--help Print this page
--cmdhelp=cmd Print command help, "all" for all of them
--showcmd Turn a job file into command line options
- --readonly Turn on safety read-only checks, preventing writes
+ --readonly Turn on safety read-only checks, preventing
+ writes
--eta=when When ETA estimate should be printed
May be "always", "never" or "auto"
- --section=name Only run specified section in job file
+ --section=name Only run specified section in job file. Multiple
+ sections can be specified.
--alloc-size=kb Set smalloc pool to this size in kb (def 1024)
--warnings-fatal Fio parser warnings are fatal
+ --max-jobs Maximum number of threads/processes to support
Any parameters following the options will be assumed to be job files,
can be used to gauge hard drive speed over the entire
platter, without reading everything. Both x/y can
include k/m/g suffix.
- iolog=x Open and read io pattern from file 'x'. The file must
- contain one io action per line in the following format:
- rw, offset, length
- where with rw=0/1 for read/write, and the offset
- and length entries being in bytes.
+ read_iolog=x Open and read io pattern from file 'x'. The file format
+ is described in the HOWTO.
write_iolog=x Write an iolog to file 'x' in the same format as iolog.
The iolog options are exclusive, if both given the
read iolog will be performed. Specify a separate file
Platforms
---------
-Fio works on (at least) Linux, Solaris, AIX, OSX, NetBSD, Windows and FreeBSD.
-Some features and/or options may only be available on some of the platforms,
-typically because those features only apply to that platform (like the
-solarisaio engine, or the splice engine on Linux).
+Fio works on (at least) Linux, Solaris, AIX, HP-UX, OSX, NetBSD, Windows
+and FreeBSD. Some features and/or options may only be available on some of
+the platforms, typically because those features only apply to that platform
+(like the solarisaio engine, or the splice engine on Linux).
Some features are not available on FreeBSD/Solaris even if they could be
implemented, I'd be happy to take patches for that. An example of that is