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- $ cat /sys/block/*/queue/scheduler
- noop anticipatory deadline [cfq]
- noop anticipatory deadline [cfq]
- none
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- noop anticipatory deadline [cfq]
- noop anticipatory deadline [cfq]
- # Now two "dd"s parallel
- $ ionice -c3 dd if=/dev/zero of=test1 bs=10M count=100 oflag=dsync
- 100+0 records in
- 100+0 records out
- 1048576000 bytes (1,0 GB) copied, 29,9719 s, 35,0 MB/s
- $ ionice -c2 -n1 dd if=/dev/zero of=test2 bs=10M count=100 oflag=dsync
- 100+0 records in
- 100+0 records out
- 1048576000 bytes (1,0 GB) copied, 37,251 s, 28,1 MB/s
- # Or also
- $ ionice -c3 dd if=/dev/zero of=test1 bs=14M count=1000
- 1000+0 records in
- 1000+0 records out
- 14680064000 bytes (15 GB) copied, 255,732 s, 57,4 MB/s
- $ ionice -c2 -n1 dd if=/dev/zero of=test2 bs=14M count=1000
- 1000+0 records in
- 1000+0 records out
- 14680064000 bytes (15 GB) copied, 254,077 s, 57,8 MB/s
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