1. A method of improving the efficiency, and ensuring the integrity, of a data transfer from at least one source storage object to at least one destination storage object in a serverless backup system having one or more physical storage devices and being associated with a host, comprising the steps of: transferring from said host to said serverless backup system a command comprising one or more instructions designating a transfer of data from at least one source storage object to at least one destination storage object; and determining a desired manner of execution of said instructions as a function of components of said instructions.