I still wondered how on earth it was possible the 100k+ files in Gentoo’s portage system – updated every time I synchronize the portage tree – didn’t fragment my filesystem. Or was my filesystem fragmented and did I not know? Only recently, I found a script that is actually able to put numbers to all this gut-feelings, and the results were quite surprising in my opinion.
Result: to achieve notable fragmentation level it’s necessary to do utmost. File fragmentation mainly happens in filesystems that contain large files. Pretty interesting.