Veritas NetBackup™ for SAP Administrator's Guide
- Introduction to NetBackup for SAP
- Introduction to NetBackup SAP HANA
- Installing NetBackup for SAP
- Installing NetBackup for SAP HANA
- Configuring NetBackup for SAP
- About configuring a backup policy for an SAP database
- About adding schedules to a NetBackup for SAP policy
- NetBackup for SAP backup scripts
- About SAP configuration files
- Configuring NetBackup for SAP HANA
- Configuring the master server for NetBackup SAP HANA
- Configuring the NetBackup client
- Configuring the SAP HANA Agent
- Performing backups and restores of SAP
- Using BRTools to start an SAP backup (for Oracle database only)
- Performing an SAP archive
- Restarting failed NetBackup for SAP backups and restores
- Restarting NetBackup for SAP backups
- Restarting SAP database restores on Oracle
- Performing backups and restores of SAP HANA
- NetBackup for SAP with Snapshot Client
- How the NetBackup for SAP Snapshot Client works
- About configuring Snapshot Client with NetBackup for SAP
- About configuring NetBackup for SAP block-level incremental backups on UNIX
- Configuring policies for BLI backups with NetBackup for SAP
- About NetBackup for SAP restores of volumes and file systems using snapshot rollback
- NetBackup for SAP on MaxDB databases
- Using NetBackup for SAP on a MaxDB database to perform backups and restores
- Troubleshooting NetBackup for SAP and SAP HANA
- NetBackup debug logs and reports
- sapdba logs and messages (Oracle-based SAP environments only)
- About troubleshooting NetBackup for SAP HANA
- Appendix A. backint command line interface
- Appendix B. Input and output files for SAP HANA
- Appendix C. backint -i in_file contents
- Appendix D. backint -o out_file contents
- Appendix E. NetBackup for SAP environment variables for backint
- Appendix F. NetBackup for SAP configuration or bp.conf file settings
- Appendix G. Parameters used in initSID.utl
- sort_backup_type <value>
- sort_restore_type <value>
- Appendix H. Configuring split mirror backups
- Appendix I. Register authorized locations
How BLI works with NetBackup for SAP (UNIX)
BLI backup supports two types of incremental backups: differential and cumulative. Full, differential incremental, and cumulative incremental backups are specified as part of the policy schedule configuration. When a restore is performed, NetBackup restores an appropriate full backup. Then it applies the changed blocks from the incremental backups.
Restoring any of the incremental backup images requires NetBackup to restore the last full backup image and all the subsequent incremental backups. The restore process continues until the specified incremental backup image is restored. NetBackup performs this restore process automatically, and it is completely transparent. The media that stored the last full backup and the subsequent incremental backups must be available, or the restore cannot proceed.
Note that restoring a file rewrites all blocks in that file. The first subsequent differential incremental backup and or all subsequent cumulative incremental backups back up all the blocks in the restored file. After an entire database is restored, the first subsequent backup results in a full backup.
The restore destination can be a VxFS, UFS (Solaris), JFS (AIX), or HFS (HP-UX) file system. The destination VxFS file system does not need to support the Storage Checkpoint feature to restore files. However, a VxFS file system with the Storage Checkpoint feature is needed to perform BLI backups of the restored data.
This topic uses the following terms to describe BLI backups:
A backup in which NetBackup backs up each database file completely, not just data blocks that have changed since the last full or incremental backup.
Cumulative BLI Backup.
This type of backup is a backup of all the changed blocks in the database files since the last full backup. A cumulative BLI backup image contains only the data blocks of database files that changed since the last full backup. A cumulative BLI backup can reduce the number of incremental backup images that must be applied during a restore operation. This speeds up the restore process.
Differential BLI backup.
A backup in which NetBackup performs a backup of only those data blocks (within the database files) that changed since the last backup. The previous backup can be of type full, cumulative incremental, or differential incremental.
When NetBackup initiates BLI backups, it creates, manages, and uses the appropriate Storage Checkpoints of the filesystem(s) hosting the Oracle data file systems. These Storage Checkpoints identify and maintain a list of modified blocks.