Veritas NetBackup 8.0 OpenStorage Solutions Guide for Disk

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"Veritas NetBackup 8.0 OpenStorage Solutions Guide for Disk，涵盖了UNIX, Windows, Linux平台，提供了关于Veritas NetBackup在使用开放存储解决方案时与磁盘相关的详细指导。文档包含了法律通知，版权信息以及第三方软件的授权情况。" Veritas NetBackup是一款业界知名的备份和恢复解决方案，其8.0版本在数据保护方面提供了更高级的功能和优化。OpenStorage Solutions是NetBackup的一个关键特性，它允许用户利用各种硬件和软件存储设备，包括磁盘，来实现高效、灵活的数据备份。在"OpenStorage Solutions Guide for Disk"中，用户可以了解到如何配置和管理NetBackup与不同操作系统（如UNIX, Windows和Linux）下的磁盘存储。这包括了设置存储目标、策略优化、性能监控以及故障排除等步骤。此指南可能会详细阐述如何集成和配置OpenStorage技术，例如通过NetBackup API和插件来与第三方存储硬件或软件进行交互，以实现自动化和定制化的备份流程。文档的"Legal Notice"部分强调了版权信息，指出Veritas Technologies LLC是NetBackup商标的所有者，并提醒用户注意其他可能存在的第三方商标。此外，Veritas可能会在产品中包含第三方软件，这些软件可能根据开源或免费软件许可证提供，用户需遵守相应的许可条款。关于第三方软件，Veritas有义务提供适当的归属，并提供了链接到详细的第三方法律通知文档，用户可以在这些通知中找到有关开源和免费软件的具体授权信息。这表明Veritas尊重并遵守开源社区的规定，同时也确保用户了解他们可能享有的权利和应履行的义务。最后，文档提及产品的使用、复制、分发和反编译/逆向工程都受到特定许可条款的限制。这意味着用户在使用NetBackup 8.0时必须遵循这些条款，以确保合规性。 "NetBackup 8.0 OpenStorage Solutions Guide for Disk"是一个针对IT专业人员的实用资源，帮助他们在多平台环境中充分利用NetBackup的开放存储功能，同时遵守相关的法律和许可规定。

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 91.

See “Setting OpenStorage disk pool attributes” on page 105.

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 68.

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 88.

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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