Session data must be replicated quickly as a form of backup.

会话数据必须以备份的形式迅速进行复制。

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Furthermore, every change to any session also creates work for every node, because it has to process an incoming update message and make its backup copy of the session consistent with the changes.

而且，对会话的每次变化都会形成对每个节点的操作，因为节点必须处理进来的消息更新，让会话的备份拷贝与变化一致。

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You might use this feature to remove temporary files, copy files as a simple method of backup, or perhaps even launch rsync to distribute any changes made in this most current session.

您可以使用这一特性以删除临时文件、复制文件作为一种简单备份方法、或者甚至启动rsync以便传播当前会话中所做的任何更改。

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