Cold data screening method, device, computer equipment and storage medium

Abstract

The invention relates to a cold data screening method, device, computer equipment, and storage medium, wherein the method includes establishing a number registration hash table; recording the number of data transfers of each page of data in the corresponding page of the number registration hash table; judging the Whether the above-mentioned transfer times is less than the threshold; if so, mark the data whose transfer times are not less than the threshold as cold data. The present invention establishes a times registration hash table with a page as a unit, registers the data transfer times of the corresponding page in the page of the times registration hash table, compares the number of hash times and the threshold value in the times registration hash table, and screens out The page where the number of data transfer times reaches or exceeds the threshold is located, and the data of the corresponding page is addressed, and the data is marked as cold data and stored in the cold data block, so that when the last cold data settles down, the block contains only Cold data contains less invalid data, which improves the performance and guaranteed life of solid-state drives.

Description

technical field [0001] The present invention relates to a method for screening data, more specifically to a screening method, device, computer equipment and storage medium for cold data. Background technique [0002] In the solid-state hard disk, it is necessary to distinguish the data written on the flash memory (NAND) into cold data and hot data. Among them, the data that is not used for a long time after writing is called cold data, and the data that is often used Known as hot data; reasonably and correctly distinguishing cold data has an impact on the performance and lifespan of flash memory. [0003] Currently, if figure 1 As shown, the data is screened by identifying the blocks according to the writing time. When each block is written, it will be assigned a time-sensitive identifier. This identifier is strictly incremental and is generally stored with an integer. , in the process of continuously writing data to the block, the number of blocks carrying valid data has ...

AI Technical Summary

Problems solved by technology

This screening method is based on blocks, and the granularity is relatively large. The filtered cold data blocks may contain more invalid data, which may cause hot and cold data to exist in a block at the same time. Finally, when the cold data settles down At this time, there is no hot data inside the block. At this time, the block only contains cold data and invalid data, but there will be a lot of invalid data, which will affect the performance and life of the solid state drive.

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