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NetVault Plug-in for NDMP 11.4 - Application Notes for NetApp ONTAP

Restoring data using the plug-in

1
In the Navigation pane, click Create Restore Job.
On the Create Restore Job — Choose Saveset page, the saveset table provides a list of available savesets.
The table shows the saveset name (Job Title and Saveset ID), creation date and time, saveset size, and saveset status. The saveset status is indicated using the following icons.
 
Icon
Description

Saveset is online (all segments are online).

Saveset is partially online (some segments are online).

Saveset is offline (all segments are offline).

The saveset list is sorted by creation date (newest to oldest). You can sort the list by one or more columns, as required. The arrowhead next to the column name indicates the sort order.
2
To filter the saveset list, use the following filter options.
 
Filter
Description

Client

Displays savesets created for particular clients. The default selection is Any.

1
To use this filter, click the Client box.
2
In the Choose Client dialog box, select the clients.
3
To close the dialog box, click OK.

Plugin Type

Displays savesets created using a particular plug-in. The default selection is Any.

1
To use this filter, click the Plugin Type box.
2
In the list, select the plug-in.

Date

Displays savesets created during a specified period. The default selection is Any.

1
To use this filter, click the Date box.
2
In the list, select the option that you want to use.
The available options are Last 24 hours, Last Week, Last Month, Last 6 Months, Last Year, and Any.

Job

Displays savesets created for particular jobs. The default selection is Any.

1
To use this filter, click the Job box.
2
In the Choose Job dialog box, select the jobs.
3
To close the dialog box, click OK.
3
Select the saveset that you want to use, and click Next.
When you select a saveset, the following details are displayed in the Saveset Information area: job ID number, job title, tag, server name, client name, plug-in name, saveset date and time, retirement setting, Incremental Backup or not, archive or not, and saveset size.
4
On the Create Selection Set page, select the data that you want to restore:
•
Restore entire saveset: Select the root node.
•
Restore individual files and directories: Select the target files and directories in the selections tree. The selections tree can only be browsed if the Save File Information option was selected during backup.
If the backup contains a single file, the filename is added to the directory path. In the selection tree, it is displayed as /path/to/filename/filename and it is restored in that manner. The file is restored correctly if you select the directory and restore the file.
 
* 
NOTE: While restoring data from a snapshot backup, you must use the Relocate option. If you do not use this option, the restore job fails. The Relocate option allows you to relocate data to the same or a different volume. For more information about relocating data, see Renaming or relocating data.

If you omit child-level items after selecting the parent node, the job fails. To perform selective restores, open the parent node, and select each item that you want to restore.
5
Click Edit Plugin Options, and configure the following settings.
 
Table 4. Restore options
Option
Description

NDMP Server

This option specifies the target filer name. It is only required when you want to restore data to an alternate filer. By default, it is set to the name of the original filer from which the data was backed up. Do not change the NDMP Server while restoring data to the same filer.

Direct Access Restore Mode

Select the appropriate Direct Access Restore (DAR) mode from the following:

•
Use Direct Access Restore if Possible: To perform a direct-access restore if the backup was direct and the mover and data server can complete a direct-access restore, select this option. If these conditions are not met, a nondirect-access restore is performed.
•
Use Direct Access Restore by Recovering Individual Files: To restore a directory and its file contents, select this option. When you use this option, empty directories in the saveset are ignored.
You must select this option if any item was omitted during data selection; otherwise, the restore job fails.
•
Only Do Direct Access Restore: To force a direct-access restore, select this option. It can be only used if the backup was direct and the mover and data server can complete a direct-access restore; otherwise the restore job fails.
•
Never Do Direct Access Restore: To perform a standard nondirect-access restore, select this option.

Incremental Restore

To recursively extract data and reconstruct the selected subtree to the state it was in at the time of backup, select this check box.

This option is equivalent to setting the environment variable EXTRACT=N. The plug-in overwrites the existing files and deletes the files that were not present at the time of backup.

Restore ACLs

To restore ACLs from the backed-up file, select this option. This option is equivalent to setting the environment variable EXTRACT_ACL=Y. You can use this option only if the Backup ACLs option was selected during backup.

 
* 
IMPORTANT:  
•
When individual files are selected for DAR, their parent-level directory permissions are not restored.
•
When running DAR, NetVault Backup organizes the restore requests into groups of 1024 files at a time. When a restore job consists of more than 1024 total files, multiple restore requests are issued. So, multiple log entries are displayed for the job.
6
To save the settings, click OK, and then click Next.
7
In Job Name, specify a name for the job.
Assign a descriptive name that lets you easily identify the job for monitoring its progress. The job name can contain alphanumeric and nonalphanumeric characters, but it cannot contain non-Latin characters. There is no length restriction. However, a maximum of 40 characters is recommended on all platforms
In the Target Client list, the client from which data was backed up is selected by default. Do not change this setting.
8
Select or create the Schedule Set, Restore Source Set, and Advanced Options Set.
For more information about these sets, see the Quest NetVault Backup Administrator’s Guide.
9
To submit the job for scheduling, click Submit.
You can monitor the job progress from the Job Status page and view the logs from the View Logs page. For more information about these functions, see the Quest NetVault Backup Administrator’s Guide.

Additional notes

When restoring data, you may notice one or more of the following entries in the NetVault Backup logs. These messages are routine and do not require any intervention:

•
Mover has paused due to seek outside the supplied window: This entry is displayed as a Background message. BRE backups create a segment on tape for each checkpoint (as configured in Number of Gigabytes Between Checkpoints in the Backup Options Set). This message is displayed after each individual segment is restored and it just indicates the underlying mechanism behind the NDMP operation.
•
Received media request for UID: This entry is displayed as an Information message. It is displayed after each segment is restored as a request is sent to the Media Manager for the media that contains the next segment. This message is displayed even if the next segment resides on the same media.
•
No suitable drive or media for the job — Request held in queue: This entry is displayed as a Warning. It is displayed when the required piece of media is not available or it is in use. If the piece of media being requested is the current one, this message indicates a temporary condition and the restore resumes shortly.

Restoring Incremental Backups

The incremental restores build on each other. To restore an Incremental Backup, you must have all the backups from Level-0 through the last backup in the backup sequence that you want to restore.

1
Restore the Full or Level 0 Backup.
2
For more information, see Restoring data using the plug-in.
3
Restore each Incremental Backup in the backup sequence, starting with the lowest-level backup and going to the last backup that you want to restore (that is, in the same order in which they were created).
For each dump level, follow the steps outlined in Restoring data using the plug-in.
 
* 
IMPORTANT: All NDMP backups are effectively snapshots of the volume. When you restore a dump backup in an increment series, it restores all the data in the saveset. At the same time, it deletes the files present on the filer, but not available in that saveset. Thus, it reconstructs the subtree as it was at the time of backup.

Renaming or relocating data

When restoring a backup, you can rename the directories to create a copy of the data instead of overwriting of the existing versions. You can also relocate the data to a different volume. This procedure can be useful if the original volume is down or if you are dealing with limited bandwidth or capacity.

 
* 
NOTE: This feature is only available to savesets that were created with the Save File Information option.
To rename or relocate data during restore:
1
Complete Step 1 through Step 4 in Restoring data using the plug-in
2
Select the volume that you want to rename, and in the Actions list, click Rename.
3
In the Restore Rename dialog box, configure the following option:
•
To rename a file or directory, type the new name.
•
To relocate the item to a different volume, type the volume name. You can also rename while relocating by specifying a new path. The volume to which you are relocating must exist on the filer.
In NetApp ONTAP 8.1 C-mode, use the following format to specify the new path:
/<vserverName>/<volumeName>/<folderName>
Example:
/vs1/vol4/data/restore
4
To close the dialog box, click OK.
After you close the dialog box, the plug-in updates the corresponding node in the selections tree to display the new name and location for the file or directory.
5
Complete Step 5 through Step 9 in Restoring data using the plug-in.
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