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发表于 2011-11-9 20:04:56
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还是忍不住DD了一下,,,
unicom:~# dd if=/dev/zero of=test.bin bs=64k count=4k conv=fdatasync && rm -rf test.bin
dd if=/dev/zero of=test.bin bs=64k count=4k conv=fdatasync && rm -rf test.bin
dd if=/dev/zero of=test.bin bs=64k count=4k oflag=dsync && rm -rf test.bin
dd if=/dev/zero of=test.bin bs=64k count=4k conv=fdatasync && rm -rf test.bin
dd if=/dev/zero of=test.bin bs=64k count=4k oflag=dsync && rm -rf test.bin4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 0.543309 s, 494 MB/s
unicom:~# dd if=/dev/zero of=test.bin bs=64k count=4k oflag=dsync && rm -rf test.bin
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 1.61103 s, 167 MB/s
unicom:~# dd if=/dev/zero of=test.bin bs=64k count=4k conv=fdatasync && rm -rf test.bin
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 0.559652 s, 480 MB/s
unicom:~# dd if=/dev/zero of=test.bin bs=64k count=4k oflag=dsync && rm -rf test.bin
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 1.60429 s, 167 MB/s
unicom:~# dd if=/dev/zero of=test.bin bs=64k count=4k conv=fdatasync && rm -rf test.bin
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 0.56486 s, 475 MB/s |
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