阿里云存储I/O性能测试 – 朱小帅

测试工具：fio

参数：

filename=/dev/vda/test.big # 测试文件；
direct=1 # 测试过程绕过机器自带的buffer；
rw=randwrite # 随机写的I/O；
rw=randrw # 随机写和读的I/O；
bs=4K # I/O块文件大小为4K对齐；
size=8G # 文件大小为8G ，以每次4K的I/O进行测试；
numjobs=64 # 线程为64；
runtime=20 # 时间为20秒；
ioengine=psync # I/O引擎使用pync方式；
rwmixwrite=30 # 混合读写的模式下，写占30%；
group_reporting # 显示结果的，汇总每个进程的信息；
sync=1 # 异步I/O；
fsync=1 # 一个I/O就同步数据；

[zhupengfei@devops-centos8-shanghai-area2 packages ]$ dnf install -y libaio libaio-devel
[zhupengfei@devops-centos8-shanghai-area2 packages ]$ wget https://brick.kernel.dk/snaps/fio-3.10.tar.gz
[zhupengfei@devops-centos8-shanghai-area2 packages ]$ tar -zxxf fio-3.10.tar.gz && cd fio-3.10
[zhupengfei@devops-centos8-shanghai-area2 fio-3.10 ]$ sudo ./configure
[zhupengfei@devops-centos8-shanghai-area2 fio-3.10 ]$ sudo make && make install
[zhupengfei@devops-centos8-shanghai-area2 fio-3.10 ]$ sudo fio -filename=/dev/vda -direct=1 -iodepth 1 -thread -rw=write -ioengine=libaio -bs=1024k -size=8G -numjobs=4 -runtime=60 -group_reporting -name=checkdisk

checkdisk: (g=0): rw=write, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=libaio, iodepth=1
...
fio-3.10
Starting 4 threads
Jobs: 4 (f=4): [W(4)][100.0%][w=114MiB/s][w=114 IOPS][eta 00m:00s]
checkdisk: (groupid=0, jobs=4): err= 0: pid=7237: Mon Apr 26 10:47:35 2021
  write: IOPS=112, BW=113MiB/s (118MB/s)(6765MiB/60009msec)
    slat (usec): min=69, max=87376, avg=199.87, stdev=1880.42
    clat (msec): min=6, max=896, avg=35.27, stdev=35.49
     lat (msec): min=6, max=896, avg=35.47, stdev=35.51
    clat percentiles (msec):
     |  1.00th=[    9],  5.00th=[   11], 10.00th=[   11], 20.00th=[   12],
     | 30.00th=[   13], 40.00th=[   14], 50.00th=[   16], 60.00th=[   18],
     | 70.00th=[   70], 80.00th=[   74], 90.00th=[   78], 95.00th=[   80],
     | 99.00th=[   83], 99.50th=[   85], 99.90th=[  197], 99.95th=[  567],
     | 99.99th=[  894]
   bw (  KiB/s): min= 2048, max=32768, per=24.99%, avg=28844.22, stdev=3393.60, samples=480
   iops        : min=    2, max=   32, avg=28.12, stdev= 3.32, samples=480
  lat (msec)   : 10=4.48%, 20=59.32%, 50=1.48%, 100=34.53%, 250=0.12%
  lat (msec)   : 500=0.01%, 750=0.01%, 1000=0.04%
  cpu          : usr=0.26%, sys=0.20%, ctx=6805, majf=0, minf=4
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=0,6765,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
  WRITE: bw=113MiB/s (118MB/s), 113MiB/s-113MiB/s (118MB/s-118MB/s), io=6765MiB (7094MB), run=60009-60009msec

Disk stats (read/write):
  vda: ios=133/90314, merge=0/365, ticks=1352/2647495, in_queue=2354203, util=89.09%

进一步可参阅：阿里云存储I/O性能资料

吞吐量=IOPS * I/O大小，磁盘I/O越大，IOPS越高，每秒I/O的吞吐量越高，云服务器认为IOPS和吞吐量的数值越高越好，实际上磁盘IOPS和吞吐量两个参数是有其最大值的。

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