The primary database will be MySQL for the addition of a new application server.
主数据库为 MySQL ，以添加新的应用服务器。
This cell contains the most recently retrieved value for the primary database key.
此单元格含有数据库主关键字的最近检索值。
Once mounted, the database can receive archived redo data from the primary database.
一旦数据库装载后，数据库就能从主库接收归档重做日志。
The client connects to the primary database using the public network using a virtual IP address.
客户端使用一个虚拟ip地址，通过公共网络连接到主系统数据库。
Connect to the primary database and start HADR on the primary server with the start HADR command.
连接主数据库，执行STARTHADR命令在主服务器上启动HADR。
Similarly, you can drop log file groups or members from the primary database without affecting your standby database.
同样的，你可以在主库删除日志文件组或成员而不影响你的备库。
Failover does not occur automatically, since WebSphere Application Server still has a connection with the primary database.
故障转移不会自动发生，原因是WebSphereApplicationServer仍然存在与主要数据库的连接。
You can add or drop online redo log file groups or members to the primary database without affecting the standby database.
你可以在主库添加或删除在线重做日志组或者日志成员而不影响备库。
You will need to wait until the standby database makes a connection with the primary database to get both databases in peer mode.
您需要等待备用数据库连接到主要数据库之后，才能使两个数据库处于对等模式。
On the primary machine, first activate the database and then issue the start hadr command to start it as the primary database (Listing 8).
在主要计算机上，首先激活数据库，然后发出starthadr命令将其作为主要数据库启动(清单8)。
To take advantage of HADR, you must have two dedicated servers available: one for the primary database and one for the standby database.
要想使用 HADR，必须有两个专用的服务器：一个用于运行主数据库，一个用于备用数据库。
The possible cause of this problem is that the primary database failed to establish a connection to its standby within the HADR timeout interval.
此问题的可能原因是，在hadr超时间隔内主要数据库无法建立与其备用数据库的连接。
When a physical standby database is open, redo data from the primary database is received by the standby database, but the log files are not applied.
当物理备库是打开时，来自主库的重做数据被备库接收，但是不会被应用。
This thesis expounds current primary database, data warehouse optimization theory, decision trees and decision support systems critical technologies.
本论文中论述了当前主要的数据库、数据仓库优化理论和决策支持系统的关键技术。
Asynchronous: Committing a database change on the primary database is not held up in any way by the communication of log records to the standby database.
Asynchronous：并不以任何方式推迟提交主数据库上的数据修改，日志记录异步地传输给备用数据库。
Whenever you add an online redo log file to the primary database, you should add corresponding online and standby redo log files to the standby database.
无论何时，你在主库添加在线重做日志文件，你应该在备库添加相应的在线重做日志和备用重做日志文件。
If a complete site failure occurs at the primary site, data availability is maintained by having the remote standby database take over as the primary database.
如果主站点发生全站点事故，远程备用数据库会接替主数据库，从而保持数据可用性。
Execute the following commands on the database of the active node of the cluster (Node1 in this case) to make this database the primary database for the HADR setup.
在集群的主动节点(在这个示例中是Node1)的数据库上执行以下命令，让这个数据库成为HADR设置的主数据库。
For example, the primary database might be located at one data center in one city, while the standby database might be located at another data center in another city.
例如，主数据库可以放在一个城市的数据中心中，而备用数据库放在另一个城市的数据中心中。
At some point, you need to resume redo apply on the standby database, and apply the archived redo log files to resynchronize the standby database with the primary database.
在有点伤，你需要在备库上重新应用重做数据，应用归档日志来同步备库和主库之间的数据。
The table must match the definition of your attributes; for example, the primary database key for the equations table must be the primary key of the Persistent class as well.
表必需与属性定义匹配，例如，等式表的主数据库键必须也是 Persistent类的主键。
A split mirror of a DB2 UDB database can also be initialized as a warm standby database, providing a quick disaster recovery option if the primary database becomes unavailable.
DB 2UD b数据库的分割镜像可以被初始化为一个热备用数据库，当主数据库不可用时，可提供一个快速的灾难恢复选项。
Automatic client Reroute is a DB2 feature that redirects client applications from the primary database to the standby database immediately after a failover operation is performed.
在执行故障转移(failover)操作之后，AutomaticClientReroute这个DB 2特性立即把客户机应用程序从主数据库重定向到备用数据库。
The third node (Node3) in this topology consists of the disaster recovery site existing in a remote location and hosting the standby database for the primary database mentioned earlier.
这个拓扑结构中的第三个节点(Node3)由远程位置上的灾难恢复站点组成，它托管前面提到的主数据库的备用数据库。
Section 12.6for a scenario that describes activating a physical standby database as a read/write reporting database, and then resynchronizing the database with the primary database.
第12.6节的场景，描述活动的物理备用数据库为读/写报告数据库，然后与主数据库重新同步数据库。
Once you configured the primary and standby databases through various database configuration parameters and restored the primary database at the standby location, you could start HADR function.
在通过各种数据库配置参数配置了主备数据库并在备用位置恢复了主数据库之后，您就可以启动hadr函数了。
Applications that encounter an outage at the primary database don't expose this problem to the end-user; rather, the application will switch to a cataloged secondary server and issue a reconnect.
在主数据库遭遇中断的应用程序不会将该问题暴露给终端用户，而是切换至备用服务器并重新发出连接。
Applications that encounter an outage at the primary database don't expose this problem to the end-user; rather, the application will switch to a cataloged secondary server and issue a reconnect.
在主数据库遭遇中断的应用程序不会将该问题暴露给终端用户，而是切换至备用服务器并重新发出连接。
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