# Overview The ability for a system to be running and provide functionality. It does not take into account the 'accuracy' of the system. Availability typically comes at the cost of [[Consistency]], so the available data may not be the most recent to enter the system. # Key Considerations # Implementation Details Availability is improved in a system through a variety of approaches. ## [[Redundancy]] via [[Database Replication]] Create copies of the data. If one copy of the data becomes unavailable, use an alternative copy of the data. # Useful Links # Related Topics ## Reference #### Working Notes #### Sources