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I know that one of the main drawing points for ex3 and other journaling filesystems is that they do not fragment like NTFS and such.
I once heard someone say that ext3 actually would fragment when operated at near-full capacity for a length of time. Is there any truth to this? I've been running my main home ext3 partition at 95%+ capacity for at least a year and would like to know if this is actually causing any fragmentation, and if so does it clean up after itself automatically?
For some reason the host gives an error accessing the link above. Just shorten the URL and it works, e.g.: http://geekblog.oneandoneis2.org/index.php/2006/08/17/
– casualuser – 2009-11-24T02:34:31.563According to man page, -a does nothing re: fragmentation, afaik only reports frag levels – ptor – 2009-11-24T15:21:59.443
Ah, okay. Found a more legit article that shows how to defrag a Linux system using Shake. Just note that I wouldn't recommend doing this in most cases, as it's probably unnecessary. – Sasha Chedygov – 2009-11-24T23:28:22.473
How do you list all non-contiguous files along with their number of chunks? For example, filesystem may have just one file fragmented to 10000 chunks. And if this file is used much, performance penalty may seriously rise. But a percentage of non-contiguous files will be like 0.01% in this case. – Vladislav Rastrusny – 2014-01-21T07:00:09.783