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| # dd で全部やるパターン | |
| ionice -c3 dd if=/dev/zero of=100GB.img bs=1M count=102400 oflag=direct | |
| ionice -c3 dd if=/dev/zero of=100GB.img bs=1M count=102400 oflag=sync | |
| ionice -c3 dd if=/dev/zero of=100GB.img bs=1M count=102400 oflag=fdatasync | |
| ionice -c3 dd if=/dev/zero of=100GB.img bs=1M count=102400 oflag=fsync | |
| # 単位ファイルを作成して足し続けるパターン | |
| ionice -c3 dd if=/dev/zero of=100MB.img bs=1M count=100 oflag=direct | |
| for i in $(seq 1 1000); do ionice -c3 cat 100MB.img >> 100GB.img; sleep 5; done |
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