The database server can use cooked files or raw devices to store data.
数据库服务器可以使用成熟的(cooked)文件或原始(raw)设备来存储数据。
For example, with the blog system, you may want to store the object used by the blog application to format the post information, rather than the raw HTML.
比如,对于这个博客系统,您可能想要存储被博客应用程序使用的对象以便格式化博客信息,而不是原始的HTML。
Historical store: a historical data store containing raw or summary metrics so that visualization and reporting can be viewed for a specific time frame.
历史库:包含原始或汇总指标的历史数据库,从而能够查看特定时间范围内的图表和报告。
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