On Fri, Apr 27, 2007 at 03:41:19PM +0200, Valerie Clement wrote:
> As asked by Alex, I included in the test results the file fragmentation
> level and the number of I/Os done during the file deletion.
>
> Here are the results obtained with a not very fragmented 100-GB file:
>
> | ext3 ext4 + extents xfs
> ------------------------------------------------------------
> nb of fragments | 796 798 15
> elapsed time | 2m0.306s 0m11.127s 0m0.553s
> |
> blks read | 206600 6416 352
> blks written | 13592 13064 104
> ------------------------------------------------------------
The metablockgroups feature should help the file fragmentation level
with extents. It's easy enough to enable this for ext4 (we just need
to remove some checks in ext4_check_descriptors), so we should just do
it.
- Ted
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