It is important to distinguish session state from cached state.
将会话状态与缓存的状态区分开很重要。
Cached state can optionally be indexed, allowing the entire grid to be searched.
我们可以对缓存状态加索引，这样就能搜索整个网格了。
We can track the cached state of the client session by using a client cookie. Listing 1 puts it together
通过使用一个客户机 cookie，我们可以跟踪客户机会话的缓存状态。
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