NetBackup™ NAS Administrator's Guide
- Section I. About NAS backups
- Section II. Using NAS-Data-Protection (D-NAS)
- D-NAS overview
- D-NAS Planning and Tuning
- Pre-requisites for D-NAS configuration
- Volume multi-host backup
- Configure D-NAS policy for NAS volumes
- Using accelerator
- Using Vendor Change Tracking
- Replication using D-NAS policy
- Restoring from D-NAS backups
- Troubleshooting
- Section III. Using NDMP
- Introduction to NetBackup for NDMP
- About NetBackup for NDMP
- Types of NDMP backup
- About assigning tape drives to different hosts
- Installation Notes for NetBackup for NDMP
- Configuring NDMP backup to NDMP-attached devices
- About Media and Device Management configuration
- About creating an NDMP policy
- About enabling or disabling DAR
- Configuring NDMP backup to NetBackup media servers (remote NDMP)
- Configuring NDMP DirectCopy
- Accelerator for NDMP
- Remote NDMP and disk devices
- Using the Shared Storage Option (SSO) with NetBackup for NDMP
- NAS appliance information for NDMP
- Vendor-specific information
- EMC Celerra
- NetApp
- Using NetBackup with NetApp's Data ONTAP 8.2 cluster mode
- Using NetBackup with NetApp's Data ONTAP 8.2 cluster mode
- Backup and restore procedures
- Troubleshooting
- Using NetBackup for NDMP scripts
- Introduction to NetBackup for NDMP
Using VCT with accelerator for D-NAS
With NetBackup 10.2 onwards, you can enable accelerator along with VCT in the D-NAS policy for NAS backups. VCT along with accelerator technology is supported with Dell EMC PowerScale (Isilon), NetApp, Nutanix Files, and Qumulo NAS arrays.
With NetBackup 10.3, you can enable this feature for a full schedule also, which enables the forever-incremental backup capability. After the initial full backup, no more full backups are required.
During full or incremental backups, NetBackup leverages the storage array vendor's technology to get the change list (added, modified, and deleted files) between the two point-in-time snapshots. In the subsequent incremental or accelerator backups, NetBackup need not do a complete scan of the NAS volumes to determine the change list.
After an initial full backup that protects all data from the filer, NetBackup accelerator backs up only the changed data from the filer to the media server.
Combining both these functions in a single backup policy, the backup window is reduced to full and incremental backups.
A regular full scan of the volume is performed for the full schedule with forced re-scan enabled in the schedule. NetBackup does not use the VCT information in this scenario.
Irrespective of the schedule, the change list is obtained using VCT. This change list is used as the source for backup.