiates the unload request, the SAN initiates the response token, the server uses the token to initiate the write request, the San external storage responds to the data copy, and the San responds to the server copy.

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• Cluster Shared Volumes (CSV): the Hyper-V-based shared mirroring feature enables the Hyper-V server cluster to access a volume at the same time, improving storage access efficiency.

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• Hyper-V data deduplication features: Save storage space by repeating data lookups and deletions based on the Hyper-V virtual Library in Windows Server.

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• Hyper-V to SMB3.0 (CIFS) Support: after Windows Server-Hyper-V is launched, it claims to support the external NAS (SMB 3.0 must be supported). In San external storage, one LUN for one or more virtual machine disk files, the operation of the virtual machine is in LUNs (VMware introduces Vvol to resolve this issue). Compared to SAN storage, NAS has a certain management advantage, the corresponding files for each virtual machine is visible to the NAS, and the granularity of the VM file can be managed.

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1) SMB3.0 transparent failover Transparent Failover: In an SMB cluster with two or more nodes, when there is a node failure, the client automatically re-initiates the connection to another node without disrupting any business. This feature relies on the functionality of the SMB cluster, where the client link is not interrupted during a fail-transparent switchover, and only the information (such as IP, status, etc.) on the internal nodes of the cluster can be transferred and synchronized.

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2) SMB3.0 witness mechanism: without the SMB witness scenario, the client can only rely on slow detection mechanisms (such as timeouts) to fail over and be inefficient. Witness service needs to rely on the monitoring function of the cluster, when the cluster has a node state change, the cluster will notify the witness service, and then by the witness service notify the client, fast business switching.

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3) SMB3.0 multi-channel multi-channel: allows multiple network connections to be used concurrently between the client and the server. On the basis of multiple network connections, the client and server can transmit larger amounts of data, which increases the network throughput capacity. This feature allows you to continue working with some of these network connections interrupted, adding fault tolerance.

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4) SMB3.0 Remote Direct access: Remote Direct Memory Access (RDMA) is a DMA technology that allows data to be transferred directly from one computer's memory to the memory of another computer without the operating system, enabling high bandwidth, low latency performance with less CPU usage.

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5) SMB to VSS service support: is a Microsoft A snapshot mechanism provided for the Windows operating system. Primarily serves the backup requirements. The shadow copy of VSS is provided by the SMB3.0 server, without affecting the existing volume access, the backup client can complete the backup process through shadow copy (server free backup mode, backup server by mount snapshot backup), the application host does not participate in the backup data transfer process, Can reduce the load on the application host.

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This article from the "ICT Architects Technical Exchange" blog, declined to reprint!

Virtual Three Musketeers special-hyper-v (middle)