A method and a system for improving the replication performance of a solid state disk

Abstract

The invention relates to a method and a system for improving the replication performance of a solid state hard disk. The method comprises the following steps: S1, an SSD controller receives the lba data to the DRAM, and enables the SHA-1 algorithm at the same time to generate a Hash value H; S2, judging whether a record with hash value H exists in the H2P table; if yes, entering S3; if not, proceeding to S4; S3, obtaining a physical address P2 corresponding to the hash value H from the H2P table, and corresponding the physical address P2 of the lba in the L2P table; S4, writing the lba data into the current physical page P, updating the physical address of the lba in the L2P table to P1, applying for a new H2P recording unit, and recording the physical address corresponding to the hash value H to be P1. The invention greatly reduces the writing operation of the flash memory, greatly improves the performance under the duplication situation, improves the duplication efficiency, better meets the requirements, and can prolong the service life of the flash memory.

Description

technical field [0001] The invention relates to the technical field of rewriting of solid-state hard disks, and more specifically refers to a method and system for improving the rewriting performance of solid-state hard disks. Background technique [0002] In a multi-user state enterprise-level application environment and a virtual machine environment, many data contents written to storage devices among users are the same. [0003] In the prior art, SSD as a storage device still stores data according to the traditional writing method, that is, writes the data sent by the host into the flash memory sequentially, and uses the mapping table to remember the mapping between LBA (Logic Block Address) and physical address relationship, for subsequent reading of data; in this way, repeated writing of the same data affects SSD rewriting performance, reduces work efficiency, and cannot meet the demand. Contents of the invention [0004] The purpose of the present invention is to ov...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, SSD as a storage device still stores data according to the traditional writing method, that is, writes the data sent by the host into the flash memory sequentially, and uses the mapping table to remember the mapping between LBA (Logic Block Address) and physical address relationship, for subsequent reading of data; in this way, repeated writing of the same data affects SSD rewriting performance, reduces work efficiency, and cannot meet the demand

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