Veritas NetBackup 8.1 Disk Guide: OpenStorage Solutions for UNIX, Windows & Linux

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Veritas NetBackup 8.1 是一款专注于OpenStorage Solutions的备份解决方案，适用于多种操作系统环境，包括UNIX、Windows和Linux。该文档是一份详细的指南，主要针对磁盘备份策略和管理，旨在帮助用户在这些平台上优化和实施NetBackup功能。该版本更新日期为2017年8月28日，强调了版权归属，指出所有内容受Veritas Technologies LLC及其关联公司的商标保护。作为Veritas的旗舰产品之一，NetBackup 8.1 提供了高级备份功能，包括数据保护、灾难恢复以及性能优化。它支持对硬盘进行有效管理，确保数据的完整性和一致性。该文档特别关注了以下几点： 1. **兼容性**：指南涵盖了多个操作系统平台，这意味着用户可以根据其环境选择合适的备份策略，实现跨平台的统一管理。 2. **许可证与合规性**：文档提到了产品包含第三方软件，Veritas必须遵守相关法律，提供对这些第三方程序的适当授权。这可能涉及到开源或免费软件许可证，用户在使用时需要参考附带的许可证协议，或者访问Veritas官方网站获取更多信息。 3. **限制与义务**：用户在使用产品时受到特定的使用、复制、分发和解构的限制，这些限制根据所附的软件许可协议执行。 4. **技术细节**：指南可能详细阐述了如何配置磁盘备份策略，包括增量备份、差异备份和全量备份的选项，以及如何设置备份计划和恢复策略，确保数据安全和高效恢复。 5. **性能优化**：针对不同规模和需求的环境，指南可能提供了性能调优技巧，如存储效率、备份速度提升以及资源管理的最佳实践。 6. **维护与支持**：还包括了关于如何监控和维护NetBackup运行状态，以及处理可能遇到的问题和故障排查的指导。 7. **安全**：由于涉及数据保护，文档很可能包含了如何保障数据隐私和网络安全，以及如何遵循最新的备份和安全标准。 8. **升级与迁移**：对于正在使用旧版本或想要从其他备份解决方案切换到NetBackup 8.1的用户，可能会有关于迁移过程和兼容性的建议。这份指南是Veritas NetBackup 8.1磁盘管理的实用手册，无论是初次采用还是经验丰富的用户，都能从中找到适合他们的操作指南和最佳实践。通过阅读和遵循其中的指导，组织可以更好地利用这款强大的数据保护工具，确保业务连续性和数据安全性。

About spanning volumes in OpenStorage disk pools

One of the capabilities a vendor may expose is the potential for images to span

across volumes within a disk pool. NetBackup uses that capability to use the disk

storage most effectively. NetBackup breaks up backup images into fragments and

stores a fragment or fragments if a full image does not fit into the space available.

In NetBackup, the SpanImages attribute specifies that backup images can span

across volumes in a disk pool. The SpanImages attribute applies to both storage

servers and disk pools.

Volume spanning is not a trait that the OpenStorage vendor plug-in exposes.

Therefore, by default NetBackup does not include the SpanImages attribute on

storage servers and disk pools. You must set the SpanImages attribute on the

storage server and the disk pools so that backup images span volumes.

See “Setting OpenStorage storage server attributes” on page 92.

See “Setting OpenStorage disk pool attributes” on page 106.

NetBackup does not support disk volume spanning for replication. NetBackup fails

backup jobs to the disk pools that span volumes if the backup job is in a storage

lifecycle policy that also contains a replication operation.

About OpenStorage optimized duplication and

replication

If an OpenStorage disk appliance can copy the data on one appliance to another

appliance of the same type, NetBackup can use that capability. The following table

lists the duplication methods in NetBackup that can use the functionality:

Table 2-2

NetBackup OpenStorage duplication and replication methods

DescriptionMethod

See “About OpenStorage optimized

duplication within the same domain”

on page 63.

Dupliation within the same NetBackup domain

See “About NetBackup Auto Image

Replication” on page 69.

Replication to a remote NetBackup domain

About OpenStorage optimized synthetic backups

One of the capabilities a vendor may expose is the disk appliance's potential to

construct synthetic backup images. A media server uses messages to instruct the

16Planning your deployment

About OpenStorage optimized duplication and replication

storage server which full and incremental backup images to use to create the

synthetic backup. The storage server constructs (or synthesizes) the backup image

directly on the disk storage. The backups that NetBackup creates in this way are

known as optimized synthetic backups.

The OpenStorage optimized synthetic backup method provides the following benefits:

■ Faster than a synthetic backup.

Regular synthetic backups are constructed on the media server. They are moved

across the network from the storage server to the media server and synthesized

into one image. The synthetic image is then moved back to the storage server.

■ Requires no data movement across the network.

Regular synthetic backups use network traffic.

■ Uses fewer disk resources, depending on the vendor implementation.

The storage vendor determines the storage implementation. If the disk appliance

uses data deduplication, duplicate data is not created and stored.

In NetBackup, the Optimizedlmage attribute enables optimized synthetic backup.

It applies to both storage servers and disk pools.

If the original vendor plug-in exposed optimized synthetic backup functionality, the

storage server and disk pools inherited that functionality. However, if your

OpenStorage vendor updates their plug-in to add optimized synthetic backup

functionality, you have to update NetBackup.

See “Adding OpenStorage functionality to an existing environment” on page 89.

The following table describes the requirements and limitations for OpenStorage

optimized synthetic backups.

Table 2-3

OpenStorage optimized synthetic backups requirements and

limitations

DescriptionWhat

The following are the requirements for optimized synthetic backups:

■ Optimized synthetic backups are licensed on the NetBackup master

server.

■ The plug-in from the disk appliance vendor supports the

OpenStorage OptimizedImage attribute.

■ The vendor plug-in is installed on each media server that connects

to the storage appliance.

■ The target storage unit's disk pool is the same disk pool on which

the source images reside.

Requirements

NetBackup does not support storage unit groups as a destination for

optimized synthetic backups.

Limitations

17Planning your deployment

About OpenStorage optimized synthetic backups

About storage unit groups for OpenStorage

You can use a storage unit group as a backup destination for OpenStorage storage.

A storage unit group must contain only the storage units that have the same type

of OpenStorage appliance as the storage destination.

Storage unit groups avoid a single point of failure that can interrupt backup service.

The best storage savings occur when a backup policy stores its data in the same

deduplication destination disk pool instead of across multiple disk pools. For this

reason, the Failover method for the Storage unit selection uses the least amount

of storage. All of the other methods are designed to use different storage every

time the backup runs. Veritas recommends that you select the Failover method for

the Storage unit selection type.

Table 2-4

Requirements and limitations for storage unit groups

DescriptionWhat

A group must contain storage units of one storage destination type only.Requirements

NetBackup does not support the following for storage unit groups:

■ Optimized duplication of deduplicated data. If you use a storage unit

group as a destination for optimized duplication of deduplicated

data, NetBackup uses regular duplication.

See “About OpenStorage optimized duplication within the same

domain” on page 63.

■ Optimized synthetic backups. If NetBackup cannot produce the

optimized synthetic backup, NetBackup creates the more

data-movement intensive synthetic backup.

See “About OpenStorage optimized synthetic backups” on page 16.

Limitations

About OpenStorage direct to tape

OpenStorage direct to tape lets you copy NetBackup backup images directly from

a disk appliance to tape. The copy operation does not use NetBackup media server

I/O.

NetBackup manages the copied images based on retention periods you define.

Direct to tape uses the Network Data Management Protocol (NDMP) for the copy

operations. Direct to tape requires specific NDMP features and release levels.

See “About NDMP requirements for OpenStorage direct to tape” on page 19.

NetBackup media servers manage the operations. The media servers require the

NetBackup for NDMP software and specific NetBackup release levels.

18Planning your deployment

About storage unit groups for OpenStorage

See “About media server recommendations for OpenStorage direct to tape”

on page 22.

How to configure OpenStorage direct to tape is described elsewhere.

See “Configuring OpenStorage direct to tape” on page 60.

About NDMP requirements for OpenStorage direct to tape

If the NDMP requirements are not met, the images are still duplicated. However,

the copy operation uses the traditional duplication method of reading the image

through the NetBackup media server and writing out to tape.

Table 2-5

NDMP requirements for OpenStorage direct to tape

DescriptionNDMP functionality

The OpenStorage disk appliance requires an NDMP server that supports the OpenStorage

direct to tape specification. The Veritas OpenStorage Partner Program publishes the

specification. The direct to tape feature uses a subset of the NDMP File Service Extension

(FSE) commands.

The host that provides the NDMP FSE functionality can be one of the following entities:

■ The disk appliance storage server.

See “About OpenStorage storage servers for backups” on page 12.

■ An alternative name (that is, interface) for the storage server.

■ A separate host that interacts with the disk appliance. The host must be directly connected

to the disk appliance.

NDMP File Service

Extension

Direct to tape requires an NDMP tape server for the destination tape library. The NDMP tape

server must support NDMP v4 or later.

The host that provides the NDMP tape server functionality can be one of the following entities:

■ The same host that provides the NDMP FSE functionality.

If one host provides the NDMP FSE and NDMP tape server functionality, the tape library

must be attached directly to that host. Data does not travel over the network.

See Figure 2-2 on page 20.

■ A host that is embedded in the tape library. Data travels over the network.

See Figure 2-3 on page 20.

■ A separate host to which the tape server is directly attached. Data travels over the network.

See Figure 2-4 on page 21.

NDMP tape server

19Planning your deployment

About OpenStorage direct to tape

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