"Veritas NetBackup™ Appliance Capacity Planning and Performance Tuning Guide"

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NetBackup 52xx and 5330 Appliance是一种备份和恢复解决方案，用于处理大量的数据。这个指南提供了关于该设备的容量规划和性能调优的指导。容量规划是为了确保设备具有足够的存储空间来处理备份任务。该指南提供了计算存储需求的方法和建议，以满足不同组织的需求。它还提供了如何配置设备以支持高效备份和恢复的指导。性能调优是为了保证设备能够以最佳性能运行。该指南提供了一系列的性能优化建议，包括调整备份和恢复任务的参数，优化设备的网络连接和硬件配置，以及监控和管理设备的性能。此外，该指南还提供了关于设备的技术规格和功能的详细信息。它解释了设备的各种组件和其工作原理，包括存储、网络和处理能力等方面。该指南还包含了适用于NetBackup 52xx和5330 Appliance的操作系统和软件要求，以及安装和配置设备的步骤。最后，该指南还提供了故障排除和问题解决的指导，以帮助用户解决设备运行中可能遇到的各种问题。总而言之，NetBackup 52xx and 5330 Appliance Capacity Planning and Performance Tuning Guide是一个全面的指南，提供了关于该设备容量规划和性能调优的详细信息。它是一个非常有用的资源，可以帮助用户有效地配置和管理他们的备份和恢复环境。

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?

16Analyzing 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 17.

See “Analyzing your backup requirements” on page 13.

See “When should the backup take place?” on page 17.

See “What is the retention period?” on page 19.

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?

17Analyzing 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?

18Analyzing 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 19.

See “How much data do you want to back up?” on page 16.

See “What do you want to backup?” on page 13.

See “Analyzing your backup requirements” on page 13.

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.

19Analyzing your backup requirements

Analyzing your backup requirements

Table 2-4

Identifying the length of the retention period

Additional commentsFactors deciding the retention period

Most organizations lay out specific guidelines on creating retention

policies and the time period they would want to hold the backed-up

data. These guidelines are considered vital in determining the retention

policy for an organization.

What are the standards specific to your

organizational for creating a retention policy?

There can be certain critical projects that may require you to hold the

data for a longer period of time than your standard retention policy.

Identify such projects and the approximate time required to retain the

information. This can help you prioritize and allot specific backup storage

to projects with such retention period requirements.

What is your Projects requirement to retain

the data?

There can be user requirements that may need you to alter the generic

retention policy to accommodate requests to retain data backed up by

specific users or user groups.

What are the user-specific requirements on

retaining data?

Are their users who want to retain specific

data for a longer period?

There can be business-specific requirements that mandate you to hold

specific data for a longer period. For example, market research, findings

of a research and development department.

What are the business requirements to

identify the retention time?

The legal departments or the regulatory bodies of a country may have

specific guidelines on retaining data. For example, organizations may

require to retain the financial data of their organization for over a specific

number of years. Such polices affect the length of the retention period.

What are the regulatory or legal department

laid requirements to retain the data?

The retention period is directly proportional to the number of tapes you

need and the size of your NetBackup image database. Your NetBackup

image database keeps track of all the information on all your disk drives

and tapes. The image database size is tightly tied into your retention

period and the frequency of your backups.

What is the size of your NetBackup image

database?

See “When should the backup take place?” on page 17.

See “How much data do you want to back up?” on page 16.

See “What do you want to backup?” on page 13.

See “Analyzing your backup requirements” on page 13.

Record your backup requirements

This section provides templates that you can use and customize to record the

backup requirements in your organization.

■ See “Template to record computer system information” on page 21.

20Analyzing your backup requirements

Analyzing your backup requirements

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