[PATCH] Add seperate read/write block size options
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/HOWTO b/HOWTO
index 79d31df..78a9be0 100644
--- a/HOWTO
+++ b/HOWTO
@@ -220,11 +220,21 @@
bs=siint The block size used for the io units. Defaults to 4k.
+read_bs=siint
+write_bs=siint If the workload is a mixed read-write workload, you can use
+ these options to set seperate block sizes.
+
bsrange=irange Instead of giving a single block size, specify a range
and fio will mix the issued io block sizes. The issued
io unit will always be a multiple of the minimum value
given (also see bs_unaligned).
+read_bsrange=irange
+write_bsrange=irange
+ If the workload is a mixed read-write workload, you can use
+ one of these options to set separate block size ranges for
+ reads and writes.
+
bs_unaligned If this option is given, any byte size value within bsrange
may be used as a block range. This typically wont work with
direct IO, as that normally requires sector alignment.