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Druva Documentation

Enabling Long Term Retention

Phoenix Editions: File:/cross.png Business File:/cross.png Enterprise File:/tick.png Elite

The availability of this feature is limited based on the license type, region, and other criteria. To access this feature, contact your Druva Account Manager or Druva Support. This article/documentation is subject to change based on the continuous improvements to this feature.

The Enable Long Term Retention (LTR) option is available only for the backup policies with the LTR-eligible retention period.

Note: In the case of Hyper-V and VMware, when you enable LTR for a backup policy, the file-level restore on cold snapshots is not supported.

Suppose you have enabled the LTR on a backup policy, and based on this backup policy, your data is moved to the cold tier. Upon disabling LTR, data will stop getting transferred to the cold tier. However, your existing data in the cold tier will remain in the cold tier until it expires.

This article describes the procedure to enable Long Term Retention (LTR), monitor your savings via LTR, and restore the cold snapshots from the cold tier. You will also find information on the deletion of cold snapshots and the early delete fees. We recommend that you read About Long Term Retention before proceeding to read this article.

Let's begin.

Verify the retention period

To begin with, examine if the retention period you’ve set in your backup policy qualifies for LTR. 

One year retention period

To enable LTR, you need at least one year of retention for any snapshot. Examples of retention periods that are eligible for LTR are as follows.
Enable_LTR_valid_retention.png

However, the following is not a valid retention period:

Enable_LTR_invalid_retention.png

Based on your retention, whether or not your backup policy is eligible for LTR can be seen on the Create New Backup Policy page. 
The following screenshot shows that the Enable Long Term Retention (LTR) option is disabled for this backup policy as the retention period is less than one year.

Enable_LTR_Edit_retention.png

However, if your retention period is greater than or equal to one year, you are eligible to enable LTR as shown in the following screenshot:

Enable_LTR_option.png

Daily snapshots threshold

To enable LTR, ensure that the daily snapshots days must be less than the Warm snapshot threshold that you select.
The following screenshot shows that the daily snapshot limit exceeds the warm snapshot threshold.
Enable_LTR_Daily_snapshot_threshold.png

Backup policy as template

When creating a new backup policy for Windows/Linux Servers and NAS workloads, you can use an existing backup policy as a template. All your existing settings are automatically added to the new backup policy. You can save time and reduce errors in creating a new backup policy.


Enable_LTR_Backup_policy_template.png

Note: You cannot use your old backup policies as a template where the daily retention period exceeds the warm snapshot threshold. In the new LTR V2 the daily retention period must be less than the Warm Snapshot threshold.

Enable_LTR_Backup_policy_template_error.png

Enable LTR

You can enable LTR either when creating a new backup policy or when editing an existing backup policy later.

Note: Long Term Retention (LTR) is not available for Druva Phoenix Gov cloud and AWS Marketplace customers.

Enable LTR when creating a new backup policy

  1. On the Backup Policies page, click Create New Backup Policy and select a required workload.
    Enable_LTR_New_Backup_policy.png
  2. Specify the Name and Description of the backup policy.
  3. Click Next and specify the backup schedule.
  4. Click Next to specify the retention details.
  5. In the Retain section, toggle the Enable Long Term Retention(LTR) option.
    Enable_LTR_Retention_Enable_LTR.png
  6. Select the number of days (Warm snapshots threshold) to keep the snapshot in the warm tier. 
    Enable_LTR_Retention_Keep_Snapshots.png
    Note: Ensure that the warm snapshots threshold that you select is greater than the number of days specified in the Daily Snapshots for field.
    For additional scenarios about increasing and decreasing the warm snapshot threshold, see Impact of changing threshold on existing snapshots and Frequently Asked Questions (FAQs) sections.
  7. Click Next and then click Finish.

Enable LTR by editing an existing backup policy

Note: Any change in retention will apply to all existing and new snapshots.

  1. On the Backup Policies page, click the backup policy name in the Policy Name column.
  2. On the Summary page, in the Retention section, click Edit.
    Enable_LTR_Retention_Edit.png
  3. In the Edit Retention dialog, toggle the Enable Long Term Retention (LTR) option.
    Enable_LTR_Retention_Enable_LTR.png
  4. Select the number of days to keep the snapshot in the warm tier and click Save
    Enable_LTR_Retention_Keep_Snapshots.png

On the backup policy details page, you can see the status of LTR as shown in the following screenshots:

  • LTR disabled:
    Enable_LTR_LTR_Disabled.png
  • LTR enabled:

Note: When LTR is enabled, you can also view the number of days selected for retaining the snapshot in the warm tier.

Enable_LTR_LTR_Enabled.png

On the Backup Policies page, the LTR column displays the current status of LTR whether it is enabled or disabled for each backup policy.

Enable_LTR_Backup_Policy_LTR_column.png

Note: In the case of Hyper-V and VMware, when LTR is enabled for a backup policy, file-level restore on cold snapshots is not supported.

Impact of changing threshold on existing snapshots

Increasing the threshold

You can change the number of days to keep snapshots in the warm tier from 15 to 30, 45, or 60 days.
For example, if the current setting is to keep snapshots in the warm tier for 15 days, all snapshots older than 15 days will move from warm to cold tier.
After you increase the threshold from 15 days to 45 days, the snapshots which are already in the cold tier will remain there. However, snapshots that are older than 45 days will now move to the cold tier.

Note: If the threshold is increased for an existing backup, then a warning is displayed that increasing the threshold for existing backup sets will increase the credit consumption.

Decreasing the threshold

You can change the number of days to keep snapshots in the warm tier from 60 days to 15, 30, or 45 days.
Before changing the set threshold, all snapshots not older than 60 days will remain in the warm tier. 
However, after you decrease the threshold from 60 days to 30 days, all snapshots that were created 30 days ago will be moved to the cold tier. In addition, eligible snapshots based on the new threshold, will now be migrated to the cold tier after 30 days.

Note: If the threshold is decreased for an existing backup, then a warning is displayed that decreasing the threshold will have only XX days of warm snapshots.

Monitor your savings

Once LTR is enabled, you can access the following page to monitor your credit savings that you have made by enabling LTR for your backup policy.

Dashboard

On the menu bar, click Phoenix to access the Druva Phoenix Dashboard. On the Dashboard, navigate to the Backup Data section to view the LTR savings for one year and the split of LTR and non-LTR data.

Enable_LTR_Dashboard.png

Storage page

On the menu bar, click Storage to access the Storage page. On this page, you can view the split of LTR and non-LTR data, which is the amount of data in the cold and warm tiers, respectively.

Enable_LTR_Storage_page.png

Reports page

On the menu bar, click Reports to access the Reports page. On the Manage Reports page, click the report link to view the report with the corresponding details.

Enable_LTR_Reports_page.png

Credit Consumption report

On the Druva Phoenix Credit Consumption Report page, check the credit saving summary to view the details of your LTR savings. 

Enable_LTR_Credit Consumption report.png

You can also view the credit consumption summary of Phoenix credits consumed over a certain period.

Storage Consumption by Backup Sets report

On the Storage Consumption by Backup Sets report, you can view the LTR status and the warm tier retention threshold for each backup set. 
The LTR Status displays Enabled or Disabled based on whether the LTR is enabled or not. 
The Warm Tier Retention Threshold column displays the number of days for the backup set where LTR is enabled and a dash for the backup set where LTR is disabled.

Enable_LTR_Storage Consumption by Backup Sets report.png

Audit Trails page

You can view the LTR status and the warm tier retention threshold details in the audit trails for creating a backup policy, deleting a backup policy, and updating a backup policy.
On the menu bar, click Manage > Audit Trails to access the Audit Trails page. 

Enable_LTR_Audit Trails page.png

On the Audit Trails page, select a backup policy action (create, update, or delete) in the list and click View Details.
The Action Details dialog box displays the details of current LTR status and warm tier retention threshold days where the LTR is enabled.

Backup Policy - Create - Enabled

The backup policy is created with LTR enabled.

Enable_LTR_Backup Policy - Create - Enabled.png

Backup Policy - Update - Enabled

The backup policy where LTR was disabled earlier is updated with LTR enabled.

Enable_LTR_Backup Policy - Update - Enabled.png

Backup Policy - Update - Disabled

The backup policy where LTR was enabled earlier is updated with LTR disabled.

Enable_LTR_Backup Policy - Update - Disabled.png

Note:

  • In a backup policy if LTR is disabled, the Keep snapshots in warm tier field is not visible in the audit trail.
  • For a non-LTR customer, the LTR option is unavailable in the Backup policy configuration. Therefore, both LTR and Keep snapshots in warm tier fields are not visible in the audit trail.

Restore data from cold tier

At the time of restoration, data from the cold tier is retrieved, moved temporarily to the warm tier, and then restored. Once you initiate the restoration process, the data retrieval from the cold tier and its restore from the warm happen automatically. Warmed-up data is deleted from the warm tier after 10 days.

To  restore the data from the cold tier (VMware as an example), perform the following steps:

  1. On the Phoenix Management Console menu bar, click All Organizations, and then select the required organization from the drop-down list.

  2. On the Phoenix Management Console menu bar, click Protect > VMware. A list of all the registered VMware vCenter Servers and ESXi Hypervisors appears.
    All vcenters esxi hosts.png

  3. In the vCenter/Hypervisor column, click the virtual machine. 

  4. In the left pane, click the Configured VMs tab.

  5. In the Virtual Machines column, select the virtual machine for which you want to restore the cold snapshots.
    configure VMs.png

  6. Click Restore > VM Restore The Restore Data window appears.
    Restore data window.png

  7. Select the restore type as Disk Restore or Full VM restore.

  8. Click the timestamp drop-down list and select the snapshot that you want to restore.
    timestamp.png

  9. For the Data Restore option, select the required virtual disk that you want to restore and click Restore

  10. For the Full VM Restore option, click Proceed to Restore.

Frequently Asked Questions (FAQs)

After increasing the threshold to keep snapshots in the warm tier, will the cold snapshots be converted to warm snapshots? 
No. They will remain as cold snapshots, even though the threshold is increased.


After reducing the threshold to keep the snapshots in the warm tier, will more snapshots be converted to cold? 
Yes. If snapshots are older than the set threshold, then they are eligible for the cold tier migration.

 

 

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