Vmvstorcompr

The vmvstorcompr option controls the use of compression by IBM Spectrum® Protect client during backup and restore operations.

Use this option to increase transport performance by using the NBD (Network Block Device) protocol.

Three types of compression are available: ZLIB, FASTLZ, and SKIPZ. To use compression, you must set the transport option to NBDSSL with the Vmvstortransport option.

NBDSSL compression is available with vSphere 6.5 and above.

Supported clients

Linux operating systems This option can be used with supported x86_64 Linux® clients.

Windows operating systems This option can be used with supported Windows clients. This option is not valid for Data Protection for Microsoft Hyper-V.

This feature is available only if the client operates as a data mover for IBM Spectrum Protect for Virtual Environments: Data Protection for VMware.

Options file

Linux operating systems This option is valid in the client system options file (dsm.sys), or on the command line for Backup VM. It can also be included on the server in a client option set. It cannot be set in the Preferences Editor.

Windows operating systems This option is valid in the client options file (dsm.opt) or on the command line for Backup VM. It can also be included on the server in a client option set. It cannot be set in the Preferences Editor.

Syntax

Parameters

ZLIB: Sets the type of compression to ZLIB with NBDSSL transport.
FASTLZ: Sets the type of compression to FASTLZ with NBDSSL transport.
SKIPZ: Sets the type of compression to SKIPZ with NBDSSL transport.

Examples

Command line:

To set the type of compression and transport mode for VM backup and restore operations with NBDSSL transport, issue the following command:

dsmc backup vm myVM -VMVSTORCOMPR=SKIPZ -VMVSTORTRANSPORT=NBDSSL

This example backs up the VM myVM using the SKIPZ compression protocol with the required transport setting of NBDSSL.

Options file:

VMVSTORCOMPR SKIPZ