Time for a review of Module 4 — Ensuring High Availability and Recoverability
This module mainly concentrates on Backup and Restore, Failover Clustering and VM Migration.
Exam 70–659 Revision Notes — Module 4
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VM Migration in SCVMM
SCVMM support four types of virtual machine migration from one host to another.
The migration types are:
| Quick Migration | Enables a Hyper-V virtual machine to be relocated from one virtual host to another with minimum downtime.
The downtime is directly related to the amount of memory assigned to the VM, as well as the speed of the connection between virtual hosts and shared storage. |
| SAN Migration | Available only when source and destination have access to the same LUN.
When you make a SAN transfer, the logical unit number (LUN) containing the virtual machine is remapped from the source computer to the destination computer instead of transferring the files over the network. Therefore, SAN transfers are much faster than standard network transfers and are independent of the size of the files being transferred. |
| Live Migration | Live migration allows you to transparently move running virtual machines from one node of the failover cluster to another node in the same cluster without a dropped network connection or perceived downtime.
Live Migration requires the failover clustering feature and Cluster Shared Volumes (CSVs) |
| Quick Storage Migration (QSM) | This migration technology uses the network to migrate the data.
QSM takes a snapshot of the running VM and starts transferring the data to the destination host whilst the VM is still running. The VM stays running as long as possible to minimise downtime. Only available in SCVMM 2008 R2. |
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Tagged live migration, Migration, QSM, Quick Migration, Quick Storage Migration, SAN Migration, scvmm, VMM
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Failover Clustering & Hyper-V
The Failover Clustering feature enables you to create and manage failover clusters. A failover cluster is a group of independent computers that work together to increase the availability of applications and services.
The clustered servers (called nodes) are connected by physical cables and by software. If one of the cluster nodes fails, another node begins to provide service (a process known as failover).
Volume Shadow Copy Service (VSS)
Hyper-V uses the Volume Shadow Copy Service (VSS) to backup and restore virtual machines (VMs).
If the backup (volume snapshot) integration services are installed in the guest operating system, a VSS requester is installed that will allow VSS writers in the guest operating system to participate in the backup of the VM.
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Posted in Hyper-V, MCTS, Microsoft, Server Virtualization (70-659), Training, Virtualisation
Tagged backup, backup and restore, Hyper-V, Microsoft, restore, storage, VSS
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VM — Backup & Restore: Overview
Managing VM Backup and Restore — Overview
- VMs contain a single file (VHD) for the OS
- Easier to backup
- Cannot restore individual files
- Consider Online backups
- Install Integration Services (and backup integration service)
- Must use NTFS
- Enable VSS on all volumes that the VM uses
- Host backups
- Backup/restore all except virtual networks
- Including VM config, snapshots, VHDs
- Guest backups
- Granular file/application level backup
- Use before, and in addition to full (host ) backup
Posted in Hyper-V, MCTS, Microsoft, SCVMM, Server Virtualization (70-659), Virtualisation
Tagged backup, backup and restore, restore, vhd, virtual hard disks, virtual machine, vm
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Exam 70–659 Revision Notes — Module 3
Time for a review of Module 3 — Managing and Monitoring Virtual Environments
This module mainly concentrates on System Center Virtual Machine Manager (SCVMM) and its features.
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Tagged 70-659, Hyper-V, Microsoft, revision notes, scvmm, virtual machine, virtual machine manager, vm, VMM
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VMM — VM Templates
A virtual machine template is a library resource that consists of a hardware profile, a virtual hard disk, and an optional guest operating system profile.
Templates provide a standardised group of hardware and software settings that you can use to create multiple new virtual machines configured with those settings.
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Tagged scvmm, templates, virtual machine, vm, VMM
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VMM Library
The Virtual Machine Manager library is a catalog of resources that allows users to store objects that are not running or associated with a host.
The library contains files stored on library shares, as well as templates, operating system profiles, and hardware profiles stored in the Virtual Machine Manager database.
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VMM Self-Service Portal
SCVMM includes an optional component called the “VMM Self Service Portal” that allows you to manage and access virtual machines using a web interface.
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Authorization Manager (AzMan)
Hyper-V security is based on Authorization Manager API (known as AZMan).
AzMan allows Role Based Access Control (RBAC) and the delegation of access to Hyper-V. As well as delegating access, AzMan also enables auditing for any actions performed.
Posted in Hyper-V, MCTS, Microsoft, SCVMM, Server Virtualization (70-659), Training, Virtualisation
Tagged audting, Authorization Manager, AzMan, RBAC, Role Based Access Control
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