|
|
改成了写入512M重新测试,看来之前的结果是浮云
dd if=/dev/zero of=/backup/zerofile bs=1M count=512
512+0 records in
512+0 records out
536870912 bytes (537 MB) copied, 0.795101 seconds, 675 MB/s
# dd if=/dev/zero of=/home/zerofile bs=1M count=512
512+0 records in
512+0 records out
536870912 bytes (537 MB) copied, 1.18093 seconds, 455 MB/s
# dd if=/dev/zero of=/home/zerofile bs=1M count=512
512+0 records in
512+0 records out
536870912 bytes (537 MB) copied, 0.717623 seconds, 748 MB/s
这个 dd if=/dev/zero of=test bs=64k count=4k oflag=dsync 参数好像很猛,求解 |
|