diskio priority

[Erez D]

hi

i need help in solving a problem:

i have few diskio consuming processes which i want to run in the bg (i.e. low priority)
and some other that access my computer via nfs.

but thease processes cause other process to operate very poorly
( for example: cursor stalls in vi for few seconds once in a while, even when not using disk)
i tryed using nice, but this seems only to effect cpu usage and not disk

anyone knows of a way to somthing similiar to 'nice' but for diskio ?


btw: i'm using centos4 (rhel4 clone) dual optron system

10x
erez.