Because of the limit in structure and data storage, common search engine cannot solve the problems in data collection, data storage, information searching and sorting of searching result.

普通的搜索引擎由于其结构和所存储数据等方面的限制，使其不能很好的解决在数据采集、数据存储、信息查询以及查询结果排序等方面所存在的问题。

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Consumer devices use common digital storage technology such as flash memory, hard disk drives or optical discs.

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These devices provide direct attached storage that can be used to save user content, such as in a backup, to move content from place to place faster than a network allows or even for expanding the useful storage capacity for some common household devices such as some set top boxes or DVRs.

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What kinds of storage models do the more common NoSQL databases support?

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