Abstract - The need for resiliency and the way it is achieved at both the data center and application levels is expected to change significantly as the IT world gradually moves to a more cloud-based, hybrid and distributed architecture. 混合计算、云计算、容器和虚拟化、DevOps、复制、分布式数据库和全球流量管理 (GTM) 等技术的进步,带来了对数据中心和网络容量方面的巨大投资,也带来了更多地使用软件来智能化管理负荷、流量和弹性的趋势。所有这些都结合在一起,产生了一种架构上的转变:从单站点的垂直弹性到分布式的复制弹性。