Is there some detailed documentation about how to use and how does it
work?

I'm using it and i still have some doubts:

- If i create an automatic script to run at some regular interval,
does this script have always to inform the required level for the
database?

- If i implement a kind of auto-incremented value for the level
(storing it in a file, for example), let's suppose this script runs,
increment the level and, when calling nbackup, i have some problem and
the backup doesn't happens. Next time it runs, my script level is
greater than the expect database level. Does it means in this case my
script will never run again until i correct the level manually?

- Is there a way to retrieve the current database backup level?

- Is there a way to ask nbackup to use the next level automatically,
without knowing it?

- It seems the level is a information pertinent to each database. Does
it means i need always to run nbackup from the same location (supose i
have a level counter in the machine that does the backup)?

- Does nbackup runs over remote databases?

- This question is not about nbackup itself: My first backup using
nbackup produced a file with the same size of the original database. I
suppose it's a copy and the next files are copies of the changed pages
or something else. Do someone can say how do i use nbackup in
conjunction with tar (in just one command line) to produce a smaller
backup file and save disk space and network traffic? (examples are
welcome, to backup and to restore a database, if possible)

I think it's enought for now. More to come later... :-)

Thanks.