On Tue, Apr 14, 2015 at 07:37:17AM +0000, Russell Coker wrote: > The current defragmentation options seem to only support defragmenting named > files/directories or a recursive defragmentation of files and directories. > > I'd like to recursively defragment directories. One of my systems has a large > number of large files, the files are write-once and read performance is good > enough. However performance of "ls -al" is often very poor, presumably due to > metadata fragmentation. Ie. the directory metadata in the b-tree. That's possible, but not all of the code is there. So fare only whole-tree defragmentation is implemented, ie. the extent tree or any subvolume tree. We'd have to extend the defrag api to take a key range and then use it to span the directory key range. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
