Requirements for HADR environments.
HADR环境的需求。
Step 6: Update the HADR configuration parameters.
步骤6：更新HADR配置参数。
Later, it is decided to switch the database to HADR-enabled DB2.
后来，决定将数据库切换到启用HADR的DB2。
The failover operation for HADR can be automated using HA software.
HADR的故障转移操作可以通过HA软件实现自动化。
The primary and standby database name for the HADR setup is jsbmain.
这个HADR设置的主数据库名和备用数据库名是jsbmain。
Configure the HADR variables for each database on the primary machine.
为主要计算机上的每个数据库配置HADR变量。
HADR provides for synchronous replication of all logged DB2 operations.
HADR提供所有被日志记录的DB 2操作的同步复制。
A DB2 HADR scenario consists of two DB2 systems, a primary and a standby.
一个DB 2HADR场景由两个DB 2系统组成，一个是主系统，一个是备用系统。
If using by reference, communication ports for HADR need to be specified in.
如果通过引用方式使用HADR功能，则需要指定HADR的通信端口。
DB2 HADR also increases availability by allowing you to perform rolling upgrades.
DB 2HADR还允许执行滚动升级，从而增加了可用性。
You could also mingle automatic client reroute technique with the HADR databases.
您还可以混合使用自动客户端重新路由技术与HADR数据库。
Figure 5 illustrates the HADR processes synchronizing a primary and standby system.
图5演示了同步主系统和备用系统的HADR过程。
Let's look at what is involved in setting up the DB2 HADR primary and standby servers.
现在我们将了解，在设置DB 2HADR主要服务器和备用服务器时都涉及哪些内容。
Now, since you are done with the entire HADR setup, verify whether it is really working.
现在，已经完成了HADR设置，就应该检查它是否能够正常工作。
Detailed below are the steps to successfully configure DB2 HADR on a TSA cluster domain.
下面详细描述在tsa集群域中成功配置DB 2HADR的步骤。
For example, the HADR feature in DB2 V8.2 allows you to select three levels of data protection.
比如，V8.2中的HADR功能允许您选择三种级别的数据保护。
Issue the following commands on the standby server for a DB2 HADR takeover to occur (Listing 9).
向备用服务器发出以下命令，以便发生DB 2HADR接管(清单9)。
If any of these parameters are empty or misconfigured, DB2 HADR servers will not start properly.
如果这些参数中任何一个参数为空或者配置不正确，DB 2HADR服务器都不会正常启动。
For example, a DB2 HADR (High Availability Disaster Recovery) cluster can be set up in the cloud.
例如，可以在云中建立一个DB 2HADR(高可用性灾难恢复)集群。
If the primary and standby databases are not identical when HADR is started, an error will occur.
在启动HADR时，如果主和备用数据库不相同，就会发生错误。
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。
Check the required HADR variables below (see Listing 3). They must be correct and cannot be empty.
检查下面所需的HADR变量(参见清单3)这些变量必须正确而且不能为空。
Setup and administration of HADR is very simple and DB2 provides a wizard to help with these tasks.
HADR的设置和管理非常简单，DB 2提供向导帮助完成这些任务。
Support has also been added for Highly Available (ha) databases, including DB2 HADR and Oracle rac.
还添加了对高可用性(HA)数据库(包括DB 2HADR和Oracle rac)的支持。
SQL30081N A communication error has been detected when starting HADR on the primary or standby machine.
SQL30081N在主要计算机或备用计算机上启动HADR时检测到通信错误。
Connect to the standby database and start HADR on the standby server by executing the start HADR command.
连接备用数据库，执行STARTHADR命令在备用服务器上启动HADR。
Assign appropriate values to the HADR configuration parameters for both the primary and the standby database.
给主和备用数据库的HADR配置参数设置适当的值。
Once the databases are in peer mode, the DB2 HADR servers on the primary and standby machines are ready for use.
在数据库处于对等模式之后，主要计算机和备用计算机上的DB 2HADR服务器就准备就绪可供使用了。
Only data changes are required to be replicated, so read transaction are unaffected by the implementation of HADR.
由于只需复制被更改的数据，所以读事务不受 HADR实现的影响。
If there are two network interfaces on each host, a private network can be set up exclusively for HADR replication.
如果每个主机上有两个网络接口，可以设置专门的网络用于hadr复制。
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