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

Device handling guidelines

To use both Dump and Image Backup methods, you must add the server in the Dump Mode as well as the Image Mode. This poses a challenge since each server displays a separate and distinct iteration of any given devices attached to the environment. The general guidelines are to use the device path that is either used most frequently based on the backup type or the device path that best serves the data set size and infrastructure performance capacity.
Alternatively, you can use the D2D licensing to dynamically switch between the server and the backup methods.

Backing up data

•
About Backup Dump Levels
•
Backing up data using the Dump Backup method
•
Backing up data using the Image Backup method
•
Backing up individual data paths using the Dump Backup method
•
Backing up individual data paths using the Image Backup method

About Backup Dump Levels

The Plug‑in for NDMP supports both Full and Incremental Backups. The backup type is determined by the Dump Level that can be set to Level 0 for a Full Backup or Levels 1 through 9 for Incremental Backups:
•
Level 0 or Full Backup: A Full Backup provides a backup of all the data in the selected path.
•
Level 1 through 9 or Incremental Backup: The Incremental Backups base themselves on the most recent lower‑level Incremental Backup, and include any data that has changed or is new since the last Full or Incremental Backup.
Examples:
•
Level 1 Incremental Backup includes any data that has changed or is new since the last Level 0 or Full Backup.
•
Level 2 Incremental Backup includes any data that has changed or is new since the last Level 1 Incremental Backup, and so on, up to dump level 9.
Important notes
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If a directory is included in a dump level 0 backup, it is included in all future dumps even if no changes have occurred. In this instance, the directory is empty and does not contain content. However, it does not negatively affect the recovery of data.
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Only one dump level is maintained for each selected set of data. For example, after performing Level 1, Level 2, and Level 3 Incremental Backups, if you perform a Full Backup, the dump level is reset to 0. The next instance of the Incremental Backup is based on the Full Backup.
•
If an Incremental Backup fails, the subsequent backup is based on the most recent backup of a lower level. For example, if dump level 1 is completed successfully, but dump level 2 fails, dump level 3 is based on dump level 1. The failure of an Incremental Backup is noted in the NetVault Backup logs.

Backing up data using the Dump Backup method

To back up data using the Dump Backup method
1
In the Navigation pane, click Create Backup Job.
— or —
In the Navigation pane, click Guided Configuration, and then on the NetVault Configuration Wizard page, click Create Backup Jobs.
2
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 or restoring data. 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.
3
In the Selections list, select an existing Backup Selection Set, or complete the following steps to create a set.
a
Click Create New next to the Selections list.
b
On the NetVault Backup Selections page, open the NetVault Backup Server, and then open NDMP Client.
c
In the list of added servers, open the applicable filer to display the Volumes node.
d
Select the data that you want to back up:
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Back up all volumes: Select the Volumes node.
•
Back up individual volumes: Open the Volumes node, and select the volumes that you want to back up.
e
Click Save, and in the Create New Set dialog box, type a name for the set. Click Save to close the dialog box.
 
 
*NOTE: A set name can contain alphanumeric and non-alphanumeric characters, but it cannot contain non‑Latin characters. On Linux® OS, the names can have a maximum of 200 characters. On Windows® OS, there is no length restriction. However, a maximum of 40 characters is recommended on all platforms.
4
In the Plugin Options list, select an existing Backup Options Set, or complete the following steps to create a set.
a
Click Create New next to the Plugin Options list.
b
Under NDMP Backup Options, configure the following settings.
 
Table 1. NDMP Backup Options
Option
Description
Dump Level
Select the type of backup that you want to perform. For a Full Backup, type or select 0. For an Incremental Backup, type or select any level from 1 to 9, based on the previous dump level.
Update /etc/dumpdates
The file “/etc/dumpdates” keeps a record of the backup, including the backup name, backup level, and snapshot time.
Leave this check box selected if your backup strategy includes Incremental Backups. The information in this file is used to determine what data must be included in an Incremental Backup.
Save File Information
This option allows you to browse individual files and directories while selecting data during restore. You cannot restore individual files and directories if you clear this check box.
We recommend that you leave this check box selected.
File History Character Set
If the names of files or directories contain non-ASCII characters, specify the character set encoding to allow correct display of the names on the NetVault WebUI. The plug-in supports UTF-8 and ISO8859 character sets.
Exclude
Use this option to specify files and directories that you want to exclude from the backup. Type the complete file path, starting with a forward slash (“/”). If the full path is not provided, the plug-in excludes any item that matches the entry. To separate multiple items, use a comma.
You can use up to two wildcard characters per file. Wildcard characters can only be used at the first or the last place in the filename. For example, if you enter “/dir1/tmp*, *.o” in Exclude, the plug-in excludes the following items:
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Files and directories starting with the letters “tmp” in the directory /dir1.
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All files and directories with the extension “.o”.
Filenames are case-sensitive for NFS shares and case-insensitive for CIFS shares.
c
Under Sub Jobs, configure the following settings.
 
Table 2. Sub Jobs
Option
Description
Number of Backups to Run in Parallel
Type or select the number of jobs that can run concurrently. The default value is zero. With the default setting, all jobs in parallel, limited only by the availability of drives, network bandwidth, and other resources.
To achieve the desired result, set the same value for each job.
Delete Auto Generated Backup Jobs on Completion
By default, each subjob is listed on the Job Status page. This can create confusion when you try to view the details of the parent job. To include only a single entry for the parent job, leave this check box selected.
d
Click Save, and in the Create New Set dialog box, type a name for the set. Click Save to close the dialog box.
5
Select or create the Schedule Set, Target Set, and Advanced Options Set. For more information about these sets, see the Dell NetVault Backup Administrator’s Guide.
6
To submit the job for scheduling, click Save & Submit. You can monitor the job progress from the Job Status page and view the logs from the View Logs page.
To save the job definition without scheduling it, click Save. You can view, edit, or run this job from the Manage Job Definitions page. This job is not displayed on the Job Status page until you submit it.
For more information about Job Status, View Logs, and Manage Job Definitions, see the Dell NetVault Backup Administrator’s Guide.
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