DON'T MISS the excellent presentation by Akira Fujita:

Outline of Ext4 File System &
Ext4 Online Defragmentation Foresight
LinuxCon Japan/Tokyo 2010
September 28, 2010
Akira Fujita <a-fujita@rs.jp.nec.com>
NEC Software Tohoku, Ltd.


The 41 page pdf is found at http://events.linuxfoundation.org/sl...010_fujita.pdf