Peter Kjellstrom wrote:
On Tuesday 02 September 2008, Joseph L. Casale wrote:
Is there a way to nice the IO on a process such as dd? If not, what could be a way to control the IO level of such a process from bogging down a server to severely.
There is ionice (assuming CentOS-5) in the util-linux package. It's by no means perfect but unlike nice it atleast tries to do what you want :-)
If that doesn't do it for you then maybe choosing a different scheduler then cfq can help. Something like 'deadline' may work better for the workload.
AFAIK ionice will only work with the cfq scheduler for now.
-Ross
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