There isn't any way on Linux to deal with processes that create dirty pages. It is folly to try. The only way to deal is to put I/O stuff on a whole box/node by

There isn't any way on Linux to deal with processes that create dirty pages. It is folly to try. The only way to deal is to put I/O stuff on a whole box/node by itself, and outlaw block I/O on all other nodes.