://linux.die.net/man/1/fio http://elf8848.iteye.com/blog/2168876 【讲的比较好】 注意，我先使用yum安装的fio，测试时候报错，建议使用最新版的.../configure make 即可在当前目录下生成fio可执行文件。 fio的几个参数： filename=/bdata/test.big 测试文件名称，通常选择需要测试的盘所在的目录。...rw=randwrite 测试随机写的I/O rw=randrw 测试随机写和读的I/O bs=4k 单次io的块文件大小为4k size=2g 本次的测试文件大小为2g，以每次4k的io进行测试。...sync=1 设置异步io fsync=1 一个io就同步数据 帮助命令： fio --help fio --cmdhelp 等等 # 准备个2GB的测试用的文件 dd if=/dev/zero of...=/bdata/test.big bs=4k count=524288 # 通常在需要测试的那个磁盘下面生成一个这种测试用的大文件 测试随机读写： fio --filename=/bdata/test.big
(sync、mmap、libaio、posixaio、SG v3、splice、null、network、 syslet、guasi、solarisaio，以及更多)， I/O 优先级（针对较新的 Linux...它能够在块设备和文件上工作。 Fio 接受一种非常简单易于理解的文本格式的任务描述。软件默认包含了几个示例任务文件。 Fio 展示了所有类型的 I/O 性能信息，包括完整的 IO 延迟和百分比。...它支持 Linux 、FreeBSD 、NetBSD、 OpenBSD、 OS X、 OpenSolaris、 AIX、 HP-UX、 Android 以及 Windows。...这个命令将要同一时间执行两个进程，写入共计 4GB（ 4 个任务 x 512MB = 2GB） 文件： sudo fio --name=randwrite --ioengine=libaio --iodepth...: sda: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00% 随机读测试 我们将要执行一个随机读测试，我们将会尝试读取一个随机的 2GB 文件
下面对各参建数进行解释 Option Comment -filename=/tmp/iotest/test 设定测试文件名 -direct=1 不使用缓存 -iodepth 1 io队列的深度 -thread...30% 4.blocksize并不统固定，其中4k占比10%，64K占比50%，32k占比40% 5.总大小为5G 6.50秒钟给出结果 [root@iZ116haf49sZ iotest]# time fio...group_reporting -name=mytest mytest: (g=0): rw=randrw, bs=4K-64K/4K-64K/4K-64K, ioengine=psync, iodepth=4 ... fio
This value can be in milliseconds or microseconds, fio will choose the most appropriate base and...This is the time from when IO leaves fio and when it gets completed....It is also possible to get fio to dump the current output while it is running, without terminating the...To do that, send fio the USR1 signal....If fio sees this file, it will unlink it and dump the current output status.
falloc IO engine that does regular fallocate to simulate data transfer as fio ioengine....HDFS, and engine will randomly pick a file out of those files based on the offset generated by fio...This may happen on Linux when using libaio and not setting direct=1, since buffered IO is not async...Keep an eye on the IO depth distribution in the fio output to verify that the achieved depth is as
Only supported on Linux. Note, this option may change going forward....If not set, fio will use the full size of the given files or devices....With this option, it is possible to define just the amount of IO that fio should do....Normally fio will operate within the size of a file....If this option is set, then fio will append to the file instead.
gtod_cpu=int Sometimes it'scheapertodedicateasinglethreadofexecutiontojustgettingthecurrenttime.Fio(anddatabases
local/bin/fio [root@iZ116haf49sZ bin]# /usr/local/bin/fio -h fio-2.1.10 /usr/local/bin/fio [options]...executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not...shared libs), for GNU/Linux 2.6.18, not stripped /usr/local/bin/fio-dedupe: ELF 64-bit LSB executable..., x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped...ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux
With the above in mind, here follows the complete list of fio job parameters....This may be used to override the name printed by fio for this job....filename=str Fio normally makes up a filename based on the job name, thread number, and file number...filename_format=str If sharing multiple files between jobs, it is usually necessary to have fio...lockfile=str Fio defaults to not locking any files before it does IO to them.
If fio is run with --trigger-file=/tmp/trigger-file, then it will continually check for the existence...: localbox$ fio --client=server --trigger-file=/tmp/my-trigger --trigger-remote="bash -c \"echo b >...On localbox, we could then have run fio with a local trigger instead: localbox$ fio --client=server...If that is set, fio will load the previously stored state....[root@iZ116haf49sZ fio]#
Normally fio includes a header with some basic information and checksumming, but if this option...If the data direction given is a read or random read, fio will assume that it should verify a previously...verifysort=bool If set, fio will sort written verify blocks when it deems it faster to read them back...verify_pattern=str If set, fio will fill the io buffers with this pattern....Fio defaults to filling with totally random bytes, but sometimes it'sinterestingtofillwithaknownpatternforioverificationpurposes.Dependingonthewidthofthepattern
--------- For scripted usage where you typically want to generate tables or graphs of the results, fio...Split up, the format is as follows: terse version, fio version, jobname, groupid, error READ status...description Completion latency percentiles can be a grouping of up to 20 sets, so for the terse output fio...For disk utilization, all disks used by fio are shown.
异步的话就是用类似libaio这样的Linux native aio一次提交一批，然后等待一批的完成，减少交互的次数，会更有效率。...io队列深度通常对不同的设备很敏感，那么如何用fio来探测出合理的值呢？...可以通过配置文件来配置压力测试的方式，可以用选项 --debug=io来检测fio是否工作 [root@vmforDB05 tmp]# cat fio_test [global] bsrange=...iometer 1.1.0 GA版本采用了Linux Kernel AIO方式，同时仅支持Direct IO。所以说，该版本也并非完美的异步IO解决方案应用。...一般平常测试都用FIO，参数多测的类型丰富也比较准确。 本文转载自网络
前言 fio 是一款非常经典的开源磁盘io测试工具 fio is an I/O tool meant to be used both for benchmark and stress/hardware...posixaio, SG v3, splice, null, network, syslet, guasi, solarisaio, and more), I/O priorities (for newer Linux...It supports Linux, FreeBSD, NetBSD, OpenBSD, OS X, OpenSolaris, AIX, HP-UX, Android, and Windows....这里介绍一下 fio 的基础操作，详细可以参考 官方文档 Tip: 当前版本 fio-2.2.11 ，访问官网可能得翻墙 ---- 概要 ---- 下载 [root@iZ116haf49sZ ~]# git...[root@iZ116haf49sZ ~]# ls fio [root@iZ116haf49sZ ~]# [root@iZ116haf49sZ ~]# cd fio/ [root@iZ116haf49sZ
附： 下面是关于 fio 的详细用法与各参数解释，在源码包的 HOWTO 文档里 [root@iZ116haf49sZ fio]# cat HOWTO Table of contents ------...How fio works 3. Running fio 4. Job file format 5. Detailed list of parameters 6. Normal output 7....When run, fio parses this file and sets everything up as described....: $ fio job_file and it will start doing what the job_file tells it to do....For each --name option that fio sees, it will start a new job with that name.
replay_no_stall=intWhenreplayingI/Owithread_iologthedefaultbehavioristoattemptto...
Theallowedvaluesare:noneExitonanyIOorverifyerrors.readContinueonreaderrors,exito...
This format is not supported in Fio versions => 1.20-rc3. 8.2 Trace file format v2 ----------------...-------- The second version of the trace file format was added in Fio version 1.17....The first line of the trace file has to be: fio version 2 iolog Following this can be lines in two...When the write phase has completed, fio switches to reads and verifies everything it wrote....With verification triggers, fio supports dumping the current write state to local files.
基本io benchmark [root@iZ116haf49sZ iotest]# fio -filename=/tmp/iotest/test -direct=1 -iodepth 1 -thread...group_reporting -name=mytest mytest: (g=0): rw=randrw, bs=16K-16K/16K-16K/16K-16K, ioengine=psync, iodepth=1 ... fio
--bs=32k --direct=0 --size=64m --numjobs=4When fio is utilized as a basis ofany reasonably large test...test filesize=1m include glob-include.fio [test] rw=randread bs=4k time_based=1 runtime=10 include test-include.fio...; -- end job file including.fio -- ; -- start job file glob-include.fio -- thread=1 group_reporting...=1 ; -- end job file glob-include.fio -- ; -- start job file test-include.fio -- ioengine=libaio iodepth...invocation and job file: $ SIZE=64m NUMJOBS=4 fio jobfile.fio ; -- start job file -- [random-writers
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