[PATCH] Change output dev= to stdev=

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 1b34c283af0f385e00407a9167c6ec02820ad4a1..f36fc46e0b08d2aeed793519eae952b738b507f1 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -211,6 +211,9 @@ rw=str              Type of io pattern. Accepted values are:
                For certain types of io the result may still be skewed a bit,
                since the speed may be different.
 
+randrepeat=bool        For random IO workloads, seed the generator in a predictable
+               way so that results are repeatable across repetitions.
+
 size=siint     The total size of file io for this job. This may describe
                the size of the single file the job uses, or it may be
                divided between the number of files in the job. If the
@@ -274,7 +277,10 @@ iodepth=int        This defines how many io units to keep in flight against
                concurrency.
 
 direct=bool    If value is true, use non-buffered io. This is usually
-               O_DIRECT. Defaults to true.
+               O_DIRECT.
+
+buffered=bool  If value is true, use buffered io. This is the opposite
+               of the 'direct' option. Defaults to true.
 
 offset=siint   Start io at the given offset in the file. The data before
                the given offset will not be touched. This effectively
@@ -344,7 +350,7 @@ startdelay=int      Start this job the specified number of seconds after fio
                jobs, and you want to delay starting some jobs to a certain
                time.
 
-timeout=int    Tell fio to terminate processing after the specified number
+runtime=int    Tell fio to terminate processing after the specified number
                of seconds. It can be quite hard to determine for how long
                a specified job will run, so this parameter is handy to
                cap the total runtime to a given time.
@@ -526,9 +532,9 @@ direction, the output looks like:
 
 Client1 (g=0): err= 0:
   write: io=    32MiB, bw=   666KiB/s, runt= 50320msec
-    slat (msec): min=    0, max=  136, avg= 0.03, dev= 1.92
-    clat (msec): min=    0, max=  631, avg=48.50, dev=86.82
-    bw (KiB/s) : min=    0, max= 1196, per=51.00%, avg=664.02, dev=681.68
+    slat (msec): min=    0, max=  136, avg= 0.03, stdev= 1.92
+    clat (msec): min=    0, max=  631, avg=48.50, stdev=86.82
+    bw (KiB/s) : min=    0, max= 1196, per=51.00%, avg=664.02, stdev=681.68
   cpu        : usr=1.49%, sys=0.25%, ctx=7969
 
 The client number is printed, along with the group id and error of that