Veritas NetBackup 8.0 for Hyper-V 管理指南

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"VERITAS NetBackup 8.0 Hyper-V Administrator's Guide" VERITAS NetBackup 8.0是一款针对Microsoft Hyper-V虚拟化环境的专业备份解决方案，旨在为用户提供高效、可靠的虚拟机备份与恢复功能。该指南是针对Hyper-V管理员的详细操作手册，涵盖了从安装、配置到日常管理的所有关键步骤。一、NetBackup 8.0概述 NetBackup 8.0是VERITAS公司的一款旗舰级数据保护产品，它提供了全面的数据保护方案，包括对物理服务器、虚拟环境（如Hyper-V）、云存储和各种应用程序的数据备份与恢复。此版本增强了性能、可扩展性和灵活性，以适应不断变化的IT需求。二、Hyper-V备份支持在Hyper-V环境中，NetBackup 8.0能够直接备份和恢复虚拟机，无需在每个虚拟机上安装代理。它支持包括虚拟机的完整备份、增量备份、差异备份等多种备份类型，以及细粒度的文件和应用恢复。此外，它还提供了对Hyper-V快照的集成，以减少备份窗口并降低对生产环境的影响。三、配置与管理管理员可以通过NetBackup的中央管理控制台进行策略配置，设置备份计划、资源分配、备份保留策略等。通过智能调度和负载均衡，NetBackup可以优化备份作业的执行，确保备份任务在不影响业务运行的前提下顺利完成。四、灾难恢复与业务连续性 NetBackup 8.0提供了一套完整的灾难恢复解决方案，包括即时恢复功能，使得在数据丢失或系统故障后能快速恢复服务。此外，它还支持复制到远程站点，实现跨站点的数据保护，提高业务连续性。五、许可证与开源软件产品可能包含第三方软件，这些软件可能根据开源或免费软件许可条款提供。Veritas要求为这些第三方程序提供适当的归属。用户在使用过程中，应遵循随产品提供的许可证协议，这不会改变用户在开源或免费软件许可证下的权利和义务。六、法律条款与限制 NetBackup 8.0的使用受到限制，包括但不限于复制、分发和反编译。文档内容不得被部分或全部复制，除非得到Veritas的明确授权。 VERITAS NetBackup 8.0为Hyper-V环境提供了强大且全面的数据保护能力，通过自动化和智能化的管理工具，帮助管理员轻松应对数据备份和恢复的挑战，确保企业的数据安全和业务连续性。

Table 1-4

VSS backup method: Phases of NetBackup for Hyper-V backup

(continued)

DescriptionPhase

On Windows 2012 hosts and earlier: If the virtual machine was placed in the Saved state, Hyper-V returns

the virtual machine to its original state.

Phase 4

The NetBackup client on the Hyper-V host reads the data from the snapshot of the virtual machine and

transfers the data to the media server. The media server writes the data to the NetBackup storage unit.

Phase 5

The NetBackup client on the Hyper-V host deletes the host volume snapshot.Phase 6

Table 1-5

WMI backup method: Phases of NetBackup for Hyper-V backup

DescriptionPhase

The NetBackup master server initiates the backup.Phase 1

The NetBackup client on the Hyper-V host initiates a virtual machine snapshot (checkpoint).Phase 2

On Windows 2016 hosts or later, the NetBackup client on the Hyper-V host creates a virtual machine

snapshot (checkpoint).

■ If the Hyper-V policy Consistency level option is set to Application Consistent or Application

Consistent Then Crash Consistent: The VSS integration services component inside the guest OS

attempts to quiesce the virtual machine.

■ If the Hyper-V policy Consistency level option is set to Crash Consistent: The virtual machine is

not quiesced.

If the backup uses block-level incremental backup (BLIB), the snapshot is converted to a reference point.

Resilient change tracking (RCT) is used to perform faster backup of the virtual machines by moving only

the blocks that have changed between backups.

As a result of the virtual machine snapshot (checkpoint), the .avhd or .avhdx files are created for the

virtual machine. All subsequent writes from the virtual machine go to these files.

Note: The Consistency level option is set on the policy's Hyper-V tab, under Advanced....

Phase 3

The NetBackup client reads the data directly from the virtual machine files on the Hyper-V host and

transfers the data to the media server. The media server writes the data to the storage unit.

Phase 4

The NetBackup client on the Hyper-V host deletes the virtual machine snapshot (checkpoint). As a result,

the.avhd or .avhdx files that were created during the backup are merged back into the original virtual

machine disks.

Phase 5

NetBackup administrator tasks for Hyper-V

The following are the tasks for the NetBackup administrator:

16Introduction

NetBackup administrator tasks for Hyper-V

An update for the VSS hardware provider snapshot for Hyper-V, to avoid a

Hyper-V writer crash during backup.

■ Check with Microsoft to see if additional hotfixes have been released:

http://technet.microsoft.com/en-us/library/dd430893.aspx

■ Before starting a backup of a virtual machine, verify that the NetBackup master

server and media server can communicate with the Hyper-V server. Add the

name of the NetBackup master server to the server list on the NetBackup client

and (optional) alternate client.

■ On a virtual machine, Windows shadow storage for a volume (such as C:) does

not have to be configured on the same volume. For instance, shadow storage

for the C:\ volume can be configured on D:\. If the Hyper-V server is Windows

2008 R1 and shadow storage for a volume is not configured on the same volume,

note: Windows hotfix KB959962 must be installed to perform an online backup

of the virtual machine. In this case, if the Hyper-V server is 2008 R1 and the

hotfix has not been applied, the backup is performed offline.

Windows 2008 R2 contains all required hotfixes.

Windows shadow storage is required whenever the Windows Volume Shadow

Copy Service (VSS) creates point-in-time snapshots.

NetBackup for Hyper-V notes and restrictions

The following notes and restrictions apply to NetBackup for Hyper-V:

■ For VSS with disk arrays:

To use a hardware array snapshot, make sure that the hardware array's VSS

provider supports the snapshots that involve the Hyper-V writer. Consult the

release notes of the array vendor or VSS provider.

■ NetBackup for Hyper-V does not support the NetBackup Instant Recovery

feature.

■ The following is due to a Microsoft limitation: NetBackup for Hyper-V does not

support VSS or WMI backup or restore of the vhdx files that are shared among

multiple VMs.

■ To perform Hyper-V backups with the SAN Client feature, install SAN Client on

the Hyper-V server. Do not install SAN Client on the virtual machines. For more

information on SAN Client with Hyper-V, see the NetBackup SAN Client and

Fibre Transport Guide.

Note: The SAN Client feature for Hyper-V is only supported for the VSS backup

method (not for WMI).

19Notes and prerequisites

NetBackup for Hyper-V notes and restrictions

■ The following is due to a Microsoft limitation: If the VM's virtual disk files reside

in a volume or folder that is compressed, NetBackup cannot use the WMI backup

method to create a snapshot of the VM. The snapshot job fails with status 156,

“snapshot error encountered.”

As a workaround, remove compression from the volume or folder where the

virtual disk resides and rerun the backup.

■ NetBackup for Hyper-V supports Windows NTFS file encryption and compression,

for backup and restore. However, it does not support NetBackup’s compression

or encryption options (in the NetBackup policy attributes).

For UNIX or Linux guest operating systems: NetBackup for Hyper-V does not

support any type of compression or encryption, whether they are set in

NetBackup or in the guest OS.

Note: The compressed Windows NTFS files are backed up and restored as

compressed files.

■ If a policy is changed from manual selection to Intelligent policy (or vice versa),

note: The next backup of the VM is a regular full backup, even if a backup already

exists for that VM.

For example:

■ In a new Hyper-V policy, the Select manually option on the Clients tab is

used to select a VM. The first backup from the policy runs.

■ In the policy, an Intelligent Policy query is used to select the same VM, and

the VM is backed up a second time. Because of the switch from manual

selection to query-based selection, this second backup is a regular full

backup. Note that for a policy that uses Enable block-level incremental

backup (BLIB) or BLIB plus Accelerator, the backup processing is not limited

to changed blocks only.

For the second backup, the Detailed status log includes a message similar

to the following:

Sep 29, 2016 11:16:53 AM - Info bpbrm (pid=13680) There is no

complete backup image match with track journal, a regular full

backup will be performed.

The same backup behavior occurs if the policy’s VM selection is switched

from query-based to manual selection: The second backup is a regular full

backup.

■ For the WMI backup method with the Enable block-level incremental backup

option (with or without Accelerator): If the VM has multiple virtual disks that have

20Notes and prerequisites

NetBackup for Hyper-V notes and restrictions

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