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Test connection to a database server.
Args:
db_type (str): Database type (mysql, mariadb, postgresql)
host (str): Database host
port (int): Database port
username (str): Database username
password (str): Database password
database (str): Database name
Returns:
bool: True if connection successful, False otherwise
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Perform MySQL/MariaDB backup using mysqldump with optimized parameters.
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db_conn (DatabaseConnection): Database connection object
temp_file (str): Path to temporary file for backup
Returns:
bool: True if backup successful, False otherwise
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Perform PostgreSQL backup using pg_dump with optimized parameters.
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Returns:
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Run a backup job.
Args:
job (BackupJob): Backup job to run
send_email (bool): Whether to send email notification
Returns:
bool: True if backup successful, False otherwise
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