当一台服务器上发生故障时，该备用适配器就从另一服务器上接管所有连接。
When a failure happens on one server, then this standby adapter takes over all connections from the other server.
另一个服务器是备用成员，因为它的唯一负载是集群复制。
The other server is a standby member because its only load is cluster replication.
右边的服务器(备用服务器)称为“备用”集群成员，因为它的唯一负载就是集群复制。
The one on the right (standby server) is called a "standby" member because the only load on it is cluster replication.
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.
它由一对服务器组成—主服务器和HDR备用服务器—并且同时支持异步和同步复制模式。
It consists of a pair of servers - the primary and the HDR secondary - and supports both synchronous and asynchronous replication modes.
在设置任何高可用性环境时，都需要考虑这一点，在这种环境中，每个服务器互为备用，但是它们必须维持自己的服务水平。
This is something that you need to consider when setting up any highly-available environment where each server backs the other up, but also has its own service level it has to adhere to.
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.
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.
随后，应用程序就知道要转换到备用服务器。
The application then knows to switch to the secondary server.
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.
为了在备用服务器上保持数据库的一个同步副本，系统会一致地将DB 2HADR日志文件从主要服务器发送到备用服务器来保持二者的同步。
To keep a synchronized copy of the database on the standby server, DB2 HADR log files are consistently sent from the primary to the standby to keep the two in sync.
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.
如果到主要DB 2服务器的连接失败，DB 2将从内存中检索备用服务器信息，并将使用该备用服务器信息连接到正确的DB 2服务器。
When the connection to the primary DB2 server fails, DB2 will retrieve the alternate server information from memory and will use that alternate server information to connect to the right DB2 server.
要针对其他移动浏览器显示这个备用登录屏幕，需要向这个设置列表添加一个惟一关键字来识别备用浏览器。
To have this alternate login screen display for other mobile browsers, a unique keyword to identify that alternate browser might be added to this Settings list.
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.
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.
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.
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.
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.
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.
借助冗余服务器，从故障服务器切换到备用服务器的过程称为故障恢复(或热交换)。
With redundant servers, the process of swapping from a failed server to a spare server is called failover (or hot-swapping).
无状态的故障恢复是最简单的方法，但也是作用最有限的方法，因为该方法在故障服务器与备用服务器之间没有维护任何状态。
Stateless failover is the simplest approach but also the least useful approach given that the approach maintains no state between the failed server and the backup server.
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.
确保tsa域中的两个服务器和备用服务器都为DB 2通信启用了TCPIP协议。
Ensure that both servers on the TSA domain and the standby server have the TCPIP protocol enabled for DB2 communication.
处理器应该用备用样式表列表提示用户。
A processor should prompt the user with the list of alternate style sheets.
在异步模式下，只有检查点在主服务器和HDR备用服务器之间是同步的。
In asynchronous mode, only checkpoints are synchronized between the primary and HDR secondary.
同时，主服务器在得知备用服务器已经写入了日志之后，才继续进行下一次日志刷新。
At the same time, the primary server will not proceed on to the next log flush until it receives notification that the standby has written the log.
如果主服务器失败，备用服务器就非常快速地接管工作负载(在大多数情况下，转换时间少于30秒)。
If the primary server fails, the standby can take over the workload very quickly (most cases in under 30 seconds).
启动Server2中队列管理器的备用实例。
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