这里要清楚的一个问题是，在进行预订时，必须保持数据库同步，或者为预订系统创建一个单独的进程。

One issue to be aware of is that you must keep databases synchronized when bookings are made, or create a separate process for the reservation system.

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创建了本地副本和目录编目后，必须将其设置为使用这些数据库的服务器副本进行复制，以便保持同步修改。

After a local replica and directory catalog are created, they must be set to replicate with the server replicas of these databases to keep changes synchronized.

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共同的思路是我们为消息传递实现的安全模型需要与我们使用消息传递的方式保持同步。

The common thread is that the security models we implement for messaging need to keep pace with the ways in which we use messaging.

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