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.bin
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 1.94308 seconds, 138 MB/s
[root@MyHost ~]# 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, 18.0739 seconds, 14.9 MB/s
[root@MyHost ~]# dd if=/dev/zero of=test.bin bs=64k count=4k conv=fdatasync && r m -rf test.bin
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 1.69369 seconds, 158 MB/s
[root@MyHost ~]# 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, 16.3012 seconds, 16.5 MB/s
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