Availability of the system is important for any business. Any time the system is unavailable; there is a loss of productive time. This can happen due to various reasons – For example – Maintenance operations like backup require that all users stop working so that a proper and consistent backup can be taken. This is often managed by doing such operations late at nights or at odd hours. With Tally.Server 9, backup can be taken anytime without affecting either the speed of access for the user or the consistency of data that is backed up. In other words users can continue entering transactions or operating reports while the backup is happening – There is zero downtime for backup.