On Thursday 17 November 2005 12:40, Vladimir V. Saveliev wrote: > Please try whether the attached patch improves anything. It simplifies > fsync by avoid commiting of transactions which do not modify file being > fsync-ed. > > The patch applied to 2.6.14-mm2 with warnings, but that can be ignored.
I haven't tried this patch yet, but I did try the earlier 'disable fsync completely' patch. In fact, I'm using it right now. It doesn't help. Therefore, your patch probably won't help either. OK, disabling fsync does help a *little* bit. But I think that the issue (for me, anyway) isn't sync per se, it's just flat-out access time. Deleteing lots of small files is EXTREMELY slow, but even reading files is slower than it should be. It took no less that 10 minutes to delete an old kernel source tree, for instance. It's related to fragmentation, I think. I didn't really notice any speed problems until my hard drive got to about 95% (or so) full. But they haven't gone away, even though usage is now down around 54%. Hrm... I should be able to check that... About an hour later... So maybe I was wrong. 6.5% data fragmentation doesn't seem that high. But 19.8% tree fragmentation does seem a bit high. How should this data be interpreted? #measurefs.reiser4 -T /dev/mapper/e-h -f measurefs.reiser4 1.0.5 Copyright (C) 2001, 2002, 2003, 2004 by Hans Reiser, licensing governed by reiser4progs/COPYING. Tree fragmentation ... done 0.197747 #measurefs.reiser4 -S -D /dev/mapper/e-h -f measurefs.reiser4 1.0.5 Copyright (C) 2001, 2002, 2003, 2004 by Hans Reiser, licensing governed by reiser4progs/COPYING. Data fragmentation ... done 0.065593 Tree statistics ... done Packing statistics: Formatted nodes: 3721.29b (90.85%) Branch nodes: 1734.57b (42.35%) Twig nodes: 2886.97b (70.48%) Leaf nodes: 3814.82b (93.14%) Node statistics: Total nodes: 8543553 Formatted nodes: 146354 Unformatted nodes: 8397199 Branch nodes: 292 Twig nodes: 10542 Leaf nodes: 8532719 Item statistics: Total items: 637352 Nodeptr items: 146353 Statdata items: 191218 Direntry items: 17512 Tail items: 245018 Extent items: 36869 #
