Re: autodefrag by default, was: Lots of harddrive chatter

[Shridhar Daithankar <ghodechhap@ghodechhap.net>]

On Sunday, July 21, 2013 04:44:09 PM George Mitchell wrote:
> Unless auto-defrag can work around the 
> in-use file issue, that could be a problem since some heavily used 
> system files are open virtually all the time the system is up and 
> running.  Has this issue been investigated and if so are there any 
> system files that don't get defragmented that matter?  Or is this a 
> non-issue in that any constantly in use system files don't really matter 
> anyway?  That is really the only question I have before moving away from 
> my current offline approach to the auto-defrag mount option for system 
> filesystems (/, /boot, /usr, /opt, /var, etc).

AFAIK, defragmentation is proportional to amount of writes to a file or 
direcotries.

system files typically are installed once and never rewritten in place, so 
they should not be much fragmented to begin with.

now their directory objects, is a different story and so is things like 
systemd journal, log files, or database files. 
-- 
Regards
 Shridhar