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Introduce NetBackup Accelerator

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• Provides fast streamlined backups to disk• Implements an Accelerator track log and utilizes

the Windows NTFS change journal, deduplication, and optimized synthetic backups

• Enables full backups of files and folders with speeds equivalent to incremental backups

What is NetBackup Accelerator?

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• Completing backups within a backup window– Too much data growth, either through internal

expansion or acquisition– Significant data change rates– Shorter, overlapping, or non-existent backup windows

• Protecting data– Large, mission-critical applications– Very large file systems– Virtual machines

• Improving recovery time objectives (RTOs) and recovery point objectives (RPOs)

Today’s backup challenges

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• System requirements– Any client OS platform that is supported by NetBackup– Windows change journal for optimized performance (optional)

• VersionsNetBackup 7.5 for master server, media server, and client

• Licenses NetBackup Data Protection Optimization Option (formerly NetBackup Deduplication

Option)• Policies

Standard and MS Windows• Storage Units

– PureDisk (MSDP, PureDisk, appliance)– Cloud storage plug-ins– OpenStorage (OST) vendor qualified for Accelerator support

(see NetBackup server hardware compatibility list)

Requirements and prerequisites

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NetBackup currently supports NTFS change journal, but is limited to:

• Incremental backups• One backup policy • Inclusion of all NTFS volumes for the specified

clients

Background

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Architecture overview

• The base architecture for this feature implements a client track log and leverages Windows NTFS change journal.

• The device mappings file contains OST vender and hardware information.

• No new NetBackup processes or binaries are being added.

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Client track log files

The client track logs are key aspects of NetBackup Accelerator:

• The track log is specific for a given policy, client, master server, storage server, and backup selection.

• The NetBackup client track logs are circular files.• The client track logs contain checksum entries for

each file being backed up.

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Location of the client track log files

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The client track logs are found on each client in the following directory: install_path\NetBackup\track\master_server\storage_server\client\policy_name\backup_specification

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The NTFS change journal

• Is an optional feature that can be used with NetBackup Accelerator

• Is monitored by NetBackup to determine which files and directories need to be included in a backup

• Eliminates the need to perform a full file system scan• Maintains records pertaining to files and directories• Has records identified by an update sequence number

(USN)• Are circular databases• Is increased to one million entries

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There are three databases files created and maintained at the root of each NTFS volume.– VxCJMon.dat contains records

pertaining to files and directories that have been created and modified.

– VxCJDelete.dat contains records pertaining to files and directories that have been deleted.

– VxCJInfo.dat contains records pertaining to the backup policies, backup selections, and backup schedules and their corresponding USNs.

NTFS change journal databases

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Additional NTFS change journal information

• Integration with the NTFS change journal does not guarantee that the NTFS change journal is used on every backup.

• The change journal data can be used with:– Incremental backups: The Use accelerator option is

enabled or not enabled.– Full backups: The Use accelerator option is enabled.

• If the change journal data cannot be used for a backup:– NetBackup reverts to a full file system scan.– A message is logged in the Job Details dialog box for the

backup.

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• NetBackup Accelerator is installed with base NetBackup 7.5.• No new binaries are required.• NetBackup Accelerator must be enabled in the policy.• If NTFS change journal is used, it must be enabled in each

client’s host properties.• NTFS change journal and NetBackup Accelerator can be used

independently of each other.• The verification of supported storage unit is done at policy

creation time.

Configuration

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StandardAccelerator

forced rescanWindows NTFS change journal

Modes of operation

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Enabling Accelerator

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Setting the Accelerator forced rescan option

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Setting the Use Change Journal option

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Backup without NetBackup Accelerator or change journal

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NetBackup Accelerator enabled; change journal not enabled

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NetBackup Accelerator and change journal enabled

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Thank You!