You can create user-defined subclients to manage and back up specific data.
Prerequisites
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Mount the Lustre file system with the flock option.
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Enable the user_xattr option for user extended attributes.
Procedure
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From the CommCell Browser, expand Client Computers > pseudo-client > Big Data Apps.
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Right-click the instance that you want to create a subclient for, point to All Tasks, and then click New Subclient.
The Subclient Properties dialog box appears.
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Specify the basic settings for the subclient:
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In the Subclient Name box, type a name.
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On the Data Access Nodes tab, select the data access nodes that you want to add to the subclient, and then click Add.
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On the Content tab, click Browse to select the directory or file that you want to back up, and then click Add.
Note
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The default subclient does not back up the content that you specify in user-defined subclients which are within the same instance.
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Subclient content paths can only be Lustre mount points. You can configure only one Lustre mount point for a subclient.
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Nested Lustre volumes are not allowed.
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Click Advanced.
The Advanced Subclient Properties dialog box appears.
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On the Performance tab, specify the number of data streams:
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In the Number of Data Readers box, enter the number of data streams.
Tip: For optimal sharing of the backup load, the number of data readers must be equal or greater than the number of data access nodes.
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Select the Allow multiple data readers within a drive or mount point check box
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Click OK.
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On the Storage Device tab, select a storage policy from the Storage Policy list.
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To create a new storage policy, click Create Storage Policy and follow the instructions in the storage policy creation wizard.
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To perform LAN-free backup and restores, select a grid storage policy.
For more information, see GridStor® (Alternate Data Paths) - Overview.
By configuring keyless SSH between the MDT server and the data access nodes, you can also use the MediaAgent as a data access node.
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Optional: Select the subclient options.
Configuring Backups for Recently Modified or Changed Data
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To enable backups for recently modified or changed data, see Enabling Backups for Recently Modified or Changed Data.
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On the Content tab:
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Select the Only Backup files created or modified on and after check box.
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In the TimeZone box, select the time zone.
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In the Date box, type or select the date after which the data modified or changed has to be backed up.
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Retaining Additional Versions of a File During Synthetic Full Jobs
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On the Retention tab, in Older file versions area, select one of the following options:
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Keep older versions for n years n months, and n days
Type a value for the time period for which you want to retain the older versions of the file. All older versions whose modified time is less than the value you specify in the Keep older versions for boxare retained by the synthetic full backup operation.You will see this option only if your client is configured to use Indexing V2.
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Keep n versions
Type a value for the number of older versions you want to retain, starting from the latest backup.
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Setting Up Pre-processes and Post-processes
Important: The pre-process and post-process scripts must be present on the master node.
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On the Pre/Post Process tab:
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In the PreBackup Process box, type the full path name for the script.
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In the PostBackup Process box, type the full path name for the script.
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To run the post backup process regardless of the job's outcome, select the Run Post Process for all attempts check box.
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Setting Up Network Bandwidth Throttling for a Subclient
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On the Storage Device tab:
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On the Data Transfer Option sub-tab, select the Throttle Network Bandwidth (MB/HR) check box, and then enter the throughput limit.
The Commvault software throttles the transfer on a per-network-agent basis.
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Modifying Software Compression on a Subclient
If the subclient is associated to a subclient policy, modify the compression settings on a subclient policy.
For database agents, where third-party backups are run, the software compression settings must be modified in the Instance Properties dialog box.
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On the Storage Device tab:
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On the Data Transfer Option sub-tab, under Software Compression, configure the appropriate compression settings:
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To compress data on the client, click On Client.
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To compress data on the MediaAgent, click On MediaAgent.
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To compress data according to the settings in the storage policy copy, click Using Storage Policy Settings.
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To transfer data without compression, click Off.
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Viewing Data Paths
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On the Storage Device tab:
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In the Storage Policy list, click a storage policy name.
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Click Data Paths.
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Configuring Activity Control
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On the Activity Control tab
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Select or clear check boxes to enable or disable activities.
For a list of activities that you can control in the CommCell, see List of CommCell Activities.
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Configuring Data Encryption
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Verify that you have encryption enabled on client level. For instructions, see Configuring Data Encryption on a Client.
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On the Encryption tab, choose one of the following options for data encryption:
Options
Description
None
Disables encryption on selected subclient.
Media Only (MediaAgent Side)
Backup data is transmitted without encryption and then encrypted prior to storage. During restore operation, data is decrypted by the client.
Network and Media (Agent Side)
When enabled, backup data is encrypted before transmission and is stored encrypted on the media. During restore operations, data is decrypted by the client.
This is the default option.
Network Only (Agent Encrypts, MediaAgent Decrypts)
Backup data is encrypted for transmission and then decrypted prior to storage on the media. During restore operations, data is encrypted by the MediaAgent and then decrypted in the client.
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Click OK.
A subclient with the content that you want to back up is created under the instance that you selected.