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NetVault Plug-in for NDMP 10.0.5 - Application Notes for EMC NAS

Restoring data using the plug-in

To restore data using the plug-in
1
In the Navigation pane, click Create Restore Job.
2
In the saveset table, select the saveset that you want to use, and click Next.
The table displays the saveset name (Job Title and Saveset ID), creation date and time, and saveset size. Note the following:
•
The list is sorted alphabetically by saveset name. You can sort the list by a different column or reverse the sort order by clicking the column heading. The arrowhead next to the column name indicates the sort order.
•
You can use one or more filters to display specific savesets on this page. You can also search for a data item in savesets and view the media list for a saveset. For more information about the additional features, see Using additional features available on the Choose Saveset page.
•
When you select a saveset, the following details are displayed in the Saveset Information area: Job ID, Job Title, name of the NetVault Backup Server, name of the client from which the data was backed up, plug‑in used to create the saveset, saveset creation date and time, saveset retirement setting, whether Incremental Backup or not, whether Archive or not, and saveset size.
3
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.
 
 
*IMPORTANT:  
•
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.
•
EMC Celerra/VNX systems do not allow you to restore system files on Linux- and UNIX-based operating systems. The system files include character device files, block device files, FIFO (named pipe files), sockets, doors, and other special files. The restore job might fail if you include these files.
•
EMC Celerra/VNX systems do not support individual file restores on deduplicated volumes. For details, see the EMC guide Configuring NDMP Backups on EMC Celerra/VNX.
4
Click Edit Plugin Options, and configure the following settings.
 
Table 1. 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 DAR mode from the following:
•
Use Direct Access Restore if Possible: Select this option to perform a direct access restore if the backup was direct and the mover and data server can complete a Direct Access Restore. If these conditions are not met, a non-direct access restore is performed.
•
Use Direct Access Restore by Recovering Individual Files: Select this option to restore a directory and its file contents. 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: Select this option to force a Direct Access Restore. 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: Select this option to perform a standard non-Direct Access Restore.
Incremental Restore
Select this check box to recursively extract data and reconstruct the selected subtree to the state it was in at the time of backup.
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
Select this option to restore ACLs from the backed-up file. 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 a Direct Access Restore, their parent-level directory permissions are not restored.
•
When running a Direct Access Restore, 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. Accordingly, multiple log entries are displayed for the job.
5
Click OK to save the settings, and then click Next.
6
In Job Name, specify a name for the job.
Assign a descriptive name that allows you to easily identify the job for monitoring its progress. The job name can contain alphanumeric and non-alphanumeric characters, but it cannot contain non-Latin characters. There is no length restriction. However, a maximum of 40 characters is recommended on all platforms
7
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 Dell NetVault Backup Administrator’s Guide.
9
Click Submit to submit the job for scheduling.
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 Dell NetVault Backup Administrator’s Guide.

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.
To restore an Incremental Backup
1
Restore the Full or Level 0 Backup. For more information, see Restoring data using the plug-in.
2
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 the section 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 steps 1 through 3 in the section 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.
Click OK to close the dialog box.
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.
4
Complete steps 4 through 9 in the section Restoring data using the plug-in.

Restoring data to an alternate filer

To relocate a backup to an alternate filer, use the following procedure. This procedure can be useful during a server migration or disaster recovery operation.
Prerequisites
Before you start the restore procedure, add the target filer to the plug-in. For more information, see the Dell NetVault Backup Plug-in for NDMP User’s Guide.
Restore procedure
To restore data to an alternate filer
1
Complete steps 1 through 3 in the section Restoring data using the plug-in.
2
To rename or relocate data during restore, complete steps 2 and 3 in the section Renaming or relocating data.
3
Click Edit Plugin Options, and configure the following option:
NDMP Server: This option specifies the target filer name. By default, it is set to the name of the original filer from which the data was backed up. To relocate the data to an alternate server, type the name of the target filer.
4
Select the appropriate DAR method. For more information about the available options, see Restore options.
5
Complete steps 5 through 9 in the section Restoring data using the plug-in.
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