Use the vmskipctlcompression option for VM backups to specify whether control files (*.ctl) are compressed during VM backup. The option does not affect the compression of data files (*.dat)
compression yes
vmskipctlcompression yes
You must direct the data files to a storage
pool that is enabled for client-side deduplication. You can direct
the control files to a storage pool that is not enabled for client-side
deduplicationYou must be licensed to use IBM® Tivoli® Storage Manager for Virtual Environments to use this option.
This option can be used with supported Windows and Linux clients.
Place this option in the client options file (dsm.opt), or on the command line.