Veritas NetBackup 8.1 for Hyper-V 管理指南

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"VERITAS NetBackup 8.1 Hyper-V Administrator's Guide" VERITAS NetBackup 8.1是一款专为Hyper-V虚拟化环境设计的数据保护解决方案。本指南是针对Hyper-V管理员的详细操作手册，旨在帮助用户充分利用NetBackup的功能来保护、管理和恢复Hyper-V虚拟机。 NetBackup 8.1的核心功能包括： 1. **全面的数据保护**：NetBackup支持对Hyper-V主机上的虚拟机进行定期备份，确保在数据丢失或系统故障时能够快速恢复。 2. **即时恢复**：通过提供虚拟机级别的恢复，NetBackup允许管理员直接从备份中快速恢复单个文件、卷或整个虚拟机，减少业务中断时间。 3. **政策管理**：利用NetBackup的策略管理功能，管理员可以创建和应用灵活的备份策略，根据业务需求设置不同的备份频率、保留期和优先级。 4. **自动发现与保护**：NetBackup可以自动识别并添加新的Hyper-V主机和虚拟机到保护范围，简化管理流程。 5. **优化的备份性能**：通过利用Hyper-V的VSS（Volume Shadow Copy Service）和Snapshots技术，NetBackup能实现高效无中断的备份，同时降低对生产环境的影响。 6. **云集成**：NetBackup 8.1可能还支持将Hyper-V虚拟机的备份直接存储到云端，如Amazon S3或Azure Blob Storage，实现混合云备份策略。 7. **资源优化**：通过智能调度和带宽控制，NetBackup可以在不影响关键业务的情况下最大化备份操作的效率。 8. **灾难恢复**：提供全面的灾难恢复解决方案，包括异地复制和测试恢复，确保在灾难发生时能够快速恢复业务连续性。此外，文档中强调了版权信息，Veritas Technologies LLC拥有NetBackup及相关商标的所有权，同时产品可能包含第三方软件，这些软件遵循开源或免费软件许可证。用户应参考产品附带的第三方法律通知文档或访问Veritas官网获取详细信息。请注意，使用NetBackup 8.1需要遵守产品许可协议，该协议可能限制其使用、复制、分发和反编译/逆向工程的行为。用户在使用前应仔细阅读并理解这些条款，以避免任何潜在的法律问题。总结来说，VERITAS NetBackup 8.1是Hyper-V环境中的一款强大工具，它提供了全面的数据保护方案，包括高效备份、即时恢复、策略管理等功能，并具有云集成和灾难恢复能力。管理员应熟悉其功能和操作流程，以确保企业的数据安全和业务连续性。

NetBackup Machines and Policy Type. Add the master server to the Server

to use for backups and restores list.

■ Read the notes on NetBackup for Hyper-V.

See “NetBackup for Hyper-V notes and restrictions” on page 18.

See “Notes on full virtual machine restore” on page 111.

See “Notes on individual file restore” on page 109.

■ Read the best practices.

See “Best practices” on page 146.

■ Create a NetBackup policy for Hyper-V.

See “Creating a Hyper-V policy from the NetBackup Policies utility” on page 34.

See “Creating a Hyper-V policy for automatic virtual machine selection”

on page 64.

■ Run a Hyper-V backup.

See “Backing up Hyper-V virtual machines” on page 107.

■ Perform a restore.

See “About restoring individual files” on page 113.

See “Restoring the full Hyper-V virtual machine” on page 121.

■ To troubleshoot your configuration:

See the Troubleshooting chapter.

Quick reference for troubleshooting

Consult the following topics for troubleshooting tips and pointers:

■ See “NetBackup status codes related to Hyper-V” on page 155.

■ See “NetBackup logs for Hyper-V and how to create them” on page 149.

16Introduction

Quick reference for troubleshooting

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).

18Notes 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

19Notes and prerequisites

NetBackup for Hyper-V notes and restrictions

the same disk UUID, NetBackup performs a full backup of those disks. It does

not perform an incremental backup of them. The disks that have unique IDs

undergo an incremental backup, as expected. In the Activity Monitor, the job

details include messages such as the following:

The virtual machine (Name: testVM, GUID: 98321741-A936-4128-8AB0-07099B23E25C) uses

multiple disks with the same disk Id.

Disk Id: 7198C033-AB5D-4585-905D-0DA68D26F9C5 Disk path: E:\VMs\testVM\testVM1.vhdx

Disk Id: 7198C033-AB5D-4585-905D-0DA68D26F9C5 Disk path: E:\VMs\testVM\testVM2.vhdx

You may lose optimization during the backups for the above listed disks.

To perform incremental backup of these virtual disks, assign a unique ID to each

disk. For example, you can use the Set-VHD PowerShell cmdlet to reset the

disk ID for testVM1 as follows:

Set-VHD -Path E:\VMs\testVM\testVM1.vhdx –ResetDiskIdentifier

In the case of the differencing disks, you must run additional commands to

re-create the disk chain. For more details on the Set-VHD cmdlet, see the

following Microsoft TechNet article:

https://technet.microsoft.com/en-us/library/hh848561.aspx

■ Additional notes are available on Accelerator:

See “Accelerator notes and requirements for virtual machines” on page 134.

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

support backup of encrypted vhd or vhdx files.

■ The following is due to a Microsoft limitation; this note applies to the VSS backup

method only. For the virtual machines that have a FAT or FAT32 file system,

NetBackup supports only Hyper-V offline backup.

See “About Hyper-V online and offline backups for VSS” on page 173.

■ The WMI backup method (for Hyper-V Server 2016 and later) does not employ

online vs offline backups.

See “WMI backup method: State of the virtual machine before and after restore”

on page 109.

■ For the VSS backup method: If a virtual machine is in the Paused state when

the backup starts, the virtual machine is placed in the Saved state after the

backup completes.

■ The WMI backup method supports a new Hyper-V policy option: Consistency

level (on the policy's Hyper-V tab under Advanced). The available settings are

Application Consistent Then Crash Consistent, Application Consistent,

and Crash Consistent.

For the WMI backup method, note the following:

20Notes and prerequisites

NetBackup for Hyper-V notes and restrictions

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