Hey list, Although this is about the preload daemon, my intended audience for this matter is the btrfs community. So I'm posting this here.
I've created a small script here[1] to read the preload daemon state file and use this to run the btrfs defragmenter/compressor on these files. The idea was to have some proof-of-concept to maybe integrate defragmentation capabilities directly into preload. While I'd like to read some feedback from the community, maybe collect some more ideas, I already discovered one drawback which is a show-stopper: btrfs won't defragment files currently in use (probably memory-mapped files only but these are a lot while a desktop env is running). I didn't look into it any closer yet. And I didn't run benchmarks. But my first impressions are that preloading is a bit faster and less io-intensive. Regards, Kai [1]: https://gist.github.com/kakra/5520200
defrag-preloaded.rb
Description: application/ruby
