X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=fio.1;h=733c7406b33f804bf520ed9face5c9eba8378055;hp=dd4f9cb49caeedd93b4efbd0484c3e952e6a7827;hb=ec9e13345f3f433f3693891864cf794206cdd057;hpb=0cf90a62313ef47d02ef287a06e6f72d8b72380f

diff --git a/fio.1 b/fio.1
index dd4f9cb4..733c7406 100644
--- a/fio.1
+++ b/fio.1
@@ -1227,7 +1227,7 @@ If you want a workload that has 50% 2k reads and 50% 4k reads, while having
 90% 4k writes and 10% 8k writes, you would specify:
 .RS
 .P
-bssplit=2k/50:4k/50,4k/90,8k/10
+bssplit=2k/50:4k/50,4k/90:8k/10
 .RE
 .P
 Fio supports defining up to 64 different weights for each data direction.
@@ -1628,12 +1628,12 @@ constraint.
 .TP
 .B pmemblk
 Read and write using filesystem DAX to a file on a filesystem
-mounted with DAX on a persistent memory device through the NVML
+mounted with DAX on a persistent memory device through the PMDK
 libpmemblk library.
 .TP
 .B dev\-dax
 Read and write using device DAX to a persistent memory device (e.g.,
-/dev/dax0.0) through the NVML libpmem library.
+/dev/dax0.0) through the PMDK libpmem library.
 .TP
 .B external
 Prefix to specify loading an external I/O engine object file. Append
@@ -1649,7 +1649,7 @@ done other than creating the file.
 .TP
 .B libpmem
 Read and write using mmap I/O to a file on a filesystem
-mounted with DAX on a persistent memory device through the NVML
+mounted with DAX on a persistent memory device through the PMDK
 libpmem library.
 .SS "I/O engine specific parameters"
 In addition, there are some parameters which are only valid when a specific
@@ -1828,6 +1828,33 @@ unit access (fua) flag. Default: 0.
 .BI (sg)writefua \fR=\fPbool
 With writefua option set to 1, write operations include the force
 unit access (fua) flag. Default: 0.
+.TP
+.BI (sg)sg_write_mode \fR=\fPstr
+Specify the type of write commands to issue. This option can take three
+values:
+.RS
+.RS
+.TP
+.B write (default)
+Write opcodes are issued as usual
+.TP
+.B verify
+Issue WRITE AND VERIFY commands. The BYTCHK bit is set to 0. This
+directs the device to carry out a medium verification with no data
+comparison. The writefua option is ignored with this selection.
+.TP
+.B same
+Issue WRITE SAME commands. This transfers a single block to the device
+and writes this same block of data to a contiguous sequence of LBAs
+beginning at the specified offset. fio's block size parameter
+specifies the amount of data written with each command. However, the
+amount of data actually transferred to the device is equal to the
+device's block (sector) size. For a device with 512 byte sectors,
+blocksize=8k will write 16 sectors with each command. fio will still
+generate 8k of data for each command butonly the first 512 bytes will
+be used and transferred to the device. The writefua option is ignored
+with this selection.
+
 .SS "I/O depth"
 .TP
 .BI iodepth \fR=\fPint
@@ -2036,6 +2063,12 @@ respect the timestamps and attempt to replay them as fast as possible while
 still respecting ordering. The result is the same I/O pattern to a given
 device, but different timings.
 .TP
+.BI replay_time_scale \fR=\fPint
+When replaying I/O with \fBread_iolog\fR, fio will honor the original timing
+in the trace. With this option, it's possible to scale the time. It's a
+percentage option, if set to 50 it means run at 50% the original IO rate in
+the trace. If set to 200, run at twice the original IO rate. Defaults to 100.
+.TP
 .BI replay_redirect \fR=\fPstr
 While replaying I/O patterns using \fBread_iolog\fR the default behavior
 is to replay the IOPS onto the major/minor device that each IOP was recorded
@@ -2061,6 +2094,12 @@ value.
 Scale sector offsets down by this factor when replaying traces.
 .SS "Threads, processes and job synchronization"
 .TP
+.BI replay_skip \fR=\fPstr
+Sometimes it's useful to skip certain IO types in a replay trace. This could
+be, for instance, eliminating the writes in the trace. Or not replaying the
+trims/discards, if you are redirecting to a device that doesn't support them.
+This option takes a comma separated list of read, write, trim, sync.
+.TP
 .BI thread
 Fio defaults to creating jobs by using fork, however if this option is
 given, fio will create jobs by using POSIX Threads' function
@@ -2334,16 +2373,6 @@ previously written file. If the data direction includes any form of write,
 the verify will be of the newly written data.
 .RE
 .TP
-.BI verifysort \fR=\fPbool
-If true, fio will sort written verify blocks when it deems it faster to read
-them back in a sorted manner. This is often the case when overwriting an
-existing file, since the blocks are already laid out in the file system. You
-can ignore this option unless doing huge amounts of really fast I/O where
-the red\-black tree sorting CPU time becomes significant. Default: true.
-.TP
-.BI verifysort_nr \fR=\fPint
-Pre\-load and sort verify blocks for a read workload.
-.TP
 .BI verify_offset \fR=\fPint
 Swap the verification header with data somewhere else in the block before
 writing. It is swapped back before verifying.