1. A method comprising: dividing files corresponding to an address space into multiple containers; performing a file metadata scan, including obtaining attributes for files in each container; aggregating the file attributes into characterizations for each attribute dimension, and generating a content feature summary for each container based on a selection window and a signature list, wherein the content feature summary incorporates the characterizations and summarizes the signature list, wherein generating the content feature summary comprises computing one or more discrete file summaries, and wherein computing a discrete file summary comprises: selecting a file from a subset of files within one of the containers, and extracting one or more features from one or more attributes of the selected file; computing a signature from the one or more extracted features, wherein the signature comprises a numerical value; and adding the signature to the signature list in response to the numerical value being less than a first threshold associated with the selection window; measuring a content similarity prediction measurement between containers from the generated content feature summary; and assigning files from each container to a de-duplication domain based on the computed content similarity prediction measurement.