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 for release 3.1 and 3.1.1 provides essential guidance for optimizing the performance and capacity of Veritas NetBackup appliances." 在这份文档中，Veritas NetBackup Appliance Capacity Planning and Performance Tuning Guide主要涵盖了以下几个关键知识点： 1. **容量规划(Capacity Planning)**: 容量规划是确保NetBackup Appliance高效运行的关键步骤。这涉及到对备份工作负载的评估，包括数据增长速率、备份频率、保留策略等。通过这些信息，管理员可以计算出所需的存储空间，并合理分配硬件资源，如CPU、内存和网络带宽。 2. **性能调优(Performance Tuning)**: 这一章节会教导管理员如何监控和调整NetBackup Appliance的各项性能指标，如I/O速度、CPU利用率、内存使用情况和网络吞吐量。调优的目标是确保备份和恢复操作能够在预定的时间内完成，同时最小化对其他业务的影响。 3. **硬件资源管理**: 文档会详细介绍如何优化硬件资源，包括存储配置（如RAID级别选择）、网络配置（如端口聚合和带宽管理）以及处理能力的调整，以适应不断变化的备份需求。 4. **软件组件优化**: NetBackup Appliance集成了多个软件组件，包括NetBackup软件、操作系统和其他第三方工具。这部分会讨论如何优化这些组件的设置，以提高整体性能和稳定性。 5. **监控与诊断(Monitoring and Diagnosis)**: 有效的监控工具和日志分析可以帮助识别潜在的性能瓶颈和故障。文档将提供关于使用内置监控工具、日志分析方法以及如何设置警报阈值的指导。 6. **最佳实践(Best Practices)**: 文档会提供一系列推荐的最佳实践，这些实践是根据Veritas的经验和用户反馈总结得出的，可帮助管理员避免常见的问题，确保系统的高效运行。 7. **第三方软件和开源许可(Third-party Programs and Open Source Licenses)**: 文档提到了产品可能包含的第三方软件和开源组件，并指出Veritas需遵循的第三方许可规定。用户需要了解这些许可，特别是当涉及到开源或免费软件时，用户的权利和义务可能会受到这些许可协议的影响。 8. **法律条款(Legal Notices)**: 用户必须遵守产品附带的许可协议，这可能会影响他们在使用开源或免费软件时的权利和义务。Veritas提供了相关的法律条款链接，供用户查阅详细信息。通过遵循这份指南，管理员能够有效地管理和优化NetBackup Appliance的性能，确保备份解决方案的可靠性和效率。对于任何部署了Veritas NetBackup Appliance的企业来说，这是一份至关重要的参考资料。

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

"Veritas NetBackup™ Appliance Capacity Planning and Performance Tuning Guide

Veritas NetBackup Appliance 容量规划与性能优化指南

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