6 Oct
2011
6 Oct
'11
7:10 p.m.
Hi,
iotop may report as much as 2M/s on the host, with an average of about 400-600K/s. Does that seem like a lot? I can write like 80MB/s at least using dd to test.
I had similar problems previously. The crux in my case is the number of IOPS possible. 100K of 2KB file writes is still 2MB/s but requires a lot more IO overheads than 1 single 2MB file.
Can I also ask how you measured performance and the effect any changes you made may have had on the system? iotop seems very general. Perhaps sar? Ideas for graphing its output? Thanks again, Alex