近期一些服务器出现I/O瓶颈,在测试这些
单盘读写速度
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1 2 3 4 |
/dev/sda: Timing cached reads: 18764 MB in 1.99 seconds = 9424.14 MB/sec Timing buffered disk reads: 450 MB in 3.00 seconds = 149.86 MB/sec |
Raid0 以后的读写速度
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1 2 3 4 |
/dev/md0: Timing cached reads: 16938 MB in 1.99 seconds = 8505.15 MB/sec Timing buffered disk reads: 634 MB in 3.01 seconds = 210.71 MB/sec |
这种情况下 理论速度应该有300MB/sec的,但是实际提升200MB/sec