现在您就已经拥有了处理主节点故障(如果它会发生)所需要的所有组成部分。
You should now have all the components necessary to handle a failure of the master node, if it should occur.
在主站点发生故障时，PPRC可用于提供快速数据恢复。
PPRC can be used to provide fast data recovery after failure of the primary site.
当检测到故障时，存储的所有关系从主系统转移到辅助系统。
When a failure is detected, ownership of the storage is moved from the primary system to the secondary system.
演示中使用该工具模拟主服务器上的一个故障，并切换到备用服务器。
This tool is used in the demonstration to simulate a failure on the primary server and make a switch to the secondary server.
在这个实现中，heartbeat检测到主节点上的故障并通过以下步骤启动失效切换。
In this implementation, heartbeat detects a failure with the primary and then initiates failover by.
安全服务器(主服务器和故障转移服务器)。
这仍然可能丢失数据(例如，如果两个节点都发生故障)，但是主节点故障不会引起数据丢失，因为数据已经被复制了。
It's still possible to lose data (for example, if both nodes failed), but failure of the primary node will not cause data loss, because the data has been replicated.
如果在主站点发生站点故障，那么就会调用一个故障转移以便事务可以在目标站点上针对此数据库运行。
When a site failure occurs on the primary site, a failover is invoked so that transactions are run against the database at the target site.
在此情况下，故障转移将涉及到在辅助节点上启用别名，并在主节点上禁用它。
In this case, the failover would involve enabling the alias on the secondary nodes and disabling it on the primary.
在这个错误场景中，节点之间的通信链发生故障，每个节点都认为自己是主节点。
In this error scenario, the communication link fails between the nodes, and both nodes believe that they are the primary node.
在主节点发生故障时，冗余节点可以接管。
Upon failure of the primary node the redundant node takes over.
当故障区域重新上线时，主数据网格和副本数据网格通过目录服务在所有可用区域之间重新分布，从而最大化高可用性。
When the failed zone comes back online, the primary and replica data grids are redistributed among all of the available zones by the catalog service to maximize high availability.
如果原始分区(主分区)出现故障，将把它的一个副本提升为新主分区，然后在其他地方创建一个新副本。
If the original partition (the primary partition) fails, one of its replicas is promoted to become the new primary, and then a new replica is created somewhere else.
当主服务器发生故障时，系统将故障转移到只读模式，直到将其中某个辅助服务器升级为主服务器。
When the master fails, the system falls back to read-only mode until one of the secondary servers is promoted to a master.
您可以在多个机器上配置安全服务器，以支持主服务器和故障转移服务器。
You can configure the security server over multiple machines to allow for both primary and failover servers.
执行磁盘的故障转移以便数据库处理能够在主站点继续，如清单18所示。
Perform the disk failover such that database processing can continue at the primary site, as shown in Listing 18.
初始化磁盘故障恢复以便磁盘现在从主站点镜像到目标站点，以防将来主站点有任何故障会发生，如清单20所示。
Initiate disk failback such that the disks are now being mirrored from the primary site to the target site, in case any future primary site failures occur, as shown in Listing 20.
SSL协议用于在安全服务器和每个代理、主服务器和每个故障转移服务器之间进行通信。
SSL protocol is used for communicating between the security server and each agent, and between the primary server and each failover server.
如果主应用服务器出现故障，故障将自动转移到备份服务器。
The application servers will automatically fail over to backup servers should the primary fail.
因此，您还需要延长主服务器、故障转移服务器和代理的 X.509证书的有效期。
Therefore you also need to renew the X.509 certificates for the primary server, the failover servers, and the agents.
在故障转移过程中，数据源从主系统移动到辅助系统。
In the failover process, the data source is moved from the primary to the secondary system.
如果主中央管理器出现故障，那么备用的中央管理器就会成为中央管理器。
If the primary central manager fails, the alternate central manager then becomes the central manager.
设置了一个故障转移连接，用于将更新的应用程序自动从主站点切换到备用站点。
A fail-over connection is set up for automatic switchover of updating apps from primary to standby.
若主站点故障，就执行清单11内所示的磁盘故障转换以便目标站点上的数据可被用来继续进行目标站点上的数据库处理。
Upon failure of the primary site, perform the disk failover as shown in Listing 11 such that the data on the target site can be used to continue database processing at the target site.
该解决方案将一个额外的DB 2服务器用作备用服务器，它在主服务器出现故障时接管其工作。
This solution involves using an additional DB2 server as a stand-by that can take over operations when the primary has to go down.
当主系统出故障时，连续日志恢复特性使一个辅助系统可用，以替代主系统。
In case the primary system fails, the continuous log restore feature makes a secondary system available to replace the primary system.
故障转移是主系统在计划内或计划外的关闭，并包括完成将备用节点置于在线以接管处理负载的任务。
Failover is the planned or unplanned shutdown of the primary system and includes the accompanying task of bringing a standby node online to take over the processing load.
如果主系统出故障，可以将剩下的可用逻辑日志恢复到辅助系统上，然后使后者上线，担任新的主系统。
If the primary system fails, the remaining available logical logs can be restored on the second system, which can then be brought online and function as the new primary system.
如简介所述，您可以配置故障转移服务器，以在主安全服务器发生故障时接管其工作。
As mentioned in the introduction, you can configure failover servers that can take over in the event of a failure of the primary security server.
如果是主服务器加后备服务器的情况，当主服务器关闭时，故障转移中介可以将它映射到后备服务器。
If it's a primary and backup scenario, the failover mediator can map it to the backup server in case the primary server goes down.
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