1. Introduce NetBackup Accelerator

2. What is NetBackup Accelerator?
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 2
NetBackup 7.5 Differences: Featured Enhancements

3. Today’s backup challenges
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) 3

4. Requirements and prerequisites
System requirements
Any client OS platform that is supported by NetBackup
Windows change journal for optimized performance (optional)
Versions
NetBackup 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) 4

5. Background
NetBackup currently supports NTFS change journal, but is limited to:
Incremental backups
One backup policy
Inclusion of all NTFS volumes for the specified clients 5

6. 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.

7. 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. 7

8. Location of the client track log files
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 8

9. 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 9

10. NTFS change journal databases
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. 10

11. 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.

12. Configuration
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.

13. Modes of operation Standard Accelerator forced rescan
Windows NTFS change journal

14. Enabling Accelerator

15. Setting the Accelerator forced rescan option

16. Setting the Use Change Journal option

17. Backup without NetBackup Accelerator or change journal

18. NetBackup Accelerator enabled; change journal not enabled

19. NetBackup Accelerator and change journal enabled

20. Thank You!