HADR

How to Implement HADR for IBM DB2 Database System Under AIX

在AIX系统下如何对DB2数据库实施HADR机制

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

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。

An HADR cluster can function as a hot / hot cluster in multiple ways .

HADR集群可以多种方式作为热/热集群。

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。

In these circumstances , there is little to no impact of running HADR .

在这些环境中，运行HADR时受到的影响很小。

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。

Once HADR is turned off , the primary can continue to process transactions normally .

HADR关闭后，主系统可以继续正常地处理事务。

DB2 HADR also increases availability by allowing you to perform rolling upgrades .

DB2HADR还允许执行滚动升级，从而增加了可用性。

HADR provides for synchronous replication of all logged DB2 operations .

HADR提供所有被日志记录的DB2操作的同步复制。

The overhead of running HADR is very small .

运行HADR的开销非常小。

HADR instance name of remote server

远程服务器的HADR实例名称

A DB2 HADR scenario consists of two DB2 systems , a primary and a standby .

一个DB2HADR场景由两个DB2系统组成，一个是主系统，一个是备用系统。

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。

Examine the HADR ports and names used for each database in the / etc / services file .

在/etc/services文件中检查用于每个数据库的HADR端口和名称。

DB2 High Availability Disaster Recovery ( HADR ) is a high performance database replication system based on DB2 logging mechanics .

DB2HighAvailabilityDisasterRecovery（HADR）是基于DB2日志记录机制的一种高性能数据库复制系统。

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。

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DB2HADR主要服务器和备用服务器时都涉及哪些内容

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。

HADR log write synchronization mode

HADR日志写入同步模式

In this case , you can deactivate the database prior to stopping the HADR

在此情况下，您可以先禁用数据库，然后再停止HADR

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DB2HADR的步骤。

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，DB2提供向导帮助完成这些任务。

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DB2HADR（高可用性灾难恢复）集群。

It is responsible for monitoring entities such as network interfaces , DB2 instances , and HADR databases .

它负责监控如网络接口、DB2实例、HADR数据库这样的实体。

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。

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。

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。

Only DDL copymode is supported for high availability disaster recovery ( HADR ) databases .

对于高可用性灾难恢复（HADR）数据库，只支持DDL复制方式。