[PATCH] Add seperate read/write block size options

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 79d31dffde05e8002397b0771f2c87193f293c09..78a9be037839b1692bdca1e64f6283daaa3aad4c 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -220,11 +220,21 @@ size=siint        The total size of file io for this job. This may describe
 
 bs=siint       The block size used for the io units. Defaults to 4k.
 
 
 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).
 
 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.
 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.