X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=README;h=a13501708c081baaed0b8b3e2478802afabc3992;hp=cc84fede5054adf38003872a21d93fa7bf92bcd7;hb=3449ab8c4d2addb716105ded698438a1d3811572;hpb=7d130d8d2a5638ca91dc81ec085acef4d3c3ad08 diff --git a/README b/README index cc84fede..a1350170 100644 --- a/README +++ b/README @@ -16,7 +16,10 @@ fio resides in a git repo, the canonical place is: git://git.kernel.dk/fio.git -The http protocol also works, path is the same. +If you are inside a corporate firewall, git:// may not always work for +you. In that case you can use the http protocol, path is the same: + +http://git.kernel.dk/fio.git Snapshots are frequently generated and they include the git meta data as well. You can download them here: @@ -106,22 +109,11 @@ based distros, it's typically called libaio-devel. Windows ------- -On Windows Cygwin (http://www.cygwin.com) is required with at least -devel/gcc4 and devel/make installed in order to build fio, and -admin/cygrunsrv to run it. You can also install devel/git to fetch/update -the source files. To create an MSI installer package, install WiX 3.6 from +On Windows MinGW (http://www.mingw.org/) is required in order to +build fio. To create an MSI installer package install WiX 3.6 from http://wix.sourceforge.net/releases/ and run dobuild.cmd from the os/windows directory. -Before running fio you'll need to have a copy of cygserver running. Run -"/usr/bin/cygserver-config" from an elevated Cygwin shell (i.e. launch the -Cygwin shell under the Administrator account) to configure it. Once -configured, run "net start cygserver" to start it, or type -"/usr/sbin/cygserver &" in the Cygwin shell to start a local copy. - -If fio exits with the message "Bad system call" it normally means that -Cygserver isn't running. - Command line ------------ @@ -129,20 +121,28 @@ Command line $ fio --debug Enable some debugging options (see below) --output Write output to file - --timeout Runtime in seconds - --latency-log Generate per-job latency logs - --bandwidth-log Generate per-job bandwidth logs + --runtime Runtime in seconds + --latency-log Generate per-job latency logs + --bandwidth-log Generate per-job bandwidth logs --minimal Minimal (terse) output --version Print version info and exit + --terse-version=type Terse version output format (default 3, or 2 or 4). --help Print this page - --cmdhelp=cmd Print command help, "all" for all of them + --cmdhelp=cmd Print command help, "all" for all of them + --enghelp=engine Print ioengine help, or list available ioengines + --enghelp=engine,cmd Print help for an ioengine cmd --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 - --alloc-size=kb Set smalloc pool to this size in kb (def 1024) - --warnings-fatal Fio parser warnings are fatal + May be "always", "never" or "auto" + --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 + --server=args Start backend server. See Client/Server section. + --client=host Connect to specified backend. Any parameters following the options will be assumed to be job files, @@ -161,11 +161,11 @@ options in fio. Currently the options are: process Dump info related to processes file Dump info related to file actions - io Dump info related to IO queuing - mem Dump info related to memory allocations + io Dump info related to IO queuing + mem Dump info related to memory allocations blktrace Dump info related to blktrace setup verify Dump info related to IO verification - all Enable all debug options + all Enable all debug options random Dump info related to random offset generation parse Dump info related to option matching and parsing diskutil Dump info related to disk utilization updates @@ -286,11 +286,8 @@ The job file parameters are: 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 @@ -311,13 +308,70 @@ The job file parameters are: +Client/server +------------ + +Normally you would run fio as a stand-alone application on the machine +where the IO workload should be generated. However, it is also possible to +run the frontend and backend of fio separately. This makes it possible to +have a fio server running on the machine(s) where the IO workload should +be running, while controlling it from another machine. + +To start the server, you would do: + +fio --server=args + +on that machine, where args defines what fio listens to. The arguments +are of the form 'type,hostname or IP,port'. 'type' is either 'ip' (or ip4) +for TCP/IP v4, 'ip6' for TCP/IP v6, or 'sock' for a local unix domain socket. +'hostname' is either a hostname or IP address, and 'port' is the port to +listen to (only valid for TCP/IP, not a local socket). Some examples: + +1) fio --server + + Start a fio server, listening on all interfaces on the default port (8765). + +2) fio --server=ip:hostname,4444 + + Start a fio server, listening on IP belonging to hostname and on port 4444. + +3) fio --server=ip6:::1,4444 + + Start a fio server, listening on IPv6 localhost ::1 and on port 4444. + +4) fio --server=,4444 + + Start a fio server, listening on all interfaces on port 4444. + +5) fio --server=1.2.3.4 + + Start a fio server, listening on IP 1.2.3.4 on the default port. + +6) fio --server=sock:/tmp/fio.sock + + Start a fio server, listening on the local socket /tmp/fio.sock. + +When a server is running, you can connect to it from a client. The client +is run with: + +fio --local-args --client=server --remote-args + +where --local-args are arguments that are local to the client where it is +running, 'server' is the connect string, and --remote-args and +are sent to the server. The 'server' string follows the same format as it +does on the server side, to allow IP/hostname/socket and port strings. +You can connect to multiple clients as well, to do that you could run: + +fio --client=server2 --client=server2 + + 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