这个太不给力了....
service:~# dd if=/dev/zero of=test bs=64k count=512 oflag=dsync
512+0 records in
512+0 records out
33554432 bytes (34 MB) copied, 1.99386 s, 16.8 MB/s
service:~# dd if=/dev/zero of=test bs=64k count=512 oflag=dsync
512+0 records in
512+0 records out
33554432 bytes (34 MB) copied, 1.91936 s, 17.5 MB/s
service:~# dd if=/dev/zero of=test bs=64k count=512 oflag=dsync
512+0 records in
512+0 records out
33554432 bytes (34 MB) copied, 1.80459 s, 18.6 MB/s
service:~# dd if=/dev/zero of=test bs=64k count=512 oflag=dsync
512+0 records in
512+0 records out
33554432 bytes (34 MB) copied, 1.50826 s, 22.2 MB/s
service:~# dd if=/dev/zero of=test bs=64k count=512 oflag=dsync
512+0 records in
512+0 records out
33554432 bytes (34 MB) copied, 1.58812 s, 21.1 MB/s
这个又太给力了.....
loc:~# dd if=/dev/zero of=test bs=64k count=512 oflag=dsync
512+0 records in
512+0 records out
33554432 bytes (34 MB) copied, 0.412061 s, 81.4 MB/s
loc:~# dd if=/dev/zero of=test bs=64k count=512 oflag=dsync
512+0 records in
512+0 records out
33554432 bytes (34 MB) copied, 0.363344 s, 92.3 MB/s
loc:~# dd if=/dev/zero of=test bs=64k count=512 oflag=dsync
512+0 records in
512+0 records out
33554432 bytes (34 MB) copied, 1.41831 s, 23.7 MB/s
loc:~# dd if=/dev/zero of=test bs=64k count=512 oflag=dsync
512+0 records in
512+0 records out
33554432 bytes (34 MB) copied, 0.575783 s, 58.3 MB/s
loc:~# dd if=/dev/zero of=test bs=64k count=512 oflag=dsync
512+0 records in
512+0 records out
33554432 bytes (34 MB) copied, 0.411968 s, 81.4 MB/s
loc:~# dd if=/dev/zero of=test bs=64k count=512 oflag=dsync
512+0 records in
512+0 records out
33554432 bytes (34 MB) copied, 0.758297 s, 44.2 MB/s
loc:~# |