How does it work?
SHA combines two Synology NAS servers into one high-availability cluster (or HA cluster). One server assumes the role of active server, while the other becomes a standby passive server. The active server handles all data requests and services, while everything is continuously replicated to the passive server. This provides a complete hardware and data redundancy solution in case of unforeseen accidents. Watch the video to learn more about SHA. See more videos from Synology
With the real-time data mirroring mechanisms, all the data that is successfully written to the hard disks of the active server is replicated to the passive server in real time. This data synchronization ensures that in the event of hardware failure, all replicated data can be accessible soon after.
The two servers communicate via a Heartbeat connection. When the active server becomes unavailable, the passive server automatically kicks in to ensure file services and applications can be recovered within minutes. The smooth transition maximizes service uptime to help businesses achieve service continuity.
Robust HA solution
Highly available application server
Intuitive application serving is an essential part of the Synology experience. Whether it's file services, web service, or Cloud Station, most Synology packages and built-in services are compatible with SHA to maximize uptime when hardware failure occurs. Learn more about other features
The user-friendly design reduces the effort required for setting up a powerful HA cluster. The quorum server further enhances the stability when the passive server needs to take over the services.
Hassle-free installation and maintenance
Quorum server ready
The intuitive user interface makes SHA super simple to set up and get running. With its handy, built-in management tools, you can easily monitor the HA cluster and perform maintenance, without needing to acquire additional technical knowledge. Learn how to set up an SHA configuration
The timing for the passive server to take over the main operation is critical. Quorum Server plays the key role in reducing the occurrence of split-brain effectively, thus maximizing service continuity and data consistency.