phoronix benchmarks ext4 vs. btrfs

[Tomasz Torcz]

On Wed, Mar 07, 2012 at 04:01:48PM -0600, Michael Cronenworth wrote:
> Chris Murphy wrote:
> >Well, most of my colleagues and customers with desktop systems have rather extreme storage requirements. Individual files multi gigabyte composited image files. So an SSD is nice for speed, but cost prohibitive for everything to be stored on SSD. What they need is a file system that puts hot files on the SSD and cold files on HDD. I think there is btrfs code being worked on to do just that. I don't know if it's any more or less difficult to do this on other filesystems.
> 
> Yes, such a feature was submitted[1], but it has never been
> committed by Chris AFAIK. There is also a OS-agnostic method of
> this. Seagate XT drives use a small SSD as a cache. Then there is
> also a Windows method with Intel's SSD Cache using a dedicated SSD
> as only a cache. Either way gives you a similar result.

  And also http://bcache.evilpiepirate.org/ . And Facebook's https://github.com/facebook/flashcache .
And https://lwn.net/Articles/393013/ (cleancache), which is even in mainline kernel.
-- 
Tomasz Torcz              ,,If you try to upissue this patchset I shall be seeking
xmpp: zdzichubg at chrome.pl   an IP-routable hand grenade.'' -- Andrew Morton (LKML)