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NetVault Backup Plug-in for SnapMirror to Tape 11.4.5 - User Guide

Configuring default settings

1
Start the Backup Job Wizard, and click Create New next to the Selections list. Open the NetVault Backup Server. Select NDMP SnapMirror to Tape, and in the Actions list, click Configure.
In the Navigation pane, click Change Settings. On the Configuration page, click Server Settings, and then click Plugin Options.

BLI Snapshot Creation Timeout

This setting determines the amount of time the plug-in waits for creation of snapshots for BLI backups. The timeout value is specified in number of seconds. The default value is 600 seconds.

You can increase the timeout value for snapshot creation if the volume is large or the filer requires an excessive amount of time to complete the task.

BLI Snapshot Deletion Timeout

This setting determines the amount of time the plug-in waits for deletion of snapshots during BLI backups. The timeout value is specified in number of seconds. The default value is 600 seconds.

You can increase the timeout value for snapshot deletion if the volume is large or the filer requires an excessive amount of time to complete the task.

BLI Incremental Backup Can Delete Previous Differential Snapshot

By default, when an Incremental Backup is performed, the plug-in deletes the snapshot that was created for the previous Incremental or Differential Backup.

If you do not want to delete the snapshot for a previous Differential Backup, clear this check box. This setting can be useful when you want to use the snapshot as the base for subsequent backup.

Delete All Previous Snapshots Prior to Starting a Full BLI Snapshot

To delete all existing snapshots and reclaim disk space before starting a BLI Full Backup, select this check box.

Snapshot Backup Selection Cannot be Used with Create Snapshot Option

If you select the Create New Snapshot check box after selecting a snapshot in the selection tree, the plug-in reports an error and fails the job. When you clear this check box, the plug-in reports an error, but does not fail the job.

Codepage for UTF-8 Conversions

Type the codepage identifier for UTF-8 conversions. Use this setting with the Use UTF-8 Conversions option described in the section Adding a NetApp filer.

Translations depend on the configuration, locale, and code sets installed on the system. For a list of codepage values, see the operating system documentation

Use APM UTF-8 Conversion

To store and index UTF-8 character sets for browsing, select this check box. This setting allows you to browse the files in a native UTF supported language, such as Japanese. Without this setting, the plug-in indexes the files by filer-specific NDMP metadata.

Delete Unsuccessful Jobs On Completion

By default, NetVault Backup removes the subjobs for Phase 2 backups whether the phase completes successfully or fails. You can use the Delete Unsuccessful Jobs On Completion setting to change the default behavior. If you clear this check box, the subjobs generated during Phase 2 backups are removed only if both Phase 1 and Phase 2 backups complete successfully.

Configuring media block size

When configuring media block size for data transfers, verify that you set the same block size on the filer and the target drives.

1
On the filer, set the DATA_BLOCK_SIZE variable.
4
In the Drive Performance Options dialog box, configure the Drive Block Size setting.
Type or select 240K or 256K depending on the value set for the DATA_BLOCK_SIZE variable. Changes to this setting are only applied to tapes that are blank or relabeled.
a
Open the configuration file ndmpsmtversions.cfg in a text editor. You can find this file in <NetVault Backup home>/config.
b
Set the Filer Block Size Preferred parameter to FALSE. By default, it is set to TRUE:
Linux and UNIX: If necessary, increase the amount of shared memory, typically the shmmax setting.
Windows: If necessary, increase the MaximumSGList setting for the tape device. For more information, see the relevant operating system and SCSI card documentation.

 

Backing up data

About backup methods and types

This section provides a brief description of the available backup methods and types.

The Plug‑in for SnapMirror to Tape supports the following backup methods:

Standard Backup: This method can be used to perform Full or Level 0 backups of the selected volumes. The Standard Backup method is the only method available with Data ONTAP versions older than 8.1.1 and Plug‑in for SnapMirror to Tape versions older than 7.6.x.
Block Level Incremental (BLI) Backup: This method can be used to perform Full, Incremental, and Differential Backups of the selected volumes. The BLI Backup method uses snapshots to perform backups. A Full Backup initializes a backup context against which the plug-in performs Incremental and Differential Backups of the selected volumes.

The BLI method supports the following backup types:

Full Backup: A Full Backup provides a backup of the entire volume. These backups serve as the base backups for subsequent Incremental and Differential Backups.
Incremental Backup: An Incremental Backup provides a backup of the changes in a volume since the last Full, Differential, or Incremental Backup. Incremental Backups consume minimum storage space and are quicker to perform. However, data recovery can take more time depending on the number of savesets that the plug-in is required to restore.
Differential Backup: A Differential Backup provides a backup of the changes in a volume since the last Full Backup. Differential Backups speed up recovery since the plug-in is required to restore only two savesets. However, these backups consume more storage space and take more time to complete than the Incremental Backups. Differential Backups duplicate the data backed up by previous backups of the same type.
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