Creating concurrent copies during basic duplication

You can create multiple duplicate images concurrently in Vault by selecting either Multiple Copies on the basic Duplication tab or Advanced Configuration on the basic Duplication tab, which displays the advanced duplication criteria.

You can use the following instructions to create multiple copies concurrently from the basic Duplication tab.

For instructions on how to configure duplication in Vault, see the following:

To create concurrent multiple copies using the basic duplication tab

  1. Indicate whether the images you want to duplicate reside on disk storage units only or on disk or media storage units.

  2. Enter the number of drives to use for reading backup images for duplication.

    When you enter a number of read drives, the same number is entered into the destination Write Drives field. You must have an equivalent number of read and write drives available.

  3. To use a media server that is different from the server that wrote the images, check Alternate Read Server and select the media server to use. (Alternate read servers apply to NetBackup Enterprise Server only.)

    If robots (or drives) are shared by more than one media server, you can specify a different media server to read the original backups than the media server that wrote the backups.

  4. Select Multiple Copies, and then click Configure.

  5. In the Multiple Copies dialog, select the number of copies to create.

    The number of copies you choose cannot exceed the number of copies specified in the Maximum Backup Copies field for the NetBackup master server. (Configured in NetBackup Management > Host Properties > Master Server > server_name > Global NetBackup Attributes.) By default, the value is two, which means one original backup and one copy.

  6. If you want one of the copies to be the primary copy, select which copy is to be primary.

    NetBackup restores from the primary backup, and Vault duplicates from the primary backup. By default, the original backup image created during a NetBackup policy job is the primary copy. If the copy that you indicate as primary fails, and you configured continue as the fail option, the first successful copy is the primary copy.

  7. Specify the storage unit to be used for the duplication. When specifying the storage unit, the following applies:

    • If the Media Manager or Network Data Management Protocol (NDMP) storage unit has more than one drive, the source and destination storage units can be the same.

    • NDMP storage units are supported only when one copy is created.

    • All storage units must be connected to the same media server.

  8. Specify a volume pool for each copy.

    NetBackup does not verify in advance that the media ID selected for the duplicate copy is not the same as that of the piece of media that contains the original backup. Because of this potential deadlock, specify a different volume pool to ensure a different piece of media is used.

  9. Specify the retention level for each copy.

    Each image copy can have a separate expiration date. If you do not specify a retention level, it is the same as the primary copy. If you specify a numeric retention level, the expiration date for the duplicate media is calculated by adding the specified retention period to the date the original backup was created. If you specify Use Mappings for the retention level, the retention period is based on the retention period of backup image copy 1.

    When the retention period expires, information about the expired backup will be deleted from the NetBackup and Media Manager catalog, the volume will be recalled from off-site storage, and the backup image will be unavailable for a restore.

  10. Indicate what action is to be taken if a copy fails.

    In Vault, if you choose Fail All Copies, all copies of that image fails, independent of the success or failure of other image copy operations. The next time the Vault profile runs, Vault again tries to duplicate the image if the following conditions are true:

    • The image is selected.

    • The Vault profile did not eject the primary backup.

    By default, the option is configured to Fail All Copies in Vault.

    If you choose Continue for all copies, Vault considers the duplication job successful if any of the copies succeed. However, it is possible that a copy of the image may never get vaulted. It is probable that at least one copy will succeed, but it may not be the copy assigned to the off-site volume pool.

  11. Specify who should own the media onto which you are duplicating images:


    NetBackup chooses the media owner.


    Specifies that the media server that writes to the media owns the media. No media server is specified explicitly, but you want a media server to own the media.

    A server group

    All media server groups configured in your NetBackup environment appear in the drop-down list. Specifying a media server group allows only those media servers in the group to write to the media on which backup images for this policy are written.

  12. Click OK to return to the basic Duplication tab.

  13. Specify the priority of the Vault duplication jobs, from 0 to 99999. A larger number is higher priority. All duplication jobs for the profile run at the same priority.

    Vault duplication jobs compete with other process in NetBackup (such as regularly scheduled backups) for resources, including tape drives. If you want your Vault duplication jobs to obtain resources before other processes, assign a higher priority to the Vault jobs than to other NetBackup processes. Priority for backups, restores, and synthetic backups is assigned in the master server Global Properties.

  14. To preserve multiplexing, select Preserve Multiplexing.

    Multiplexing is the process of sending concurrent-multiple backup images from one or more clients to the same piece of media. This process speeds up duplication but slows down restores and disaster recovery processes. If you select the option to preserve multiplexing, the multiplexed duplication process occurs for all multiplexed images that are selected for duplication during a given Vault session.

    In addition, if the source image is multiplexed and the Preserve Multiplexing option is selected, ensure that the destination storage unit configured for each copy has multiplexing enabled. Multiplexing is configured in NetBackup Management > Storage Units.

  15. Select Duplicate Smaller Images First (applies only to disk backup images) to duplicate images in smallest to largest order.

    By default, Vault duplicates images from largest to smallest, which improves tape drive utilization during duplication and duplicates more data sooner. If you know that your most important data is in smaller backup images, you can select this option so that those images are duplicated before the larger images. This choice does not affect the total time required to duplicate the images.

  16. Check Expire Original Disk Backup Images... and then enter the number of hours after this Vault session completes to expire the disk images.

    Use this option to free up space on the disk for subsequent backup images. Be sure you allow enough time for the duplication operation to complete.

    If the duplication of a disk image fails, the disk image does not expire.

  17. After you complete the dialog box, click OK.

More Information

About the Duplication tab

Assigning multiple retentions with one profile