Just add BATCHSIZE at the beginning of your sql backup script.

Below is an example, a backup script which backs up every database inside MS-SQL ($ALL) to 2 tapes.

BATCHSIZE 2
OPERATION BACKUP
DATABASE $ALL
SQLHOST “BIZTALKSQL1″
NBSERVER “VERITAS”
MAXTRANSFERSIZE 0
BLOCKSIZE 0
POLICY BiztalkSQL1
NUMBUFS 2
ENDOPER TRUE

Keep in mind, you must adjust your maximum jobs per client configuration on your system if needed…

Reference: http://www.symantec.com/docs/TECH18392

Checklist

1. Check that netbackup client is installed on the sql server.

2. Check operating system (which windows version?)

3. Check that there is enough disk space where you will be installing netbackup client.

4. Check that netbackup server can reach client, and the client can reach to netbackup server, by resolving their names and IP addresses.

Howto

First of all, you need to create a backup script on the client server (ms-sql server). Enter required paramaters (eg: database username/password) and select the databases to backup. Then save this as a file (do not select backup option, select save option) in the directory c:\Program Files\Veritas\NetBackup\DbExt\MsSql

This directory is important as netbackup will try execute backup scripts inside this directory.

On the Netbackup administration console:

1.Create a new policy, choose “MS-SQL” as the policy type and select policy storage unit and volume pool according to your needs.

Create a new policy

2. After “MS-SQL” is selected as policy type, a schedule named “Default-Application-Backup” schedule is added automaticaly.

Default-Application-Backup Schedule

3. Create a new schedule with policy type “Automatic Backup” and configure according to your needs.

Create a new Application Backup schedule

4. Your schedules will look like below.

MS-SQL Schedules

5. Add your sql server as a new client and select operating system if necessary

Add your client (Sql Server)

6. Add backup script from the client (Backup script recorded on sql server) as a new backup selection.

Add Backup script

7. Click OK and start a new Manual Backup to test your policy. Keep in mind that, every database will be backed up  using Default-Application-Backup schedule, everytime called by Application Backup schedule.

MS-SQL Backup Activity