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| author | Shaohua Li <shli@fb.com> | 2017-02-15 19:58:05 -0800 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2017-03-16 16:55:51 -0700 |
| commit | 84890c03b6c5d7e8d76ea5e20b6aaf7e7ad410f0 (patch) | |
| tree | 68faa6589a2f76235444403cbef5ebb7d55ad157 /drivers/md/raid5.c | |
| parent | 535ae4eb1225f19e1d1848c65eafea8b7e9112f4 (diff) | |
| download | blackbird-op-linux-84890c03b6c5d7e8d76ea5e20b6aaf7e7ad410f0.tar.gz blackbird-op-linux-84890c03b6c5d7e8d76ea5e20b6aaf7e7ad410f0.zip | |
md/raid5-cache: bump flush stripe batch size
Bump the flush stripe batch size to 2048. For my 12 disks raid
array, the stripes takes:
12 * 4k * 2048 = 96MB
This is still quite small. A hardware raid card generally has 1GB size,
which we suggest the raid5-cache has similar cache size.
The advantage of a big batch size is we can dispatch a lot of IO in the
same time, then we can do some scheduling to make better IO pattern.
Last patch prioritizes stripes, so we don't worry about a big flush
stripe batch will starve normal stripes.
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid5.c')
0 files changed, 0 insertions, 0 deletions
