Code: Select all
$ cat /sys/block/*/queue/scheduler
noop anticipatory deadline [cfq]
noop anticipatory deadline [cfq]
none
none
<snip>
none
none
noop anticipatory deadline [cfq]
noop anticipatory deadline [cfq]
Code: Select all
# Zwei "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
#############
# Oder auch diese:
$ 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