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NOTE: In a cluster environment, you may require the Disk Signature information during a System State restore if the shared cluster disks are changed after a backup. The Disk Signature information can be obtained using the Windows “dumpcfg.exe” utility. For more information about this tool, consult the relevant Windows documentation. |
The NetVault Backup Plug‑in for FileSystem can be configured to perform multistream operations when you are backing up large amounts of data. Multistream backups improve backup performance by using parallel streams to transfer data.
You can use the multistream options to do the following:
The following are some example backup sequences to offer you guidelines:
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Full Backups only: You can choose to perform only Full Backups if the backup size is small, backup window is not an issue, or storage media is not a constraint. In such scenarios, you can schedule Full Backups every night or every N hours depending on the frequency of updates. |
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Full and Incremental Backups: For quicker backups and minimum use of storage media, you can include Full and Incremental Backups in your strategy. For example, you can schedule Full Backups every Sunday and Incremental Backups every day or every N hours depending on the frequency of updates. |
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Full and Differential Backups: For quicker restores and reduced media usage, you can include Full and Differential Backups in your strategy. For example, you can schedule Full Backups every Sunday and Differential Backups every day or every N hours depending on the frequency of updates. |
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Windows System State Backups: For System State backups on Windows, you can choose either of the following strategies: |
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Policy-based backups: At the enterprise-level, you can create a policy to back up the root directory on Linux and UNIX clients and all fixed drives and System State on Windows clients. For more information about backup policies, see the Quest NetVault Backup Administrator’s Guide. |
1 |
In the Navigation pane, click Create Backup Job to start the configuration wizard. |
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In Job Name, type a name for the job. Assign a descriptive name that allows you to easily identify the job for monitoring its progress or restoring data. |
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In the Selections list, select an existing Backup Selection Set, or complete the following steps to create a set: |
a |
b |
Open the NetVault Backup machine, and then open File System. |
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Back up entire system: On Linux and UNIX systems, select the root node (“/”). |
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Back up individual items: Open the parent node. Browse through the directory tree, and locate the items that you want to back up. |
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Exclude child items: To exclude a file or directory within a selected parent node, click the corresponding check box to replace the check mark with a cross. |
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Click Save, and in the Create New Set dialog box, type a name for the set. Click Save to close the dialog box. |
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In the Plugin Options list, select an existing Backup Options Set, or complete the following steps to create a set. |
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Under Backup Method, select the applicable option:
For more information about backup methods, see About backup methods. | |||||
Under Backup Type, select the Full option. For more information about backup types, see About backup types. |
This option is selected by default. To copy the selected data from snapshots to a storage device, select this check box. | |||||
To retain persistent snapshots on disk arrays, select this check box.
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The Discard After option can be used to delete persistent snapshots from Disk Array after a specified period. This option is only available when you use persistent snapshots to perform backups to a storage device and retain the snapshot as backup on the disk array (that is, the backup uses Retain Snapshot as Persistent option). Otherwise, it expires as per retention policy selected while creating a snapshot. | |||||
This option is available only if Backup Files to Storage and Retain Snapshot as Persistent is selected. |
You can use this option to perform multistream backups. For more information, see “About multistream backups.” You can also configure the plug-in to create separate selection groups for a single volume and use multiple streams to back up the data. For more information, see Use Heuristics for large Single Volume backups. You can specify the maximum concurrent streams on a per-job basis. The Maximum Concurrent Streams setting determines the number of selection groups that are backed up simultaneously. | |
The value configured for the Maximum Concurrent Streams option determines the number of child processes that are started concurrently on the client. For example, if there are six selection groups, and this option is set to 4, four child processes are started on the client. After acquiring the backup device and media, a child process generates a backup stream to back up the items within the selection group. When a child process completes its task, another child process is then started to back up the next selection group. This process continues until all selection groups are backed up. | |
The criteria used to determine the selection groups include the following: | |
You can use this option with the Use Heuristics for large Single Volume backups option. |
f |
Click Save, and in the Create New Set dialog box, type a name for the set. Click Save to close the dialog box. |
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Select or create the Schedule Set, Target Set, and Advanced Options Set. For more information about these sets, see the Quest NetVault Backup Administrator’s Guide. |
NOTE: When performing multi-stream backups, do not select the Ensure backup is the first on the target media check box. If you select this check box for multi-stream backups, each data stream targets a separate piece of media to exist as the first backup on the media item. Thus, if a backup generates five streams, the job tries to obtain five blank or new media items.
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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. |
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