SD备用服务器中的检查点是同步的。
备用服务器中的输出应该像下面这样。
The output in the standby server should be similar to one shown below.
备用服务器上执行的只读事务
活动服务器不向备用服务器传输邮件信息。
The active server does not transfer mail messages to the standby server.
活动服务器将所有数据库复制到备用服务器。
The active server replicates all databases to the standby server.
在备用服务器(Node3)上执行以下命令。
Execute the following command at the standby server (Node3).
在所有测试中，备用服务器有2个集群复制器。
The standby server had two cluster replicators in all tests.
向集群添加rs备用服务器。
活动服务器的负载将被复制到所有其他备用服务器。
The active server then replicates to the rest of the standby servers.
活动服务器的负载将被复制到所有其他备用服务器。
The active server then replicated to the rest of the standby servers.
tsa集群域和备用服务器通过专用线路链接在一起。
The TSA cluster domain and the standby server are linked together through leased lines.
在需求再次回落之后，可以释放备用服务器以作他用。
After the demand slows down again, the spare servers are freed up for other purposes.
在11.1中，备用服务器只允许应用程序读取数据。
In 11.1, the secondary servers only allowed applications to read data.
该设置决定备用服务器何时将确认发送到主服务器。
This setting determines when the secondary server sends an acknowledgement to the primary server.
不过，备用服务器信息将仅存储在JDBC驱动程序端的内存中。
However, the alternate server information will only be stored in memory on the JDBC driver side.
在备用配置中，备用服务器在等待生产服务器发生故障时是空闲的。
In a standby configuration, the standby server will be idle while it waits for the production server to fail.
在下面的图表中，服务器1为活动服务器，服务器2为备用服务器。
In the charts that follow, server 1 was the active server and server 2 was the standby server.
可以在您方便的时候运行备用服务器，确保流程的这个部分符合期望。
You can run the alternate server at your convenience to make sure this part of the process works as expected.
当在两个服务器上都启用事务日志时，备用服务器上的资源使用稍微增加。
The resource utilization went up slightly on the standby server after transaction logging was enabled on both servers.
DB 2服务器会自动将日志变更从主服务器传递给备用服务器。
The DB2 server would automatically relay log changes from primary to its stand-by server.
向备用服务器发出以下命令，以便发生DB 2HADR接管(清单9)。
Issue the following commands on the standby server for a DB2 HADR takeover to occur (Listing 9).
用于ACR的备用服务器信息是在数据库服务器上指定的一个参数。
The alternate server information for ACR is a parameter designated at the database server.
当主要服务器脱机时(计划内或计划外停机)，备用服务器将联机代替其工作。
When the primary server goes offline for (planned or unplanned) downtime, the standby server is available to be brought online.
在最简单的情况下，每台服务器配备一台备用服务器，用于故障恢复。
In the simplest case, a server is paired with a backup that serves as the failover target.
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.
因为这个例子使用备份恢复HDR备用服务器，因此只需要块文件和适当的权限。
Since this example USES the backup to restore the HDR secondary server, it is only necessary that the chunk files exist and have the proper permissions.
连接备用数据库，执行STARTHADR命令在备用服务器上启动HADR。
Connect to the standby database and start HADR on the standby server by executing the start HADR command.
主服务器的日志写入和对于备用服务器的发送在主服务器上是并行执行的。
The log write at the primary and the send to the standby are performed in parallel on the primary server.
当检测到通信错误时，ACR轮流尝试到原始服务器和备用服务器的连接。
When a communication error is detected, ACR alternates connection attempts to the original and alternate servers.
因此，所有三个备用服务器类型都可用于增加主服务器的容量并平衡负载。
Thus, all three secondary server types can be used to increase the capacity of your primary as well as balance the load.
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