Method for aggregating static data and solid-state disk thereof

Abstract

The invention provides a method for aggregating static data and a solid-state disk thereof, which are applicable to the technical field of storage. The method includes the following steps of setting the index digits and the redundant digits of physical page address in a page mapping table of the solid-state disk; counting the times of garbage collection and transferring of effective data in the logic page address in the page mapping table by the redundant digits; and transferring the effective data in the logic page address according to the count number of the redundant digits and the preset maximum value of times of garbage collection and transferring of the effective data when in operation of garbage collection for the data in the logic page address. Accordingly, the static data which are scattered in the solid-state disk can be aggregated, frequent transferring of the scattered static data due to garbage collection is avoided, and write amplification of the solid-state disk is lowered.

Description

technical field [0001] The invention relates to the technical field of storage, in particular to a method for gathering static data and a solid-state hard disk thereof. Background technique [0002] In a large-capacity SSD (solid state disk, solid state drive), on the premise that DRAM (Dynamic Random Access Memory, dynamic random access memory) is sufficient, page mapping is generally used as the address mapping method. That is, the page mapping table is used to record the mapping relationship between each logical page address and the physical page address, and the page mapping table is stored in the DRAM during the power-on operation of the SSD; in addition, in order to improve the read and write speed, a multi-channel parallel read Writing technology, for this reason, the SSD is divided into multiple data areas, and each data area corresponds to a read and write channel. Wherein, each data area is divided into multiple data blocks, and each data block is divided into mul...

AI Technical Summary

Problems solved by technology

[0008] Therefore, since the granularity of wear leveling to identify static data is the data block, static data cannot be identified at the smaller granularity—data page level, resulting in scattered and scattered static data due to multi-channel parallel writing that cannot be retrieved again. Collected and moved again and again by garbage collection, and this movement is unnecessary and avoidable

[0009] In summary, the existing static data aggregation technology obviously has inconvenience and defects in actual use, so it is necessary to improve it

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