Clustering and the complexities of provisioning reliable high-bandwidth connectivity to remote data centers understandably increase the cost and staffing requirements to build, maintain and periodically test disaster recovery systems.

• 向远程数据中心提供可靠的高带宽连接是很复杂的,再加上群集,无疑会增加建立、维护和定期测试灾难恢复系统的成本,并会提出更高的人员要求。