但用这种方式进行Oracle数据库的镜像,却存在一个潜在问题:无法保证写操作顺序的一致性(write-order consistency),导致出现数据坏块的可能性增大。最坏情况,可能导致备份数据库无法打开。
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weak order consistency model 弱一致性模型
r order mean consistency r阶矩收敛性
r-order mean consistency r阶矩收敛
Order cycle time & consistency 订货周期及一致性
Consistency of the run data only exists when the snapshot of the data is write order consistent.
只有数据快照实现了写入顺序一致,才能保证运行数据的一致性。
Architects typically reuse patterns identified from external sources, and also define their own patterns to be used on the project, in order to ensure some level of architectural consistency.
为了确保一些构架一致性水平,构架师主要对从外部来源的模式进行重新利用,同时还定义应用在这个项目中的他们自己的模式。
Well-designed ERP, supply chain, and procurement systems bring order and consistency even to large and distributed companies.
即使在大型,分布式的公司,设计得优秀的ERP,供应链,采购系统也能带来秩序和一致性。
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