Veritas NetBackup Appliance 容量规划与性能调优指南

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"Veritas NetBackup Appliance Capacity Planning and Performance Tuning Guide 5.0" 本文档是Veritas NetBackup设备的容量规划和性能调优指南，主要针对Veritas NetBackup Appliance 5.0版本。它提供了关于如何有效地管理和优化备份硬件资源，以确保系统在处理大量数据备份和恢复任务时保持高效运行的详细指导。一、容量规划容量规划是成功部署和管理NetBackup Appliance的关键步骤。这个过程涉及以下方面： 1. **需求分析**：确定当前和未来的备份工作负载，包括备份频率、数据量、备份窗口以及恢复点目标（RPO）和恢复时间目标（RTO）。 2. **硬件配置**：根据需求选择合适的NetBackup Appliance型号，考虑存储容量、处理器性能、内存大小以及网络带宽。 3. **增长预测**：定期评估并预测数据增长，以确保设备有充足的容量应对未来的需求。 4. **冗余和容错**：规划适当的冗余策略，如RAID配置和磁盘镜像，以减少数据丢失的风险。二、性能调优性能调优旨在最大化Appliance的运行效率，减少备份和恢复的时间，提高整体系统性能： 1. **监控和分析**：使用内置的监控工具跟踪Appliance的CPU、内存、磁盘I/O和网络使用情况，找出瓶颈。 2. **策略优化**：调整备份策略，例如，利用增量和差异备份减少全量备份的频率，或者通过并行备份增加吞吐量。 3. **资源分配**：根据工作负载特性，合理分配CPU、内存和存储资源，确保关键任务优先。 4. **网络优化**：检查网络设置，如TCP/IP参数和QoS策略，确保数据传输效率。三、第三方软件和开源许可 Veritas NetBackup Appliance可能包含第三方软件，这些软件遵循特定的开源或免费软件许可。用户需要了解这些许可条款，以确保合规使用。四、法律通知文档中包含了Veritas Technologies LLC的版权信息和其他可能的商标声明。同时，还提到了第三方软件的许可协议，用户应遵守这些协议，特别是在涉及到开源或免费软件时。五、更新和维护文档最后更新日期为2022年4月25日，这表明Veritas会持续更新和改进其Appliance的性能和功能，用户应关注最新的更新和维护信息，以获取最佳的使用体验。 Veritas NetBackup Appliance的容量规划和性能调优是一个综合性的过程，需要结合实际工作负载、硬件配置、监控工具和策略优化等多个方面进行考虑和操作。正确执行这些步骤将有助于提升备份系统的稳定性和效率。

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Table 2-1

Systems to be backed up (continued)

Considerations to be madeSystem

Identify and record the following information, for each database or application

server:

■ Host name

■ Location

■ Operating system and its version

■ Server type and application release numbers

■ Network technology - 10 GB Ethernet, 1 GB Ethernet, or SAN Clients

■ Database types, database engines, and their version numbers

■ Method used to backup these databases

■ Whether the databases or application server can be backed up while they

are online or offline

To backup an online database, you need a NetBackup database agent

specific to the database engine. Recording this information can help you to

identify the various database agents you may require based on your backup

requirements. For the compatibility list of all NetBackup database agents,

see http://www.veritas.com/docs/000006088.

■ Whether you want to backup the entire database or the raw partitions.

If you decide to take databases backups using raw partitions by Snapshot

Client backup, this may result in a backup size equal to the total size of your

raw partition. Identifying this information can help you decide how you would

like to backup your databases

Note: You can use the templates provided in the Template to record database

information to gather backup requirements for your organization.

Databases and Application servers

Identify the following information, about the virtualized infrastructure:

■ Hosts within these virtualized datacenters

■ Operating systems and their versions

■ Type of data stored

■ Type of Hypervisor used

■ Network technology used - 10 GB Ethernet, 1 GB Ethernet, or VADP over

SAN

■ Type of backup performed on these virtualized datacenters- incremental,

full

Virtualized datacenters

See “Analyzing your backup requirements” on page 14.

See “How much data do you want to back up?” on page 17.

See “When should the backup take place?” on page 18.

See “What is the retention period?” on page 20.

16Analyzing your backup requirements

Analyzing your backup requirements

How much data do you want to back up?

When calculating the total amount of data to be backed up consider the current

requirements and the expected growth in the data in the near future. Table 2-2 lists

the considerations to be made for calculating the amount of data to be backed up.

Table 2-2

Calculating the amount of data to be backed up

Additional commentsChecks to calculate the amount of

data to be backed up

■ Calculate the total disk space for each individual system, along with

the space used for databases.

■ Identify the total number of files to be backed up on each system.

■ Calculate the amount of disk space used by a computer system on

their disk drives, shared drives, and so on.

■ You can use the calculated total size to analyze the potential growth

of your system to ensure that your current backup solution

accommodates the growth in backup requirements

■ Perform thorough analysis of the data being protected for at-least

30 days to get an understanding of data types, growth trends and

change rates using the NetBackup Deployment Utility.

Have you computed the total disk space on

each individual system?

Ensure that you have identified and listed all the data types to be

included in the backup. For example, does the data contain text,

graphics, databases, and so on. Each data type contributes to a specific

amount of data in your total backup requirement.

Some of the advantage of identifying the data types to be backed up

are listed below:

■ Based on this classification you can identify the amount of data

collected under each type, this calculated amount can help you

compute the expected growth in data in the near future.

■ The other advantage of identifying data types can help you decide

upon the relevance and priority of backing up a particular data type.

Have you identified and added all the data

types included in the backup?

Identify how much amount of data from your total capacity is

compressible or not. Based on this information you can ascertain the

amount of space to be allocated to backup data that is compressible

and to data that is incompressible.

How compressible is the data?

Identify if you want to encrypt the data during backup. Based on the

level of security applicable to the data being backed up this decision

can be taken.

Note: You will also need to consider the additional time encrypted

backups may take. Based on which your backup schedules will get

affected.

Will the data be encrypted?

17Analyzing your backup requirements

Analyzing your backup requirements

Table 2-2

Calculating the amount of data to be backed up (continued)

Additional commentsChecks to calculate the amount of

data to be backed up

Ensure that you consider the amount of data stored on these repositories

only once, if you use storage replication or disk mirroring techniques.

Have you added the space on mirrored disks

only once?

Ensure that you add the amount of data stored on all the database

management systems maintained in your organization.

Have you added the size of your database

backups to your final calculations?

Understand the data protection requirement for the data to be backed

up, like the SLA, disaster recovery, and Backup retention and so on.

What are your data protection requirements?

Create an independent test-backup environment to ensure that your

production environment will work with the changed backup solutions.

The test-backup environment helps to keep in study the effects of a new

backup solution and of the changes made to the hardware and the

software infrastructure over a period of time

Have you added the requirements of the

test-backup environment?

Identify the annual data growth factor to calculate capacity increase

over years.

Have you added any resulting growth factor

to your total backup solution?

Ensure that you have computed the growth in amount of data in the

next six months to a few years. Based on the expected growth you can

identify the strategy to expand your existing storage configurations, as

required.

Have you computed the amount of data you

will need to backup in the next six months to

a few years from now?

See “When should the backup take place?” on page 18.

See “Analyzing your backup requirements” on page 14.

See “When should the backup take place?” on page 18.

See “What is the retention period?” on page 20.

When should the backup take place?

To correctly size and configure your backup solution, you must decide on the type

and frequency of your backups. When considering a backup schedule you need to

consider the following checks:

Table 2-3

Schedule a backup

Additional commentsChecks to be performed

The size calculation and deduplication ratio for taking full backups differ

from the size calculation and deduplication ratio required for an

incremental backup.

Will you perform daily-incremental backups?

18Analyzing your backup requirements

Analyzing your backup requirements

Table 2-3

Schedule a backup (continued)

Additional commentsChecks to be performed

When you determine this information helps in calculating the storage

capacity requirements for over longer period of time. The size calculation

and deduplication ratio for taking full backups differ from the size

calculation and deduplication ratio required for an incremental backup.

When will you perform a full backup?

■ Weekly

■ Bi-weekly

■ Monthly

Considering that it takes 2 seconds / 3 seconds per job, it means that

approximately ~15000 jobs per backup window (1000 per hour) are run.

If the job count exceeds the 2-second or 3-second rule, you may need

to consider increasing the backup window or setup a new domain.

Also, the number of jobs is limited by the total number of streams that

appliance can take and also on the total throughput of the deduplication

storage on the appliance.

How many jobs will be run per day?

The length of a window dictates several aspects of your backup strategy.

For example, you may want a larger window of time to back up multiple,

high-capacity servers.

What is the window of time that is available

to complete each backup?

In some scenarios you may want to only use AdvancedDisk for backup.

An AdvancedDisk is the normal disk backup, performed without any

deduplication.

Deciding on whether you want to configure a deduplication solution can

help you opt for a mix of MSDP and AdvancedDisk.

Would you want to configure a deduplication

solution to take backups?

NetBackup Accelerator uses a platform and file system independent

track log to intelligently detect changed files and send the changed

segments from those files to media server. These changed segments

are written to a supported storage pool in the NetBackup appliance.

Although the primary benefit from NetBackup Accelerator is for

performing full backups, it also reduces a subset of costs in running

incremental backups.

Would you want to consider using the

advanced NetBackup features such as

NetBackup accelerator?

The NDMP (Network Data Management Protocol) is used along with

NetBackup Accelerator to perform backup and recovery. The NetBackup

appliance supports NDMP stream handlers for EMC Celerra and NetApp

which results in very high deduplication rate. Using Accelerator we can

protect shares as mounted file systems. However, this is not a

comprehensive backup of filers.

Would you be adopting NDMP to perform

backups?

The backup schedule is greatly affected if the backup is run locally or

is transferred to an off-site location. The time to transfer a local backup

to the off-site location will need to be estimated and considered at the

time of scheduling a backup.

Do you plan to run an Off-site backup or

Local backup?

19Analyzing your backup requirements

Analyzing your backup requirements

Table 2-3

Schedule a backup (continued)

Additional commentsChecks to be performed

Determining the total number of systems that are local or remote can

help determine the backup cycles.

Is the computer system local or remote?

This can help to reduce the time it takes to initiate certain operations.

However, user-directed operations can also result in higher support

costs and the loss of flexibility in storage allocation and usage for

backups. User-directed operations can monopolize media and tape

drives when you most need them. They can also generate more support

calls and training issues while the users become familiar with the new

backup system.

Do you want to allow the users to run the

backups and restores for their computer

systems?

Identify the type of networks you plan to use for scheduling backups.

Based on the amount of data that you want to back up and the frequency

of those backups, you can also consider installing a private network for

taking backups. Identifying this information can help you account for

the time required to perform the backups over a network and select the

best time period when the backup should be taken

Note: It is recommended that you use SAN Client and dedicated HBA

on the NetBackup client for taking backups.

Do you plan to back up any system over a

network?

Identify the backup expiration time period for each of your policies, thus

determining the possible restore options. For example, one of the

commonly adopted policies is to expire your incremental backups after

2 weeks or 1 month and your full backups after 6 months. With this

policy, you can restore any daily file change from the previous weeks

or month and restore data from full backups for the previous 6 months

What is your policy for backup expiration?

See “What is the retention period?” on page 20.

See “How much data do you want to back up?” on page 17.

See “What do you want to backup?” on page 14.

See “Analyzing your backup requirements” on page 14.

What is the retention period?

Now that you have identified what data to backup and how much data is to be

backed up, you now need to identify the length of the retention period for your

backup. Retention period is the time period during which data is stored and

maintained in a backup system. Upon the completion of the retention period the

retained data is finally disposed.

20Analyzing your backup requirements

Analyzing your backup requirements

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