Barracuda Networks 4 - Manual (Page 27)

Configuring Backups 25
Step 3: Create Backup Schedules
Now that you have configured your computers and data sources, you can create backup schedules,
either individually or for all sources. If no schedule is created for a data source then it will not be
backed up.
To create a backup schedule, go to the BACKUP > Schedules page of the Barracuda Backup Service
Web interface. Click Add a Schedule and fill in the information on the Add Backup Schedule page
If the backup schedule is for Microsoft SQL or Microsoft Exchange, you must specify the type of
backup to run:
• Full – This backup type performs a full backup of data, including the transaction logs.
• Log – This backup type only backs up the transaction logs which have been created since the
last full backup.
• Smart – This backup type is a combination of the full backup and the transaction log backup.
Barracuda Networks recommends this backup type for SQL and Exchange servers.
With the Smart Backup type, threshold values are used to determine when to switch between full and
log backups. The minimum threshold value specifies how many days the Barracuda Backup Service
continues to back up transaction logs before another full backup is run. After the minimum threshold
value is met, the Barracuda Backup Service determines whether to perform another backup based on
the binary data queue. If the binary data queue size exceeds 1 GB, the Barracuda Backup Service
continues the transaction log backup until:
• the maximum threshold level is met, or
• the queue size drops below 1 GB.
Step 4: Create Data Retention Policies
Configure retention policies for data stored on a Barracuda Backup Server on the BACKUP >
Retention Policies page. Be sure to configure retention policies for your data. Not doing so means
that some unwanted data will be moved across the Internet and stored, causing unnecessary expense.
Data is retained based on a traditional grandfather-father-son (daily-weekly-monthly) rotation model.
You can specify how long to keep daily, weekly, monthly and yearly backups by creating data
retention policies. Multiple retention policies can be created for files, data backed up by the Barracuda
Backup Agent (Exchange, SQL, System State), and email messages.
There are some template policies provided to assist you in creating your own retention policies. You
can create one policy for all of the computers and data sources on a Barracuda Backup Server or
multiple policies that each include some subset of the data.
When data is removed according to a retention policy, it is deleted from both the local Barracuda
Backup Server and the offsite storage locations. Removed files that have been backed up using
Network File Shares Protocol or SSHFS may be retained for a longer period of time, according to the
configuration. Otherwise, once your data has been purged, it is gone forever. Purging applies to
historic file revisions only; your current data will never be impacted by a retention policy.