Database mirroring offers a substantial improvement in availability over the level previously possible using Microsoft SQL Server and provides an easy-to-manage alternative or supplement to failover clustering or log shipping.

• 数据库镜像对可用性的提高程度远远大于先前使用Microsoft SQL Server对可用性的提高,并为故障转移群集或日志传送提供了易于管理的替代或补充。