On Sun, Jul 11, 2010 at 02:59:12PM +0000, Lubos Kolouch wrote: > Hello, > > during my testing of btrfs I found out, > that deletion of directory with many files (many millions) takes veeeery > long (it is running two weeks now and did not finish). > > But when instead of directory I create subvolume, it is deleted instantly. > > Is it normal behaviour? (gentoo 2.6.34-r1, btrfs-progs-9999). > Why the directory cannot be deleted instantly as well?
The subvolume deletion is able to walk much less metadata, and it is able to walk it in a more efficient order than a file by file deletion. Time to delete individual files depends mostly on metadata fragmentation and is mostly limited by reading in the file extent pointers and crcs. The bulk of this work can be pushed into the background, it is definitely on my todo list. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
