>I would like to know how you can find out how much  data(MB) was backup, and at
>what rate(KB/S) for  filespace(s)  that belong to a backup node.

Not so easy...which makes for an opportunity for those 3rd party software
developers.  The information is in the database, though getting it is tedious.
The Actlog table can be mined for ANE* messages reflecting backups (including
transfer rates), and with that timestamp you can go at the Backups table to
determine the filespace name, and from the filenames gotten there you could
brave the Contents table to get sizes (which records aggregates or filesizes,
whichever is larger).

If this stuff were easy, anyone could do it, and then where would we be as
overpaid technicians?

   Richard Sims, BU