V11 SP8
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Advanced Configuration - Medical Imaging

Table of Contents

Adding Additional Files and Folders for Archiving

By default, the default subclient backs up all the images stored on your computer. You can backup and archive specific images on your computer and even other file types by adding them to a new subclient.

Use the following steps to assign specific files to a subclient:

  1. From the CommCell Browser, navigate to <Client> | File System.

    Right-click the <Backup Set> and then click All Tasks | New Subclient.

  2. Enter a name for the subclient in the Subclient Name box.

  3. Click the Content tab.

    Click Browse and navigate to the folder that contains the images that you want to back up.

    Select the folder and click Add.

    If you want to back up other file types in your system, select the Content Library folder and then select the file group name. For example, if you want to back up all video files, select Video.

    Click Add and then click Close.

  4. Click the Storage Device tab.

    Select the Storage Policy from the drop down list.

    Click OK.

  5. From the CommCell Console, navigate to Client Computers | Client | File System | <Backup Set>.

    Right-click the <Subclient> on the right-pane and then click Backup.

    Select Full as backup type and Immediate to run the job immediately.

    Click OK.

Archiving Rules

Archiving rules specify the criteria for the type of data to be archived. You can configure these rules on a requirement basis.

File System Size

The backed up files can be stubbed based on the available free space on the volume. During a backup job if the free space on the volume is less than this value, files matching the remaining rules will become candidates for stubbing.

  1. From the CommCell Browser, navigate to Client Computers | File System | <Backup Set>.
  2. Right-click the <Subclient> and click Properties.
  3. Click the Disk Cleanup tab.
  1. Enter the low watermark value for the volume in Start cleaning up disk when it is n% Free.
  2. Enter the high watermark value for the volume in Stop cleaning up disk when it is n% Free.
  3. Click OK.

File Access Time

This configuration will stub files based on the last accessed date of each file within the volume or folder/directory. In case it is older than the number of days specified, the files will get stubbed.

  1. From the CommCell Browser, navigate to Client Computers | File System | <Backup Set>.
  2. Right-click the <Subclient> and click Properties.
  3. Click the Disk Cleanup tab.
  1. Enter the number of days elapsed since the file was last accessed in File access time older than n Days.
  2. Click OK.

File Modified Time

This configuration will stub files based on the last modified date of each file within the volume or folder/directory.

  1. From the CommCell Browser, navigate to Client Computers | File System | <Backup Set>.
  2. Right-click the <Subclient> and click Properties.
  3. Click the Disk Cleanup tab.
  1. Enter the number of days elapsed since the file was last modified File modified time older than n Days.
  2. Click OK.

File Creation Time

This configuration will stub files based on the time the files were created within the volume or folder/directory.

  1. From the CommCell Browser, navigate to Client Computers | File System | <Backup Set>.
  2. Right-click the <Subclient> and click Properties.
  3. Click the Disk Cleanup tab.
  1. Enter the number of days elapsed since the file was created File created time older than n days.
  2. Click OK.

File Size

This configuration will stub files based on the file size. If a file size within a scanned volume or folder/directory is in between the two limit values set, it will get stubbed. Follow the steps given below to stub files based on their size:

  1. From the CommCell Browser, navigate to Client Computers | File System | <Backup Set>.
  2. Right-click the <Subclient> and click Properties.
  3. Click the Disk Cleanup tab.
  1. Enter the minimum file size in File size greater than n KB.
  2. Enter the maximum file size in Maximum file size n KB.

    These options can be used individually or in combination to specify a range.

  1. Click OK.

For Example:

To archive files more than 5KB but less than 20KB:

  • Enter 5 KB in File size greater than n KB.
  • Enter 20 KB in Maximum file size n KB.

Setting Up Stub Retention Rules

By default, the files are replaced by stubs after they have been archived and the stubs are deleted immediately. However, you can select to retain the stubs for a defined number of days or keep them forever.

Use the following steps to configure the stub retention options:

  1. From the CommCell Browser, navigate to Client Computers | File System | <Backup Set>.
  2. Right-click the <Subclient> and click Properties.
  3. Click the Disk Cleanup tab.
  1. Type the number of days in the Keep for <n> days box to define the number of days to retain the stubs.

    Optionally you can select Keep forever to retain the stubs forever.

  2. Click OK.

Configuring Archived Data to Reduce Space on Secondary Storage

You can prune archived data and reclaim a secondary storage space based on the stub retention setting and the storage policy cycle (based on retention criteria).

Running a synthetic full backup can reduce space on the secondary storage for deleted stubs that meet the expiration criteria.

Running a Synthetic Full Backup

  1. From the CommCell Browser, navigate to Client Computers | File System | <Backup Set>.
  2. Right-click the Subclient and then click Backup.
  3. From the Backup Options dialog box, select Synthetic Full as the backup type and Immediately as the Job Initiation option.
  4. Click OK.
  5. You can track the progress of the backup job from the Job Controller window.

Running data aging can reclaim space on the secondary storage by pruning the expired backup jobs. The following sections describe two scenarios for space reclamation:

Example 1

By default stub retention is set to 730 days from the Stub Rules tab and the Storage Policy retention is set for 2 cycles and 15 days.

Procedure A

The following procedure demonstrates the reduction in the secondary storage usage:

  • Run a few backup jobs. This will lead to stub generation based on the defined archiving rules.
  • Delete a few stubs.
  • Wait for the deleted stubs to expire (by default 730 days, but this can be manipulated).
  • Run synthetic full backup with Check for Deleted Stub option selected in the advanced tab.
  • From the backup job history, verify the backup file list. Ensure that the deleted stubs and their corresponding data are no longer included in the synthetic full backup image.
  • Note that space on secondary storage has been freed up by pruning of expired stubs and their corresponding data by running a synthetic full backup.

Procedure B

The following procedure demonstrates the reclamation of secondary storage space:
  • Run backup jobs to generate 2 backup cycles.
  • Wait for the last job of the first cycle to expire (based on the Storage Policy retention, which is 15 days by default).
  • Run a Synthetic full backup.
  • Running the synthetic full job will start the third backup cycle and will render the first cycle prune-able. 
  • Run a data aging job. Notice that the secondary storage space occupied by the first backup cycle has been reclaimed. 

Example 2

In order to reclaim space on secondary storage by completely removing the archived data and their stubs follow the steps given below:

Prerequisites

  • Stub retention has been set to n days from Subclient properties Stub Rule tab.
  • Storage Policy retention has been set to x cycles and y days.
  • A few backup cycles have been completed.

Procedure

  1. Change the stub retention to a minimum of 1 day from Subclient properties Stub Rule tab.
  2. Change the storage policy retention setting to 1 cycle and 0 days.
  3. Delete the unwanted stubs.
  4. If no backup jobs are run, the stubs will expire in 1 day after their deletion.
  5. Run synthetic full backup with Check for Deleted Stub option selected in the advanced tab.

    Note that the synthetic full backup image does not backup the deleted stubs and their corresponding data as they have been pruned.

  6. Running the synthetic full backup will start a new backup cycle. Due to the change in storage policy retention, all previous backups expire.
  7. Run a data aging job. All older backups prior to the synthetic full backup will be pruned.

    Note that space on secondary storage has been freed up as all the unwanted stubs and their corresponding data have been pruned. All the previous backups have been pruned.