Data downsampling method and system, data query method and system and storage medium

The embodiment of the invention provides a data downsampling method and system, a data query method and system and a storage medium. In the embodiment of the invention, in the process of writing original data into a persistent storage medium from a memory, according to a preset downsampling rule, target original data written into the persistent storage medium is subjected to downsampling processing; and downsampling data obtained by downsampling processing is stored, so that pre-downsampling of the original data is realized. Therefore, during down-sampling query, the pre-down-sampling result can be directly queried without performing real-time down-sampling processing on the original data, so that the down-sampling query efficiency can be improved. 本申请实施例提供一种数据降采样和数据查询方法、系统及存储介质。在本申请实施例中，在原始数据从内存写入持久性存储介质的过程中，根据预设的降采样规则，对写入持久性存储介质的目标原始数据进行降采样处理；并存储降采样处理得到的降采样数据，实现了原始数据的预降采样。这样，在降采样查询时，可直接查询预降采样结果，无需对原始数据进行实时降采样处理，有助于提高降采样查询效率。