Catalog Backup Source Options

The Backup Source Options dialog controls how Catalogic DPX behaves during a backup operation when it encounters certain situations involving media volumes, files, and nodes. The Backup Source Options dialog also allows you to run scripts automatically on UNIX or Windows nodes before or after a backup job. See “Pre-Scripts and Post-Scripts” in the Reference Guide.

To set backup source options:

  1. Open the Backup Source Options dialog box by doing one of the following:

    • Right-click the Enterprise name or icon to display a context menu. Then select Set Source Options.

    • From the menu bar, select Backup > Set Source Options.

    • On the task panel, click Set Source Options. The Backup Source Options dialog box appears.

  2. Click the Source tab, then input data as needed:

  • Verify Backup

    Controls the data verification technique for writing data to a media volume. The higher the verification level, the greater the safety and the longer a backup takes. Each verification level builds upon the preceding level. For example, level 3 performs level 1 and level 2 verification as well. Select one of the following options:

    • No verification

      Writes data to the media volume without verification. This is the fastest option and relies on the tape device for data verification.

    • Level 1

      Reads the tape to ensure that it is readable.

    • Level 2

      Reads the tape and ensures that the SIDF headers are present and contain the correct information.

    • Level 3

      Ensures that the checksum of each file on the tape matches the one contained in the SIDF header for that file. This verification is only performed if the checksum feature is set to On in Set Job Destination Options. The tape and SIDF headers are also read and verified (levels 1 and 2).

  • Data Compression

    Compresses data prior to network transmission.

    Select Yes to compress data prior to transmission at the node being backed up. This setting is recommended if there is processing power available on the client nodes and network bandwidth is limited. This setting minimizes the impact of data transmission on data lines. Or, select No to disable the data compression.

  • Skip NFS Volumes

    Determines expected behavior when encountering an NFS (network file system) volume during a backup operation. NFS volumes are remotely mounted volumes owned by another node. This option also controls the backup behavior of drives that are mapped to the Microsoft Windows node (CIFS mount point). Select No to back up NFS volumes and drives that are mapped to the Microsoft Windows nodes. Or, select Yes so as not to back up NFS volumes or drives that are mapped to the Microsoft Windows nodes.

  • Network Encryption

    Encrypt data while transmitting it through networks to enhance security. Typically, the encrypted data transfer can lower the data transfer speed. Select Yes to enable the encrypted data transfer. Or, select No to transfer data without encryption.

    • Down Node Retries

      Controls how DPX behaves when it cannot establish contact with a node during a backup operation. If you enter zero, DPX skips unreachable nodes. If you enter a number, DPX waits until all the reachable nodes have been backed up and then retries the nodes that it could not back up on its first attempt. The number you enter determines how many times DPX tries to reach unreachable nodes.

    • Task Retry Intervals

      Determines how long to wait before retrying failed tasks.

      When a task fails (due to permission problems, open files, interim job changes, etc.), it waits the number of minutes specified in this field before attempting that task again. Because the same failure might occur if the task is retried too soon, it is better to allow some time for an error to be corrected before retrying the task. A task is only retried once. Failing tasks appear in error message lists in the Job Log. All tasks are subject to retry.

  • Catalog Open Files

    If you are not using an open file manager, this option tells Catalogic DPX whether to catalog open files encountered on UNIX systems. On UNIX nodes, Catalogic DPX backs up the file and then checks to determine if it has been modified while the backup transpired. If it has, the file is considered open. Cataloging open files is not generally recommended. Select No so as not to save the backed up file if it detects that the file has been modified during the backup process and the number specified in the Open File Retry field has been reached. Or, select Yes to catalog the backed up file if it detects that the file has been modified during the backup process and the number specified in the Open File Retry field has been reached. Catalogic DPX catalogs its last attempt to back up an open file if it finds the file is still open. Note that cataloging a file that has been modified during the backup can compromise the integrity of the file when that file is restored.

Note. Do not configure this option but keep the default settings for Catalog Backup.

  1. Click the Script tab, then input data as needed:

  • Pre-Job Script

    Enter the name of a script to execute prior to the actual job.

  • If Pre-Script fails

    The action to take if the Pre-Job Script fails to successfully complete.

  • If Job fails

    The action to take if the Job fails to successfully complete.

  • Post-Job Script

    Enter the name of a script to execute after the actual job.

See also. For more information about the Pre-Job Scripts and Post-Job Scripts, see Chapter 29: Pre-Scripts and Post-Scripts in the Reference Guide.

You can use a post-job script to assist with more complex offsite strategies, such as triggering NetApp Snapmirror, starting secondary backup job, or requesting a network share server to replicate DiskDirectory volsers to an alternate location.

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