When HA is required, here’re some technologies useful.
Active/Active configuration:
Dual controller with interconnecting, all of settings, volumes, IPs will failover to another controller seamless when one of the controllers is failed.
Before DataOnTAP 7.2, A/A configuration is also called a Cluster.
SyncMirror:
A mirrored aggregate by creating two plexes with double the number of total disks.
SnapMirror:
Incremental backup by using the snapshot technology. There’re three type of SnapMirror:
- Asynchronous SnapMirror
- Synchronous SnapMirror
- Semi-synchronous SnapMirror