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| author |   Chris Mason <chris.mason@fusionio.com> | 2013-01-31 14:42:28 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2013-02-01 14:24:24 -0500 |
| commit | 6ac0f4884eaad28441c6e0f9d1400a08c2149049 (patch) | |
| tree | 251d86c33360948671a1b4d8cb5a38a5724468a6 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | Btrfs: Add a stripe cache to raid56 (diff) | |
| download | linux-dev-6ac0f4884eaad28441c6e0f9d1400a08c2149049.tar.xz linux-dev-6ac0f4884eaad28441c6e0f9d1400a08c2149049.zip | |
Btrfs: add a plugging callback to raid56 writes
Buffered writes and DIRECT_IO writes will often break up
big contiguous changes to the file into sub-stripe writes.
This adds a plugging callback to gather those smaller writes full stripe
writes.
Example on flash:
fio job to do 64K writes in batches of 3 (which makes a full stripe):
With plugging: 450MB/s
Without plugging: 220MB/s
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions