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。
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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