DEDUPLICATION FOLDER BACKUP EXEC FULL
DEDUPLICATION FOLDER BACKUP EXEC PLUS

The target volume can be the original reformatted volume or a freshly created volume.

DEDUPLICATION FOLDER BACKUP EXEC FULL

It is recommended to always perform full volume restore to a freshly formatted volume of equivalent or greater size than the original volume. On the other hand, restoring to the original or equivalently-sized volume from a nonoptimized backup will likely reach a disk-full condition because the files will be replaced at their full logical (non-deduplicated) size.īlock-level restore from an Optimized Backup is automatically an optimized restore because the restore occurs underneath data deduplication, which works at the file level.

Also, the size of the restored data in an optimized full volume restore is known to fit on a volume of the original size. Restoring volumes in this manner has the advantage of faster recovery time as compared to full-volume restore from a nonoptimized backup store because the amount of copied data is much smaller. The complete set of data deduplication metadata and container files are restored, then the complete set of data deduplication reparse points are restored, followed by restore of all non-deduplicated files. Because the data deduplication optimization job appends chunks to the chunk store container, backup applications may benefit from an incremental backup at the sub-file level, one that backs up new and modified file ranges instead of entire files.įull Volume Restore from Optimized Backupįile-level full volume restore can and should be performed in an optimized manner by essentially reversing the procedure described in the Optimized Backup section.Therefore, the data deduplication optimization job usually results in incremental changes to the chunk store- most files are untouched, some are appended, and some new ones may be created. When its size reaches about 1 GB, that container file is sealed and a new container file is created. Remember that new chunks are appended to the current chunk store container. Back up the changed chunk store container files.Back up only the changed user files, including reparse points that were created, modified, or deleted since the previous backup.Incremental Optimized BackupĪ backup application can perform an incremental optimized backup as follows:

DEDUPLICATION FOLDER BACKUP EXEC PLUS

Selective backup, in which most of the volume is being backed up, may also benefit from using the optimized backup approach, if the logical size of the selected files is greater than the physical size of the selected files plus the chunk store files. Optimized backups are faster, because there is less I/O (smaller backup) and because the optimized files are not 'rehydrated' during the file copy operations. In these cases the backup will be smaller, because the total size of the optimized files (reparse points), non-optimized files (not in-policy) and data deduplication store container files is significantly smaller than the full logical size of the volume. In many cases, such as a full volume backup (either block-level or file-level), performing an optimized backup will result in a smaller, faster backup than an unoptimized backup. Copies the optimized files (reparse points) and chunk store container files as-is from the shadow copy to the backup store.

Specifies the FILE_FLAG_OPEN_REPARSE_POINT flag when opening the data deduplication-optimized files.

Uses a shadow copy of the optimized volume.

In optimized backup, the backup application does the following:

Selective Restore from a Data Deduplication-Enabled Backup Store.

Selective Partial Volume Restore to Newly Formatted Volume.Selective Restore from Optimized Backup.Full Volume Restore from Optimized Backup.In addition to reading this documentation, you should also study the DedupBackupRestore sample, which is useful for understanding multiple restore scenarios. There are also situations where it is preferable to perform nonoptimized backup and restore. The data deduplication feature enables backup applications to perform optimized backup and restore of volumes that are enabled for data deduplication.

Deduplication folder backup exec