autodefrag by default, was: Lots of harddrive chatter

[Chris Murphy <lists@colorremedies.com>]

On Jul 21, 2013, at 4:38 AM, Duncan <1i5t5.duncan@cox.net> wrote:
> 
> What I'd suggest is to turn on the btrfs autodefrag mount option, and to 
> do it *BEFORE* you start installing stuff on the filesystem.

Is there a good reason why autodefrag is not a default mount option?


>  I believe 
> it's a known issue that a number of distro installers (what arch does I'm 
> not sure) tend to fragment their files pretty badly right off the bat if 
> you let them.  This would happen if they write data into an existing 
> file, perhaps because they install a package and then customize the config 
> files, or if they don't write whole files at once.  And a lot of btrfs 
> installs don't turn on the autodefrag option when they do thet first auto-
> mount to install stuff.  

Some installer teams are understandably reluctant to use non-default mount options.

Chris Murphy