按照文件和查询的逻辑形式的预定函数将文件排序。

Documents are ranked as a predefined function of the logical forms from the documents and the query.

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现在增加- s选项，按照size属性对文件排序(参见清单13)。

Now you can add the -s option to sort the files by the size attribute (see Listing 13).

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那些不能被拆分为单个微小更新的计算任务（比如对一个文件排序）仍然最好由MapReduce承担。

Computations where the result can’t be broken down into small updates (sorting a file, for example) are better handled by MapReduce.

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