How to use ionice?

[Ed W]

Hi, I need to rsync a remote live server to a local backup machine.  The 
local backup machine is starting the rsync on scheduled basis (ie 
pulling from the remote) and I would like it to reduce the load on the 
remote live server by using nice/ionice at the far end.   I'm connecting 
to the remote machine with ssh

How can I get the remote server to be running it's part of the chain 
nice'd/ionice'd ?

Thanks

Ed W