Centera Clusters - Advanced

Table of Contents

View or Modify the Properties of a Centera Disk Library

To view the properties and modify the library name, low watermark, and the status of a Centera disk library:

  1. From the CommCell Browser, select Storage Resources | Library.
  2. Right-click the <Centera Disk Library> associated with the library and then click Properties.
  3. In the General tab, you can modify the library name, low watermark, and the status of a Centera disk library

    The access path and the space information are displayed.

View the Space and Access Path Information for a Centera Disk Library

You can view the configuration and space information associated with a Centera disk library. In addition, you can also view the properties and modify the maximum number of readers, maximum number of writers, and the status of a mount path from the CommCell Console.

To view the space and Access Path Information for a Centera disk library:

  1. From the CommCell Browser, select Storage Resources | Library | <Centera Disk Library>.
  2. Right-click the mount path associated with the library and then click Properties.
  3. Click the Centera Info tab.

    The access path and the space information are displayed.

View the Contents of a Mount Path

You can view the contents of a specific mount path. This feature can be used to view a list of backup operations residing in the mount path. All of the details that are associated with the backup operations that are available in the media are displayed. This includes the following:

  • The Job ID and the status associated with the backup operation
  • Names of the client, agent, instance/backup set and subclient
  • Whether the backup operation is Full, Incremental, Differential or Synthetic full
  • The archive file type
  • The day and time in which the archive file associated with the backup operation was created.
  1. From the CommCell Browser, expand to Storage Resources | Libraries | <Library>.
  2. Right-click the appropriate mount path, and then click View Contents.

    The Data on Media dialog box displays the details of jobs available in the media.

Delete the Contents of a Mount Path

The delete contents option can be used to logically delete the contents of a mount path. This operation deletes the data from the CommServe database. This operation does not make the disk space in the mount path available. A Data Aging operation must be run afterwards to make the disk space available. 

This option can be used to make media available in order to complete an important data protection job when there is no free space available in the library. The Delete Contents operation is recorded in the Audit Trail.

Use Extreme caution when you use this option. Once the contents of the mount path are deleted, they are not available for data recovery operations.

  1. From the CommCell Browser, expand to Storage Resources | Libraries | <Library>.
  2. Right-click the appropriate mount path, and then click Delete Contents.

    A warning message appears.

  3. Do either of the following:
    • Click Yes in the Warning prompt to continue.
    • Click No to stop the operation.
  4. In the Enter Confirmation text dialog box, type erase and reuse media.
  5. Click OK.

Migrate Disk Libraries

You can migrate a Centera disk library to another MediaAgent within the CommCell. Migrating the disk library updates:

  • The source MediaAgent name to target MediaAgent name in the CommServe database.
  • The data paths configured on the Storage Policies.

To perform a disk library migration from one MediaAgent to another MediaAgent:

  1. Before performing disk library migration, make sure that the target MediaAgent has access to the same mount path as the source MediaAgent.

    Therefore, we recommend you to create the target MediaAgent using mirroring. Mirroring allows one MediaAgent to be set up identically as another MediaAgent.

    If mirroring is not an option, the user must have mount paths that are accessible to the target MediaAgent. After migration, ensure that all mount paths are online or accessible.

    • If the mount path is configured as UNC path, make sure that the target MediaAgent is able to access the UNC path.
    • If the mount path is configured on local drive of the source MediaAgent, then after migration make sure to copy the <Mount_Path> folder (including its contents CV_Magnetic folder etc.,) from the source MediaAgent to new target MediaAgent.
  2. From the CommCell Browser, navigate to Storage Resources | Libraries.
  3. Right-click the Centera disk library that you want to migrate to another MediaAgent and then click Migrate Disk Library.
  4. A message appears, that asks you to migrate the disk library to another MediaAgent.

    Click OK.

  5. From the Select the MediaAgent to migrate to list, select the target MediaAgent, and then click OK.

    The Centera disk library will now be associated with the selected MediaAgent.

  6. Make sure that the mount path associated with the disk library, points to valid path. If the mount path was configured as:
    • UNC path, make sure the target MediaAgent is able to access the UNC path.
    • Local drive, make sure to copy the <MountPath> folder (including its contents CV_MAGNETIC etc.,) from the source MediaAgent to new target MediaAgent.
  7. To verify successful migration, perform the following:
    • Right-click on the Centera disk library where you want to view the properties and then click Properties.

      The new target MediaAgent name is displayed on the General tab.

    • Perform backup and restore operations from migrated library.

      Backup and restore operations must be successful.

Remove Centera Cluster Information

To remove the Centera cluster information:

  1. On the ribbon in the CommCell Console, click the Storage tab, and then click Library and Drive.

  2. Under Available MediaAgents, select the MediaAgents that are attached to the library and on which the library needs to be configured and then click Add >>.

    Click OK.

    • To configure any shared library, make sure that you select all of the MediaAgents that share the library.
    • If a device has already been configured for the MediaAgent, the device appears in the Library and Drive Configuration dialog box.
    • For cluster, select the cluster server as the MediaAgent.

  3. If a library is not configured, a message appears that asks you to configure the library. Click OK.

    If a library is already configured, this message does not appear. Subsequently, the detected devices are displayed with the detection status detect success in the Library and Drive Configuration dialog box.

  4. From the Library and Drive Configuration dialog box, click the Start, point to Centera and then select Cluster.
  5. From the Centera Cluster List dialog box, select the Centera cluster you wish to remove and then click on Remove Cluster.

    A Confirm message appears, that asks you to confirm the deletion of the Centera cluster.

  6. Click Yes. The Centera cluster is removed.

Deconfigure a Centera Disk Library

To deconfigure a Centera disk library:

Before you Begin

  • Be certain that the library that you want to remove is not in use. Use the Job Controller to find and kill any jobs that use the library.
  • Make sure that every storage policy copy associated with the library has been deleted. Determine the storage policies accessing the library as described in View the Storage Policies Accessing a Library.

Data associated with a library will be lost, when it is deconfigured.

  1. On the ribbon in the CommCell Console, click the Storage tab, and then click Library and Drive.

  2. Under Available MediaAgents, select the MediaAgents that are attached to the library and on which the library needs to be configured and then click Add >>.

    Click OK.

    • To configure any shared library, make sure that you select all of the MediaAgents that share the library.
    • If a device has already been configured for the MediaAgent, the device appears in the Library and Drive Configuration dialog box.
    • For cluster, select the cluster server as the MediaAgent.

  3. Right-click the Centera disk library that you want to deconfigure, and then click Deconfigure.
  4. A message appears, reminding you that the library's storage policy copies must be deleted in order for the library to be deconfigured.

    If no storage policy copies are associated with the library and you want to deconfigure, click Yes.

    The Centera disk library is removed from the Library and Drive Configuration dialog box.

Data Aging on Centera Clusters

Consider the retention rules established in the Centera Cluster, when you set the rules for data aging on Storage Policy Copies that write data to a Centera Cluster. Retention rules should be configured based on the retention rules established in Centera as follows:
  • Standard read-write access on Centera -  retention rules for data aging on Storage Policy Copies will take effect.
  • Worm or Compliance mode - recommended that the retention ruled for data aging on Storage policies be set to prune later than the pruning on Centera.
  • Compliance Plus mode on Centera - recommended that the retention rules for data aging on Storage Policy Copies be set to "infinite".

This software supports all these modes by setting the retention property on each data object when submitting a Cclip which is used to register the data with Centera for storage. The Cclip reflects a retention date that is based on the number of retention days on the Storage Policy Copy Properties. Once the date is set on the Cclip, changing the Storage Policy Copy to a shorter retention will not change the existing Cclips and attempts to prune the data on the device will be denied until it is aged based on the Cclip value. For information on Cclips and setting-up the data retention on Centera Clusters, refer to the Centera documentation.

Support

Once configured, the Centera library supports all the operations supported by a disk library. Note that Centera is supported as a regular library; shared library configurations are not supported.

License Requirement

You can use one of the following license based on the license bundles:

Traditional License

Feature License Type License Consumption
Centera Clusters Centera Mount Path 1 license per Library

Converting Evaluation Licenses to Permanent Licenses

If you installed the software using an Evaluation License, you can upgrade to a Permanent License as follows:

  1. From the CommCell Browser, right-click the CommServe icon, click Tools tab from the ribbon, and then click License Administration.
  2. From the License Administration dialog box, click Update License tab.
  3. Check the box that corresponds to the evaluation license you would like to upgrade and then click Convert.

The license information is updated in the License Administration window.

Using Capacity-Based Licensing

License Usage by Capacity is a licensing mechanism that allows you to obtain licenses based on the amount of data you back up. It provides the following features:

  • Flexibility of usage on all agents, rather than being tied to number of server, agents, etc.
  • Allows you to purchase licenses based on your data protection needs

Both Core and Enterprise license types are available. Refer to License Usage by Capacity for comprehensive information on utilizing this method.

Releasing a License

If you no longer require a license on a computer, such as cases where the computer is being retired, you can release the license and use it later for another computer. Backup data from the retired computer can still be restored after the license is released provided the data is not aged.

  1. From the CommCell Browser, select Storage Resources | MediaAgent.
  2. Right-click the MediaAgent from which you want to release a license, and then click Release License for MediaAgent.
  3. From the Licenses Consumed list, select Centera Mount Path, and then click Add >.

    The license that you selected is moved to the Licenses to Release list.

  4. Click OK to continue releasing the license.
  5. The Confirm message appears, that asks if you want to continue. Click Yes to release the license.