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NetVault Plug-in for VMware 11.1 - User Guide

Introduction Installing the plug-in Configuring the plug-in Defining a backup strategy Using the image-level backup method Using the file-level backup method Restoring image-level backups Restoring file-level backups Troubleshooting

Enabling virtual machine locking

If a virtual machine is migrated (for example, through Storage vMotion) while a backup or restore job is in progress, it can cause a job to fail or it can create orphaned virtual disks on the datastores. To temporarily disable migration, the virtual machines can be locked before a job starts and unlocked when the job is completed.

By default, the locking mechanism is disabled and it is not used during backups and restores.

To enable virtual machine locking
1
Open the vmware.cfg file in any text editor. You can find this file in <NetVault Backup home>\config on Windows and <NetVault Backup home>/config on Linux.
2
In the [Custom:GetMigrationLock] section, set the Value option to True:
[Custom:GetMigrationLock]
Value = True
3
Save the file.

Unlocking a virtual machine

You can use the following procedure to unlock a virtual machine from the WebUI.

To unlock a virtual machine
1
Start the Backup Job Wizard, and click Create New next to the Selections list.
2
Open the NetVault Backup Client on which plug-in is installed, and then open VMware Plugin.
3
Open the ESX/ESXi or vCenter Server and the other applicable container nodes (for example, Datacenter, Cluster, Resource Pool, and other nodes) to display the target virtual machine.
4
Select the applicable virtual machine, and in the Actions list, click Unlock Virtual Machine.

 

Defining a backup strategy

•
About backup methods and types
•
Data backed up and restored for different disk types
•
Backup and recovery strategy

About backup methods and types

The Plug‑in for VMware supports image-level and file-level backup methods:

•
Image-level backups
•
File-level backups
Image-level backups

Image-level backups use the VMware snapshot technology to provide point-in-time image of virtual machines. You can use these backups to perform the following types of recoveries:

•
Recover a full virtual machine to a previous known state.
•
Restore one or more virtual disks for a virtual machine.
•
Restore individual files and directories to a specified location.
•
Restore virtual machine disk and configuration files to a specified location.

Image-level backups are supported on Linux- and Windows-based virtual machines. These can be performed with or without CBT.

Image-level backups with CBT

When CBT is enabled on a virtual machine, the following backup types are supported:

•
Full Backup: A Full Backup provides a backup of all allocated sectors on a virtual disk. Full Backups take longer to complete and consume more backup media. These backups serve as the base backup for future Incremental and Differential image-level backups.
•
Differential Backup: A Differential Backup provides a backup of disk sectors that have changed since the last Full Backup. Differential Backups speed up recovery since the plug-in is only required to restore two savesets.
•
Incremental Backup: An Incremental Backup provides a backup of disk sectors that have changed since the last Full, Differential, or Incremental Backup. Incremental Backups consume minimum storage space and are quicker to perform. However, data recovery can take more time depending on the number of savesets that the plug-in is required to restore.
Image-level backups without CBT

Only Full image-level backups are supported on virtual machines that do not use CBT.

File-level backups

The file-level backup method is only available to Windows-based virtual machines. File-level backups allow you to restore a single file or a set of files. You can use these backups to recover from data loss due to user errors, data corruption, or accidental deletion of files.

 
* 
NOTE: Only the Windows version of the Plug‑in for VMware supports file-level backups of virtual machines.

The Plug‑in for VMware uses NetVault Backup Plug-in for FileSystem (Plug-in for FileSystem) for file-level backups.

File-level backup types

The Plug‑in for VMware supports the following types of file-level backups:

•
Full Backup: A Full Backup provides a backup of all selected files and folders. Full Backups take longer to complete and consume more backup media. However, restores are faster since the plug-in is only required to restore a single saveset. Full Backups serve as the base backups for subsequent Incremental and Differential Backups
•
Differential Backup: A Differential Backup provides a backup of files that are new or have changed since the last Full Backup. Differential Backups speed up recovery since the plug-in is only required to restore two savesets. However, these backups consume more storage space and take more time to complete than the Incremental Backups. Differential Backups duplicate the data backed up by previous backups of the same type.
•
Incremental Backup: An Incremental Backup provides a backup of files that are new or have changed since the last Full or Incremental Backup. Incremental Backups consume minimum storage space and are quicker to perform. However, data recovery can take more time depending on the number of savesets that the plug-in is required to restore.
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