对于第二次故障，情形1：如果A出现故障，它将被转移到空闲节点上。
For the second failure, case 1: If a fails, it is placed on the spare node.
系统闭环故障仿真试验研究表明，系统二次故障具有无痕切换能力，验证了系统设计的合理性和高可靠性。
Simulated experiment in closed-loop shows the system has no marking transient as appearing twice fault and that the redundancy design is rational and reliable, which will get a wide field of aviation.
我们的解决方案将采用一种算法（协议）来适应高可用性集群中应用程序（或节点）的第一次和 第二次故障。
Our solution was to come up an algorithm (protocol) to accommodate a first and second failure of application (or nodes) within the highly available cluster.
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