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NetVault Plug-in for Hyper-V 11.1 - User's Guide

Backing up data: an overview

Plug‑in for Hyper‑V supports image-level backups and restores. An image-level backup includes all disk and configuration files associated with a given VM, enabling restoration of the entire VM. You can use this type of backup if hardware fails or VM disk files are deleted. Using the file-level indexing feature, you can also back up images with file-level indexing enabled and later perform file-level restores. As described in the next topic, there are network-connectivity issues with non-VSS-compliant VMs.

Performing backups

The procedure for performing image-level backups, with or without indexing, includes the steps outlined in the following topics.

Selecting data for a backup

You must use sets — Backup Selection Set, Backup Options Set, Schedule Set, Target Set, and Advanced Options Set — to create a backup job.

TIP: To use an existing set, click Create Backup Job, and select the set from the Selections list.
1
You can also start the wizard from the Guided Configuration link. In the Navigation pane, click Guided Configuration. On the NetVault Configuration Wizard page, click Create backup jobs.
2
In Job Name, specify a name for the job.
3
Next to the Selections list, click Create New.
4
In the list of plug-ins on the NetVault Backup Selections page, open Hyper-V Plugin, and expand the localhost or <clusterName> node to display the list of VMs.
5
Select the localhost or <clusterName> node to include every VM that exists at the time of backup, or select individual VMs to back up a specific set of VMs.
6
Click Save to save the set, enter a name in the Create New Set dialog box, and click Save.

Setting backup options

The next step involves creating the Backup Options Set or selecting an existing one. There are three options available: Maximum Number of Parallel Streams, Enable indexing for File Level Recovery, and Enable Active Block Mapping.

The default for Maximum Number of Parallel Streams is 4 for Windows Server 2012 and 2012 R2 and 1 for Windows Server 2008 R2. If your environment uses Windows Server 2012 or 2012 R2, you can increase the setting up to 32.
The Enable indexing for File Level Recovery option is disabled by default. Indexing lets you restore individual files and directories from image-level backups of VMs.
Windows: NTFS
The Enable Active Block Mapping option is enabled by default. To reduce network and storage requirements, ABM technology provides filters to remove zeroed blocks during backups. Removing these blocks reduces the backup size and the amount of data transferred over the network. If you disable ABM, the plug-in automatically uses zero-block exclusion to ensure the zeroed blocks are excluded during backups.
Windows: NTFS
TIP: To use an existing set, in the Plugin Options list, select the set that you want to use.
1
Next to the Plugin Options list, click Create New.
2
In the Maximum Number of Parallel Streams box, enter the applicable number.
3
If you might want to perform restores at the file level, select the Enable indexing for File Level Recovery option.
4
5
Click Save, specify a name for the set in the Create New Set dialog box, and click Save.
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