通常关注的因素有:
1)与同城的两个数据中心保持一定距离,确保任意一个数据中心的中心级意外事件不会影响到第三站点;
2)根据容灾方式和仲裁方式,应该保证数据带宽和规范内的通信延迟,例如:
在SVC Stretched Cluster的同城双活中,对第三方站点的要求是:
Quorum disk storage controllers must be Fibre Channel or FCIP-attached. They must be able to provide less than 80 ms response times, with a guaranteed bandwidth of greater than 2MB.