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  1. Home
  3. Veritas NetBackup™ for Hyper-V Administrator's Guide
  5. Configure NetBackup policies for Hyper-V
  7. Backup options on the Hyper-V tab
  9. Optimization options (Hyper-V)
Veritas NetBackup™ for Hyper-V Administrator's Guide

Optimization options (Hyper-V)

Table: Optimizations for Hyper-V

Option

Backup method

Description

Enable file recovery from VM backup

VSS, WMI

This option allows the restore of individual guest OS files from the backup, such as text files and other documents.

Note:

With or without this option, you can restore the entire virtual machine.

Enable block-level incremental backup

WMI

For block-level backups of the virtual machine. Uses Microsoft's resilient change tracking (RCT) to perform faster backup of virtual machines.

This option also reduces the size of the backup image.

Note:

When you select this option, Perform block level incremental backups (on the Attributes tab) is automatically selected by default and grayed out.

Use Accelerator

WMI

NetBackup Accelerator uses Microsoft's resilient change tracking (RCT) to perform faster backups (full and incremental backups).

Exclude deleted blocks

WMI

Reduces the size of the backup image by excluding any unused or deleted blocks within the file system on the virtual machine. This option uses proprietary mapping technology to identify vacant sectors (allocated but empty) within the file system.

This option supports the following file systems: Windows NTFS, and Linux ext2, ext3, and ext4. It also supports the Windows Logical Disk Manager (LDM) and the Linux Logical Volume Manager (LVM2).

Exclude swap and paging files

WMI

Reduces the size of the backup image by excluding the data in the guest OS system paging file (Windows) or the swap file (Linux).

Note:

This option does not exclude the swapping and paging files from the backup: it only excludes the data in those files. If the files are restored, they are restored as empty files.

Note:

For a Linux virtual machine, this option disables the swap file when you restore the virtual machine. You must reconfigure the swap file after the virtual machine is restored. To allow the virtual machine to be restored with its swap file enabled, do not select Exclude swap and paging files.

See NetBackup character restrictions for vhd or vhdx names and the VM path when the Enable file recovery from VM backup option is used.

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