However, as her clinical course was compatible with H5N1 infection, epidemiologists at the outbreak site include this woman as the initial case in the cluster.
The problem with this is that the disaster recovery site needs to hold the current state of the cluster in order to be immediately useful during a failover.
这种方法的问题在于灾难恢复站点需要储存集群的当前状态，以在故障转移期间立即可用。
3
To optimize the use of machines and to maintain ha, we designed for a four-node cluster at each site: one node per application and a spare node that will serve as the failover node.