An Architecture Pattern for Multi-Cloud High Availability and Disaster Recovery

Abstract. High availability and disaster recovery (HADR) are often discussed in highly critical business systems for business function recov-ery and continuity concerns. With the development of cloud computing, virtual cloud services are perfectly matched to HADR scenarios, and interoperability is a significant aspect to help users to use HADR ser-vice across different cloud platforms and providers. In this paper, we present an architectural pattern describing the integration of high avail-ability and disaster recovery. We focus on database cluster replication between private cloud and public cloud environments. This HADR pat-tern for database cluster replication implements both synchronous and asynchronous replication concurrently for high availability and disaster recovery purposes. To evaluate the effectiveness of this pattern, we sim-ulate a MySQL-database-cluster HADR scenario under three strategies: hot standby, warm standby and cold standby, and analyze the perfor-mance, business continuity features and cost