Various embodiments for streamlining data deduplication by a processor. In file storage utilizing re-writable storage media with data deduplication, a host layer file system is informed of available file space based on at least one of an available plurality of tracking operations performed by the processor, thereby providing an adjustable virtual free capacity file of deduplication pointers to facilitate deduplication functionality across a plurality of storage devices. As one of the available plurality of tracking devices, an actual block utilization tracking operation is utilized for gathering periodic statistics from deduplicating sources to enable analysis of trends in storage capacity utilization.