What determines the order files(systems) get backed up?

[Sheldon Knight]

Hi,

I am using amanda 4.2P2 and would like to be able to influence the order
files are backed up to tape.  I would prefer largest files first.  This
would assist in increasing the usage of the tape and if more than one tape
was required small files would remain to be backed up rather than  a large
file being backed up, failing and then being rewritten to a new tape --
which takes a long time.  Is there some way of configuring the planner to do
this?

TIA
Sheldon