About Fulldata Storage Checkpoint and NetBackup for SAP

The Fulldata Storage Checkpoint, once started makes a copy of the original file block at the moment before the block is about to be changed. When you use Fulldata Storage Checkpoints, tablespaces or data files are in backup mode for only a few seconds while the Storage Checkpoint is created. The database is put in this mode so the extra archive log space that is used is smaller.

However, space in the file system is needed to keep a copy of the original block of data that changed. If the workload is light during the backup an additional 10% of the file system size is usually sufficient. Also, if the backup window is relatively short (such as for incremental backups), an additional 10% of the file system size is usually sufficient. If the database has a heavy workload while a full backup is running, the file systems may require more space. The space requirement depends on the rate of change.

While archive log mode is required when the database is online, this mode provides the best recoverability for taking offline Storage Checkpoints, too.