How do I exclude a database or table from my backup?

By adding a negative database override to /etc/tklbam/overrides:

# exclude drupal5 database
echo -mysql:drupal5 >> /etc/tklbam/overrides

# exclude sessions table in drupal6 database
echo -mysql:drupal6/sessions >> /etc/tklbam/overrides

By default ALL databases are backed up so adding a negative database override override excludes only that database or table from the backup.

By contrast, a positive database override changes the default behavior so that only the database or table specified in the override is included in the backup.

You can mix positive overrides with negative overrides.