Address translation method based on hotspot collection and data storage device

Abstract

The invention discloses an address conversion method based on hotspot collection and a data storage device, and the method specifically comprises the following steps: 1), an FTL searches a corresponding table item of an address mapping table in a cache according to a logic page number of an issued request, if a target mapping item exists, the step 4) is executed, and if the target mapping item does not exist, the step 2) is executed; (2) dynamic conversion page indexes are checked one by one to judge whether target mapping items exist in corresponding dynamic conversion pages or not, if yes, the target mapping items are obtained by reading the corresponding dynamic conversion pages, all the mapping items in the dynamic conversion pages are loaded to a cache, and the step (4) is executed, and if not, the step (3) is executed when the mapping items are in one static conversion page; (3) the global conversion dictionary is queryed through a DFTL by adopting a conventional program to obtain a static conversion page containing the target mapping item, the static conversion page is read, only the requested target mapping item is loaded into a cache, the remaining items are rejected, and the step (4) is executed; (4) the physical page number corresponding to the logic page number is acquired and the request is executed. According to the method, the cache hit rate is increased, and more efficient address translation is realized, so that the access performance of the solid state disk is improved.

Description

technical field [0001] The invention relates to the field of computer storage, in particular to an address translation method and data storage device based on hotspot aggregation. Background technique [0002] Because of its advantages in performance, energy consumption, shock resistance, etc., solid-state drives have been deployed by most companies as important storage media in large-scale systems such as data centers. However, as the capacity of the solid-state disk increases, a larger DRAM space is required to store the mapping table in the page-level FTL. Assuming that the page size is 4KB, a 1TB SSD using the page-level mapping mechanism will have 2 28 mapping entries, which requires 2GB of DRAM space. Obviously, the size of the built-in DRAM of the solid-state drive is not enough to support the increasing capacity of the solid-state drive, so the built-in DRAM can only cache part of the mapping items, and the total mapping table is stored on the flash chip. [0003]...

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to overcome the defects of low address conversion efficiency and performance degradation in the prior art, and propose an address conversion method and data storage device based on hotspot aggregation

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