Show IOPS as well as bw numbers

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index ea943ee04544408a60776a67807dec5737d741a8..f9e3fc708530c7b963d00035a749869771d6f4f2 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -253,6 +253,10 @@ bs_unaligned       If this option is given, any byte size value within bsrange
 
 nrfiles=int    Number of files to use for this job. Defaults to 1.
 
+openfiles=int  Number of files to keep open at the same time. Defaults to
+               the same as nrfiles, can be set smaller to limit the number
+               simultaneous opens.
+
 file_service_type=str  Defines how fio decides which file from a job to
                service next. The following types are defined:
 
@@ -261,6 +265,11 @@ file_service_type=str  Defines how fio decides which file from a job to
                        roundrobin  Round robin over open files. This
                                is the default.
 
+               The string can have a number appended, indicating how
+               often to switch to a new file. So if option random:4 is
+               given, fio will switch to a new random file after 4 ios
+               have been issued.
+
 ioengine=str   Defines how the job issues io to the file. The following
                types are defined:
 
@@ -297,6 +306,12 @@ ioengine=str       Defines how the job issues io to the file. The following
                                or receive, if the latter only the port
                                argument is used.
 
+                       cpu     Doesn't transfer any data, but burns CPU
+                               cycles according to the cpuload= and
+                               cpucycle= options. Setting cpuload=85
+                               will cause that job to do nothing but burn
+                               85% of the CPU.
+
                        external Prefix to specify loading an external
                                IO engine object file. Append the engine
                                filename, eg ioengine=external:/tmp/foo.o