为什么我的RAID1读写访问速度慢于写访问?
我已经做了一些简单的性能testing,看起来从RAID1读取比写入要慢: root@dss0:~# for i in 1 2 3; do dd if=/dev/zero of=/dev/sda bs=1048576 count=131072; done 137438953472 bytes (137 GB) copied, 192.349 s, 715 MB/s 137438953472 bytes (137 GB) copied, 192.851 s, 713 MB/s 137438953472 bytes (137 GB) copied, 193.026 s, 712 MB/s root@dss0:~# for i in 1 2 3; do dd if=/dev/sda of=/dev/null bs=1048576 count=131072; […]