This is another test: this time I wrote a 6GB file on top af an ext3 fs on top of a 8GB pendrive...
This 8GB pendrive is slightly faster than the other one...
------------------ noop ------------------ elapsed: 10' 38", no slowdown, all good... avg-cpu: %user %nice %system %iowait %steal %idle 13.75 0.01 9.10 51.23 0.00 26.33 ------------------ anticipatory ------------------ elapsed: 09' 46", no slowdown, all good... avg-cpu: %user %nice %system %iowait %steal %idle 19.22 0.01 13.04 43.32 0.00 24.88 ------------------ deadline ------------------ elapsed: 09' 45", no slowdown, all good... avg-cpu: %user %nice %system %iowait %steal %idle 18.90 0.02 13.20 46.88 0.00 21.40 ------------------ cfq ------------------ elapsed: 09' 39", no slowdown, all good... avg-cpu: %user %nice %system %iowait %steal %idle 18.56 0.01 12.58 43.52 0.00 25.65 -------------------------------------------
Now, I'm a bit disappointed... Some time it (cfq) work very well, some time it's a disaster!
This is another test: this time I wrote a 6GB file on top af an ext3 fs on top of a 8GB pendrive...
This 8GB pendrive is slightly faster than the other one...
------------------ noop ------------------ ------- ------- ------- ------- ------- -
elapsed: 10' 38", no slowdown, all good...
avg-cpu: %user %nice %system %iowait %steal %idle
13.75 0.01 9.10 51.23 0.00 26.33
------------------ anticipatory ------------------
elapsed: 09' 46", no slowdown, all good...
avg-cpu: %user %nice %system %iowait %steal %idle
19.22 0.01 13.04 43.32 0.00 24.88
------------------ deadline ------------------
elapsed: 09' 45", no slowdown, all good...
avg-cpu: %user %nice %system %iowait %steal %idle
18.90 0.02 13.20 46.88 0.00 21.40
------------------ cfq ------------------
elapsed: 09' 39", no slowdown, all good...
avg-cpu: %user %nice %system %iowait %steal %idle
18.56 0.01 12.58 43.52 0.00 25.65
-------
Now, I'm a bit disappointed...
Some time it (cfq) work very well, some time it's a disaster!