Added description for iops output

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index ee899b8fdb6c402814086dde41f986d152c456c9..8b17610dd4a457438f56233d2ff5dfde80e63a61 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -382,7 +382,10 @@ size=int   The total size of file io for this job. Fio will run until
                fio will divide this size between the available files
                specified by the job. If not set, fio will use the full
                size of the given files or devices. If the the files
-               do not exist, size must be given.
+               do not exist, size must be given. It is also possible to
+               give size as a percentage between 1 and 100. If size=20%
+               is given, fio will use 20% of the full size of the given
+               files or devices.
 
 filesize=int   Individual file sizes. May be a range, in which case fio
                will select sizes for files at random within the given range
@@ -1200,7 +1203,7 @@ each thread, group of threads, and disks in that order. For each data
 direction, the output looks like:
 
 Client1 (g=0): err= 0:
-  write: io=    32MB, bw=   666KB/s, runt= 50320msec
+  write: io=    32MB, bw=   666KB/s, iops=89 , runt= 50320msec
     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 (KB/s) : min=    0, max= 1196, per=51.00%, avg=664.02, stdev=681.68
@@ -1218,6 +1221,7 @@ they denote:
 
 io=            Number of megabytes io performed
 bw=            Average bandwidth rate
+iops=           Average IOs performed per second
 runt=          The runtime of that thread
        slat=   Submission latency (avg being the average, stdev being the
                standard deviation). This is the time it took to submit