与其他的硬件复制技术一样，在主动复制时，尽管备份节点上的IASP是不可访问的，但是节点本身对于完成其他工作是可访问的。

AS with the other hardware replication technologies, although the IASP is not accessible on the backup node while its actively replicating, the node itself is available to do other work.

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实际上，您可以将按照类型查找子节点的操作视为可封装在访问者自身中的访问者操作。

In fact, you can think of finding children on a per-type basis as a visitor operation that can be encapsulated in a visitor itself.

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MongoDB还带有交互式shell，这使得访问其数据存储变得简单，且其对于分块的即装即用的支持能够使高可伸缩性跨多个节点。

MongoDB also comes with an interactive shell that makes accessing its datastore refreshingly easy, and its out-of-the-box support for sharding enables high scalability across multiple nodes.

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