On Tue, 2008-09-02 at 16:28 +0200, Lorenzo Quatrini wrote: > Joseph L. Casale ha scritto: > > 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. > > > > As I was told few days ago you cold nice the whole process, eg. > > nice 19 if=/xxx of=/xxx bs=nnn > > This should give all the other process priority over dd Saw the type fix. Just want to mention that the "bs=" can have a substantial beneficial effect. By increasing the blocksize to a relative large value, the number of system and I/O calls is reduced. This *may* reduce the adverse effects that you see on overall system responsiveness. I often use 8192, 16384 and even 8Mb, a "cylinder size". Give it a try. YMMV. > > Hope this helps > > -- > Regards > Lorenzo Quatrini > <snip sig stuff> -- Bill