Maintenance plans can be used to create a workflow of the maintenance tasks required to make sure that your database performs well , is regularly backed up in case of system failure , and is checked for inconsistencies 维护计划可用于创建所需的维护任务工作流，以确保数据库运行良好，在出现系统错误的情况下定期备份数据库，以及检查是否存在不一致。
If a non - web service entity is subscribed , the producing web service creates a publisher to distribute system error messages to the entity through a separate brokering web service that provides broker services 如果订阅了一个非web服务实体，则生产web服务会建立一个发布者，此发布者透过一个提供代理服务的单独代理web服务将系统错误讯息分发给这个实体。
As you saw , the paradigm begins with the subscriber subscribing to a consuming web service - human - facing or internal - to receive notifications on , for example , system error or threshold warning topics 正如您所看到的，此范例首先显示了订阅者正在订阅一个消费web服务面对人的服务或内部服务以便接收通知，如系统错误( system error )或者临界值警告( threshold warning )主题。
For instance , if middle management has an identified responsibility to ensure the operation of an incident reporting system then it is possible to place any causal factor that relates to the failure of such a system at this level in a tier diagram 这些原则是由判断应用流程作业的安全事件所得来。例如：如果中阶管理者有责任确保事件通报系统的作业，那么可能会放置任何与系统错误相关的因果要素在层叠图中。
As part of disaster tolerance , heartbeat technology is used to detect system failures and do appropriate response , the performance and accuracy of heartbeat have great effect on service of disaster tolerance , so heartbeat has become a necessary part of disaster tolerance technology 心跳技术作为一种容灾技术其主要功能是检测系统错误并做出适当的反应,心跳检测的性能和准确率对容灾系统提供的服务有很大影响,已经成为容灾技术不可缺少的一方面。
In theory , disaster tolerance technology includes heartbeat detection technology and many other technical means , such as two module backup , computer cluster , storage area network , etc . in computer systems , when human operation failure occurs , system error occurs , or even physical attack , lack of power , flood and other disaster occur , disaster tolerance technology can prevent system from losing data , meanwhile , provide high availability service 从范畴上讲,容灾技术包括心跳检测技术在内的许多技术手段,如双机热备份,计算机集群,存储区域网络等。在计算机系统发生人为失误,系统错误,甚至受到外来打击或者遭到停电,洪水等灾难性的破坏时,容灾技术仍能使系统在少损失数据甚至不损失数据的情况下对外提供高可用不间断或间断时间很短的服务。
