2,分头收集（Scatter and Gather） – 把一个请求分解成好几个服务请求分发到多个server上，每个server处理后返回的结果会被合并成一个返回结果给请求端。
基于1个网页-相关网页
scatter read and gather-write [计] 分散读集中写
Internally, this configuration is represented as a scatter-gather list (with each entry in the list representing an address and a length).
该配置在内部被表示为一个散集列表(scatter - gather)，列表中的每个条目表示一个地址和一个长度。
Would that I could gather your houses into my hand, and like a sower scatter them in forest and meadow.
我愿将你们的房舍收聚于手中，然后似播种般将它们撒向森林和草原。
While children gather pebbles And scatter them again.
而孩子们将鹅卵石拾起又抛散。
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