On 13/03/2013 03:52, Theodore Ts'o wrote:
>
> Did you sort results from readdir() by inode number? i.e., such as
> what the following LD_PRELOAD hack does?
>
> https://git.kernel.org/cgit/fs/ext2/e2fsprogs.git/tree/contrib/spd_readdir.c?h=maint
I don't think I tried this specific hack, I'm having a go right now.
Is is still useful if each directory only holds a few inodes ?
>> Right now I don't even know how to analyze my filesystem further.
>> Sorry for not being able to describe it more accurately. I'm in search
>> for any advice or direction to improve this situation. While keeping
>> using ext4 of course :).
>
> Try running "e2fsck -fv /dev/XXX" and send me the output.
>
> Also useful would be the output of "e2freefrag /dev/XXX" and "dumpe2fs -h"
Information attached. Dumpfs said: dumpe2fs 1.42.5 (29-Jul-2012).
Thanks for your help !
Device: /dev/vg-raid3/xyz
Blocksize: 4096 bytes
Total blocks: 78643200
Free blocks: 26099944 (33.2%)
Min. free extent: 4 KB
Max. free extent: 557632 KB
Avg. free extent: 468 KB
HISTOGRAM OF FREE EXTENT SIZES:
Extent Size Range : Free extents Free Blocks Percent
4K... 8K- : 52301 52301 0.20%
8K... 16K- : 36907 87967 0.34%
16K... 32K- : 36063 187694 0.72%
32K... 64K- : 41123 433236 1.66%
64K... 128K- : 26411 579943 2.22%
128K... 256K- : 16236 745344 2.86%
256K... 512K- : 6073 513906 1.97%
512K... 1024K- : 4378 774518 2.97%
1M... 2M- : 699 244092 0.94%
2M... 4M- : 392 280118 1.07%
4M... 8M- : 289 420979 1.61%
8M... 16M- : 308 906478 3.47%
16M... 32M- : 289 1520835 5.83%
32M... 64M- : 67 668899 2.56%
64M... 128M- : 479 13748140 52.67%
128M... 256M- : 16 875692 3.36%
256M... 512M- : 39 3920394 15.02%
512M... 1024M- : 1 139408 0.53%
e2fsck 1.41.12 (17-May-2010)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
9345910 inodes used (47.54%)
12447 non-contiguous files (0.1%)
34 non-contiguous directories (0.0%)
# of inodes with ind/dind/tind blocks: 0/0/0
Extent depth histogram: 9345889/11
52543256 blocks used (66.81%)
0 bad blocks
1 large file
3633315 regular files
5712586 directories
0 character device files
0 block device files
0 fifos
0 links
0 symbolic links (0 fast symbolic links)
0 sockets
--------
9345901 files
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