年付128M- [root@v ~]# dd if=/dev/zero of=test bs=64k count=4k oflag=dsync && rm -rf test
- 4096+0 records in
- 4096+0 records out
- 268435456 bytes (268 MB) copied, 2.96466 seconds, 90.5 MB/s
- [root@v ~]# dd if=/dev/zero of=iotest bs=64k count=16k conv=fdatasync 2>&1 | tail -n 1 && rm -rf iotest
- 1073741824 bytes (1.1 GB) copied, 4.44613 seconds, 242 MB/s
复制代码 256M的- [root@cache ~]# dd if=/dev/zero of=test bs=64k count=4k oflag=dsync && rm -rf test
- 4096+0 records in
- 4096+0 records out
- 268435456 bytes (268 MB) copied, 9.1575 seconds, 29.3 MB/s
- [root@cache ~]# dd if=/dev/zero of=iotest bs=64k count=16k conv=fdatasync 2>&1 | tail -n 1 && rm -rf iotest
- 1073741824 bytes (1.1 GB) copied, 9.07384 seconds, 118 MB/s
复制代码 |