On Mon, Jun 10, 2013 at 3:13 PM, Emalayan Vairavanathan
> I suspect that nodetool cleanup is IO intensive. So running nodetool cleanup
> concurrently on the entire cluster may have a significantly impact the IO
> performance of applications.
cleanup is a specific kind of compaction, and as such respects the
compaction throughput throttle.
The compaction throughput throttle is designed to prevent compaction
from negatively impacting the performance of things-not-compaction. If
you notice that cleanup compaction on all or most nodes consumes too
much i/o, reduce the throttle value.