Local Redundancy
Local Redundancy is a fault tolerance strategy in computing and data storage where duplicate components, systems, or data are maintained within the same physical location or data center to ensure high availability and reliability. It involves creating backups or replicas that can immediately take over in case of hardware failures, software errors, or other disruptions, minimizing downtime and data loss. This concept is fundamental in designing resilient IT infrastructures, particularly for critical applications that require continuous operation.
Developers should implement Local Redundancy when building systems that demand high uptime, such as financial services, healthcare applications, or e-commerce platforms, where even brief outages can lead to significant revenue loss or safety risks. It is especially crucial in on-premises or private cloud environments where geographic redundancy might be impractical or too costly, providing a cost-effective way to enhance reliability without relying on external data centers. Learning this concept helps in designing architectures that balance performance, cost, and resilience, often using technologies like RAID arrays, clustered servers, or database replication.