每台服务器的配置都不太一样，阿里云稍微高点的IO是ssd 其他是普通的（一般都是4核8G，高的有8核16G，都是按流量计费）。LInode vultr 都是默认最低配置 5美元，2.5美元
美团的是免费的最低配置（优惠卷）
使用的软件 hdparm
系统大部分是CentOS 7 或者 Fedora 26
不精准测试 不能用做任何参考
<code>
➜ ~ ruby rb.rb
vultr
/dev/vda1:
Timing cached reads: 24340 MB in 2.00 seconds = 12180.75 MB/sec
Timing buffered disk reads: 1168 MB in 3.00 seconds = 388.98 MB/sec
阿里云
/dev/vda1:
Timing cached reads: 16814 MB in 2.00 seconds = 8416.46 MB/sec
Timing buffered disk reads: 168 MB in 3.05 seconds = 55.15 MB/sec
阿里云
/dev/vda1:
Timing cached reads: 17656 MB in 2.00 seconds = 8838.12 MB/sec
Timing buffered disk reads: 162 MB in 3.01 seconds = 53.82 MB/sec
Linode1
/dev/xvda:
Timing cached reads: 18184 MB in 1.98 seconds = 9182.51 MB/sec
Timing buffered disk reads: 700 MB in 3.00 seconds = 232.96 MB/sec
阿里云
/dev/vda1:
Timing cached reads: 17850 MB in 2.00 seconds = 8936.20 MB/sec
Timing buffered disk reads: 162 MB in 3.01 seconds = 53.74 MB/sec
Linode2
/dev/sda:
Timing cached reads: 16516 MB in 2.00 seconds = 8271.33 MB/sec
Timing buffered disk reads: 5984 MB in 3.00 seconds = 1992.70 MB/sec
阿里云
/dev/vda1:
Timing cached reads: 16278 MB in 2.00 seconds = 8147.42 MB/sec
Timing buffered disk reads: 296 MB in 3.01 seconds = 98.47 MB/sec
阿里云
/dev/vda1:
Timing cached reads: 15240 MB in 2.00 seconds = 7633.21 MB/sec
Timing buffered disk reads: 152 MB in 3.00 seconds = 50.60 MB/sec
阿里云
/dev/vda1:
Timing cached reads: 16834 MB in 2.00 seconds = 8425.96 MB/sec
Timing buffered disk reads: 332 MB in 3.02 seconds = 109.95 MB/sec
阿里云
/dev/vda1:
Timing cached reads: 17616 MB in 2.00 seconds = 8820.87 MB/sec
Timing buffered disk reads: 330 MB in 3.01 seconds = 109.58 MB/sec
阿里云
/dev/vda1:
Timing cached reads: 19880 MB in 2.00 seconds = 9954.78 MB/sec
Timing buffered disk reads: 162 MB in 3.01 seconds = 53.83 MB/sec
阿里云
/dev/vda1:
Timing cached reads: 20034 MB in 2.00 seconds = 10032.11 MB/sec
Timing buffered disk reads: 162 MB in 3.01 seconds = 53.88 MB/sec
阿里云
/dev/vda1:
Timing cached reads: 18622 MB in 2.00 seconds = 9323.39 MB/sec
Timing buffered disk reads: 162 MB in 3.01 seconds = 53.78 MB/sec
美团
/dev/vda1:
Timing cached reads: 19922 MB in 2.00 seconds = 9975.35 MB/sec
Timing buffered disk reads: 462 MB in 3.01 seconds = 153.69 MB/sec
➜ ~
</code>
<img src="https://ipsec.in/wp-content/uploads/2017/08/001.png" alt="" width="867" height="821" class="alignnone size-full wp-image-49" />
<img src="https://ipsec.in/wp-content/uploads/2017/08/002.png" alt="" width="705" height="961" class="alignnone size-full wp-image-48" />
我的意思是阿里云的IO真的很一般
Linode2为什么这么高？有可能错误
此文章不用做任何参考