Using CA ARCserve Central Host-Based VM Backup › Define a Transport Mode for Backups

Define a Transport Mode for Backups

You can define a specific transport mode (transfer data) to use for D2D backup jobs that execute using Host-Based VM Backup. By default, Host-based VM backup uses a mode that lets Host-Based VM Backup to optimize the performance (increase the speed) of the backup operation. However, when you want to specify a particular transport mode for backup operations, you configure the registry key described in this topic.

Host-Based VM Backup can execute backups using the following transport modes:

• HOTADD transport mode
• NBD transport mode
• NBDSSL transport mode
• SAN transport mode

Be aware of the following considerations:

• This is an optional configuration task. By default, Host-Based VM Backup executes backups using a transport mode that optimizes the performance of the backup operation.
• When you configure this registry key to use a specific transport mode and the mode is not available, Host-Based VM Backup uses an available default transport mode for the backup operation.

Follow these steps:

1. Log in to the CA ARCserve D2D backup proxy system for the virtual machines.

   Open Windows Registry Editor and browse to the following key:

   [HKEY_LOCAL_MACHINE\SOFTWARE\CA\CA ARCSERVE D2D\AFBackupDll\{VM-InstanceUUID}].
   

2. Right-click VM-InstanceUUID and select New and click String Value on the pop-up menu.

   Name the new string value as follows:

   EnforceTransport
   

3. Right-click EnforceTransport and click Modify on the pop-up menu to open the Edit String dialog.
4. In the Value Data field, specify the transport mode that you want to use during the backup job. Specify one of the following values:

   hotadd

   HOTADD transport mode

   nbd

   NBD transport mode

   nbdssl

   NBDSSL transport mode

   san

   SAN transport mode

5. Click OK to apply the value and close the Edit String dialog.

The transport mode is defined and is used the next time that a job runs.