A LiveClone is an independent clone of an active image that consumes full storage resources and can be mounted to a host. A LiveClone can be refreshed incrementally from another image, allowing fast and efficient data refreshes for extract, transform, and load processes and test and development purposes. A LiveClone can also be mounted for direct modification to support operations such as data masking.
Because a LiveClone can be created in a different snapshot pool to the source image, a LiveClone can consume a different class of storage to the source image. This is useful if you want to simulate workloads on the same class of storage as production data, while leaving the backups on a different class of storage.
LiveClones jobs are commonly run by Backup and DR Workflows and can be used to do the following:
- Refresh: Create multiple, re-mountable copies of an active image that can be refreshed from the most recent image of the same application. See Refresh a LiveClone.
PrepMount: Mount the LiveClone image to a specific host for a pre-processing operation—such as sanitizing data—even if some copies of this same LiveClone may already be mounted. You can prep-mount a LiveClone image to scrub confidential or sensitive data.
PrepUnmount: A prep-unmount operation on a LiveClone lets you decide if your changes are to be preserved or not. By default changes are tracked and preserved.
LiveClones provide a crucial building block in managing copy data lifecycle as they combine the performance and independence of a full clone with the efficiency and speed of incremental refreshes of data.
Create LiveClones
Use these instructions to create a LiveClone of a host.
Click App Manager and select Applications from the drop-down list.
The Applications page opens.
Select the application or VM with the image that you want to clone, then choose Access from the drop-down list at the bottom of the Applications page.
The Access page opens listing backup images in the timeline ramp view. Image types that support LiveClone creation include snapshot and remote snapshot—StreamSnap images. The timeline ramp view is a time-based visualization of seven days of captured images for the selected application. You can use your mouse scroll wheel or the up and down arrows in the bottom left corner of the page to move the timeline through the captured images and make a selection. See Access the timeline ramp view of an image for details.
Select the desired image, then select LiveClone from the list of access operations. The LiveClone page opens.
Select a snapshot storage pool from the Choose Pool drop-down list. If you have multiple pools, each consuming different classes of persistent disk, make sure you select the desired pool.
In Label, enter a unique name for the new LiveClone.
Click Submit. The creation of a LiveClone can take some time depending on the image size. Once completed, you can see the LiveClone image in the Access page. The LiveClone image appears adjacent to the original data in the ramp view of the Access page with a numeric one. Unlike snapshot images which are yellow, LiveClone images are purple.
Direct mount a LiveClone to a host
Direct-mount a LiveClone to present refreshed images to work from. If the LiveClone does not already exist, it is must be created first, see Create LiveClones.
To mount a LiveClone to a host follow these steps:
Click App Manager and select Applications from the drop-down list.
The Applications page opens.
Select the application with the LiveClone image that you want to mount, then choose Access from the drop-down list at the bottom of the Applications page.
The Access page opens listing LiveClone images in the timeline ramp view. Image types that support LiveClone creation include snapshot and remote snapshot—StreamSnap images. The timeline ramp view is a time-based visualization of seven days of captured images for the selected application. You can use your mouse scroll wheel or the up and down arrows in the bottom left corner of the page to move the timeline through the captured images and make a selection. See Access the timeline ramp view of an image for details.
Select the desired LiveClone image to mount, then select Mount from the drop-down list. Unlike snapshot images which are yellow, LiveClone images are purple.
The Mount page opens.
Select a host from Host drop-down list.
This setting only appears if the targeted host is a VMware VM. For Mount Mode, select one of the following:
- NFS: By default NFS mode is selected.
- vRDM (virtual raw device mapping): VMware snapshots treat mounted vRDMs as Independent and are not included in snapshots. Because of this, by default, Backup and DR does not include vRDMs when protecting a mounted VM. Backup and DR does provide an option where you can mark vRDMs as dependent. Although rarely used, when this option is enabled, vRDMs are included in VMware snapshots. Backup templates capture vRDMs marked as dependent.
- pRDM (physical raw device mapping): For file-level restore operations, select pRDM mode.
This setting only appears if the targeted host is a VMware VM and RDM mount mode is selected. From Map to ESX Hosts, select one of the following options:
- One: Select One if you want to map only to the ESX host currently running the target VM.
- Two: Select Two if you want to map to two ESX hosts, but not all ESX hosts in the cluster. On selecting Two, you are given the option to choose the second host, or choose Auto-select. Auto-select choose the second host based on logical pairs of ESX hosts and always selects the partner ESX host for the one currently running the target VM.
All: Select All if you want to map to all the ESX hosts present in the cluster. Selecting All may increase the duration for the job.
For Mount Drive (Windows only), specify a drive letter to be assigned to the volume. If the drive letter is not available, the job fails. If multiple volumes are found, then it assigns subsequent drive letters. If no mount drive is specified, the Backup and DR agent chooses a drive letter itself, if available.
For Mount Point, specify the full path at which you want to mount the volume. If the path exists as an empty folder, the Backup and DR agent uses it. If it does not exist, the Backup and DR agent creates it. If it exists as a file or as a folder that is not empty, then the job fails. If there are multiple volumes to be mounted, the Backup and DR agent chooses the user specified for one of the volumes and for the remaining it appends an underscore (_) followed by a number, for example, userspecified#.
If desired, enter a unique name associated with the LiveClone mount in Label.
Select a single volume or multiple volumes from the Select Volumes To Mount area of the page. By default, all volumes are selected, and the first volume cannot be deselected. For an individual file system there may be only one volume.
Specify the storage pool, mount drive, and mount point for each volume you want to mount.
Click Submit. A job is submitted to mount the LiveClone image to the selected host. You can verify that the clone operation is successful by viewing the job status in System Monitor. Once completed, the image becomes active and is available for use.
Refresh a LiveClone image
Refresh a LiveClone from another image to allow fast and efficient data refreshes for extract, transform, and load processes and test and development purposes.
Click App Manager and select Applications from the drop-down list.
The Applications page opens.
Select the application or VM that has the LiveClone image that you want to refresh, then choose Access from the drop-down list at the bottom of the Applications page.
Select a LiveClone, then select Refresh from the drop-down list. Unlike snapshot images which are yellow, LiveClone images are purple.
The Refresh page opens.
From the Refresh to Image drop-down list select the image you want to use to refresh.
Click Submit to refresh the LiveClone image.
Perform a prep mount for a LiveClone
You can prep-mount a LiveClone if you want to present a sanitized or otherwise processed snapshot before mounting the LiveClone image to target hosts. You can prep-mount a LiveClone image to scrub confidential or sensitive data.
Use these instructions to prep-mount a LiveClone.
Click App Manager and select Applications from the drop-down list.
The Applications page opens.
Select the application or VM that contains the LiveClone image that you want to mount, then choose Access from the drop-down list at the bottom of the Applications page.
Select the desired LiveClone image to prep mount, then select Prep Mount from the drop-down list.
The Prep Mount page opens.
Select a host from Host drop-down list.
To apply pre- and post-scripts to the LiveClone before mounting, from the Pre-Script and Post-Script fields enter the path and relative filenames. Also enter the timeout values to prevent hanging. We recommend 300 seconds as a default timeout value.
This setting only appears if the targeted host is a VMware VM. For Mount Mode, select one of the following:
- NFS: By default NFS mode is selected.
- vRDM (virtual raw device mapping): VMware snapshots treat mounted vRDMs as independent and are not included in snapshots. Because of this, by default, Backup and DR does not include vRDMs when protecting a mounted VM. Backup and DR does provide an option where you can mark vRDMs as dependent. Although rarely used, when this option is enabled, vRDMs is included in VMware snapshots. Backup templates captures vRDMs marked as dependent.
- pRDM (physical raw device mapping): For file-level restore operations, select pRDM mode.
For Mount Drive: (Windows only). Specify a drive letter to be assigned to the volume. If the drive letter is not available, the job fails. If multiple volumes are found, then it assigns subsequent drive letters. If no Mount Drive is specified, the Backup and DR agent chooses a drive letter itself, if available.
For Mount Point: Specify the full path at which you want to mount the volume. If the path exists as an empty folder, the Backup and DR agent uses it. If it does not exist, the Backup and DR agent creates it. If it exist as a file or as a folder that is not empty, then the job fails. If there are multiple volumes to be mounted, the Backup and DR agent chooses the user specified for one of the volumes and for the remaining it appends an underscore (_) followed by a number, for example, userspecified#.
Select a single volume or multiple volumes from the Select Volumes To Mount section. By default, all volumes are selected, and the first volume cannot be deselected. For an individual file system there may be only one volume. Specify the Storage Pool, Mount Drive, and Mount Point for each volume you want to mount.
Click Submit. A job is submitted to mount the LiveClone image to the selected host. You can verify that the clone operation is successful by viewing the job status in Monitor. Once completed, the image becomes active and is available for use.
Delete a LiveClone
You can delete a LiveClone when you are done with it in order to recover storage space.
Use these instructions to delete a LiveClone:
Click App Manager and select Applications from the drop-down list.
The Applications page opens.
Select the application or VM that contains the LiveClone image that you want to delete, then choose Access from the drop-down list at the bottom of the Applications page.
Select the desired LiveClone image, then select Delete from the list of access operations.
The Delete page opens.
Click Submit to delete the LiveClone image.