A session is the time from when no backups are running and one or more
backups start, to the time that no backups are running.  So if you
have a class scheduled to start at 4:00 and another at 5:00, you can
not say whether this is one or two sessions just based on this
information.

If the db backup is active, backup jobs will queue.  I'm not sure what
happens if you launch a db backup (say via cron) during other backups.

If you don't backup a media server, you risk losing the license keys,
enhanced authorization data, device configuration, mediaDB, etc.

The storage unit (in NetBackup terminology) is configured on the
master.  The physical device configuration lives on the media server.
But, just because you only configure certain things on the media
server doesn't mean that NetBackup doesn't store other things there
which need to be protected.

HTH,
L

Sixbury, Dan writes:
> If you have NetBackup Database backups scheduled to run after each session
> of scheduled backups,  
> 1. Is NetBackup smart enough to queue the NB DB backup between other backups
> that are scheduled?  
> 2. If the NetBackup DB backup tries to run while another backup is running,
> does the NB DB backup wait in queue or does it fail, or does it run and if
> it runs does this mean that it is an invalid backup?
> 
> I have typically scheduled the NetBackup database backups from cron and used
> the command line options to backup the database at a time that I know other
> backups are not running.  I just want to know what happens when other
> backups are running or get queued to run how NetBackup handles those
> situations.  Especially how NetBackup handles the "after each session of
> scheduled backups".  The other thought here is that if we have multiplexing
> and multiple schedules, we could have 4 different backups running and each
> ending at a different time with no period of inactivity between start and
> finish of the four backups.
> 
> So far as Media servers.  If you keep all of the volume database information
> on the master server, what does the media server provide that needs to be
> backed up?  I thought that the only thing that should be configured on the
> Media servers should be the storage unit, and then have all classes, backup
> policies, media pools, etc. configured on the master.  What am I missing if
> one of the media servers doesn't get a NetBackup db backup?
> 
> Thanks,
> Dan
> 

-- 
Larry Kingery 
      Don't use a big word where a diminutive one will suffice.