In the data layer, i2Availability captures production data in real time based on disk mirroring and replicates the data to the DR server; in the application layer, it monitors the operation status in real time and switches the application to the DR server if there is any abnormality(such as abnormal service stop, network abnormality, hardware failure, and system downtime) that causes unreachable business. so as to achieve business continuity through application takeover. This software is suitable for systems with high requirements for business continuity in various industries, such as trading systems of banks and securities companies, hospital critical care systems, ERP/OA systems, manufacturing execution systems, and government cloud platform portals.