| 摘要 |
PROBLEM TO BE SOLVED: To provide provisioning and management of replicated data instances.SOLUTION: A replicated database instance is provisioned that provides primary and secondary replicas that can be provisioned in different data zones or geographical locations. The database can be installed on the primary replica, and both the primary and secondary replicas have an installed block level replication mechanism that allows any I/O operation to be replicated between the primary and secondary replicas. Any failure or outage of the primary replica can be coped with by performing a failover operation to the secondary replica. An approach such as a DNS name is used to alias the DNS name to the secondary replica during a failover. Therefore, a customer does not need any special action in utilizing the "new" primary replica. Creation of the database and provisioning of the replicated instance are initiated using a Web service call to a control environment. |
