Method and device for updating L2P table, equipment and readable medium

Abstract

The invention discloses a method for updating an L2P table, and the method comprises the following steps: responding to a received write data request of a plurality of LBAs, and respectively applying for a plurality of PBAs for the plurality of LBAs; adding locking marks to the multiple PBAs, and aggregating the multiple PBAs in a reserved cache to obtain an aggregated PBA containing all the PBAs; and updating the non-aligned part of the polymerized PBA into the L2P table through two XOR functions, and updating the aligned part of the polymerized PBA into the L2P table through one MOVE function. The invention further discloses a device for updating the L2P table, computer equipment and a readable storage medium. According to the method, an aggregation cache unified updating mechanism is adopted, the multiple LBAs are subjected to aggregation cache processing and uniformly updated to the DDR, it is ensured that deadlock cannot be caused under the condition that the read L2P granularity is inconsistent with the particles updated by the L2P, the number of times of updating the L2P table is reduced, the use frequency and the operation load of a hardware unit are reduced, and therefore the data writing performance is improved.

Description

technical field [0001] The present invention relates to the field of storage technology, in particular to a method, device, equipment and readable medium for updating an L2P table. Background technique [0002] The process of writing data in SSD needs to go through multiple steps. Writing data means writing data into the hardware unit, that is, into the solid-state storage unit. The performance of writing data and the correctness of data are important characteristics of solid-state drives. The process of data has high requirements. [0003] In the existing data writing process, it is not only necessary to operate on user data, but also to support the existing internal management metadata of the SSD, such as updating the L2P table, etc., which often require the performance and physical cost of the SSD. Considering. According to the transmission path of user data, it is roughly divided into the following steps: the operating system issues a write data command, and after rece...

AI Technical Summary

Problems solved by technology

In order to save physical costs, we adopt a 32-bit unaligned solution for L2P, instead of one L2P corresponding to one 32-bit, but this will increase the complexity of updating the L2P table and affect the write performance

[0005] The existing solution is to perform two DATANETWORK operations every time an LBA is updated. The reason is that the non-aligned LBA has 2 DWORDs, which is very inefficient.

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