Well, I mean... Docker <i>does</i> provide deduplication on the same base image. So two containers created &quot;FROM ubuntu:14.04&quot; which are both reading from (for example) &#x2F;etc&#x2F;issue are using the same data. But you specifically mention across different images, and I just don&#x27;t think there are enough similarities to warrant that functionality. I mean how many files are the same across CentOS 7 and Ubuntu 14.04? I just don&#x27;t see the benefit that you do.