The vmvstortransport option
specifies the preferred transports order (hierarchy) to use when backing
up or restoring VMware virtual machines. If you do not include a given
transport using this option, that transport is excluded and is not
used to transfer data.
The transport order
that you specify determines how the VMware
API for Data Protection (VADP) accesses virtual disk data, but it
does not influence the data path that is used between the
Tivoli® Storage
Manager client and
the
Tivoli Storage
Manager server.
Valid transports include any order or combination of the following
options:
- nbd
- Network based
data transfer. Access virtual disk data using the
LAN. This transport path is generally available in all configurations.
- nbdssl
- Same as nbd,
but the data is encrypted before
being sent over the LAN. Encryption can decrease performance.
- san
- Storage Area Network
transfer: Access virtual disk data using
the SAN.
- hotadd
- If
you use the Backup-Archive Client in a virtual machine, the
hotadd transport allows the transport of backed up data to dynamically
added storage.
Separate each transport option from
the others with
a colon, for example,
san:nbd:nbdssl:hotadd.
If
you do not specify a transport hierarchy, the default transport selection
order is san:hotadd:nbdssl:nbd.
The first
transport that is available is used to transfer the data. If you want
to prevent data transport over a particular path, do not include it
in the transport list. For example, if it is important to not disrupt
LAN traffic, omit the nbd transports from the hierarchy.
Set this option in dsm.sys.
Set this option in the client options file (dsm.opt).
Supported clients
This
option is valid for Windows clients that are configured to back up
or restore virtual machine files using VADP.
This
option is valid for Linux clients that are configured to back up or
restore virtual machine files using VADP.
Examples
- If the SAN is not available, do not transport backups
or restores
over the LAN
- VMVSTORTRANSPORT san
- The Backup-Archive Client is running in a virtual
machine, but
do not use the hotadd transport
- VMVSTORTRANSPORT nbdssl:nbd
- Use the LAN transport, even if nbdssl is available,
to obtain
better performance
- VMVSTORTRANSPORT nbd
- The SAN transport is preferred, but use nbd
when the SAN is not
available, and do not use nbdssl or hotadd
- VMVSTORTRANSPORT
san:nbd