磁盘速度测试

方法1:

sudo hdparm -t /dev/sda1

测试结果

1虚-Timing buffered disk reads: 418 MB in  3.01 seconds = 138.91 MB/sec
2卡-Timing buffered disk reads:  62 MB in  3.00 seconds =  20.65 MB/sec
3实-Timing buffered disk reads: 512 MB in  2.50 seconds = 204.59 MB/sec

方法2:

time dd if=/dev/zero of=~/test.dat bs=1M count=512

测试结果(写)

1虚-536870912 bytes (537 MB, 512 MiB) copied, 3.41994 s, 157 MB/s
  5368709120 bytes (5.4 GB, 5.0 GiB) copied, 23.7681 s, 226 MB/s
2卡-536870912 bytes (537 MB) copied, 231.788 s, 2.3 MB/s
3实-536870912 bytes (537 MB) copied, 0.278789 s, 1.9 GB/s
  5368709120 bytes (5.4 GB) copied, 23.4228 s, 229 MB/s
  53687091200 bytes (54 GB) copied, 236.581 s, 227 MB/s

time dd if=~/test.dat of=/dev/null bs=1M

测试结果(读)

1虚-5368709120 bytes (5.4 GB, 5.0 GiB) copied, 22.9912 s, 234 MB/s
2卡-536870912 bytes (537 MB) copied, 24.172 s, 22.2 MB/s
3实-5368709120 bytes (5.4 GB) copied, 0.631668 s, 8.5 GB/s
  53687091200 bytes (54 GB) copied, 256.552 s, 209 MB/s

加测(100M网)

time sudo dd if=/dev/zero of=/mnt/test.dat bs=1M count=512
536870912 bytes (537 MB) copied, 46.0375 s, 11.7 MB/s
time sudo dd if=/mnt/test.datt of=/dev/null bs=1M
536870912 bytes (537 MB) copied, 46.1256 s, 11.6 MB/s

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