An all-flash system and address mapping method based on zns solid state hard disk

Abstract

The present invention provides an all-flash memory system and an address mapping method based on a ZNS solid-state hard disk. The system includes: at least one ZNS solid-state hard disk, and the physical storage space of the at least one ZNS solid-state hard disk includes a mapping area and a data area; wherein, the mapping area used to store the object FTL mapping table; the object FTL mapping table includes for establishing the mapping relationship between the target object and the corresponding physical address; the target object includes any storage system operating unit built on the all-flash system; the The data area is virtualized as a contiguous storage address space and used to store data. The ZNS solid-state disk-based all-flash system and address mapping method provided by the embodiments of the present invention can eliminate the multi-rewrite amplification problem caused by the SSD, the all-flash system, and the application itself, and the object-based mapping method can adapt to the complex mix of different loads. scenarios, while simplifying the entire storage system design.

Description

technical field [0001] The invention relates to the field of ZNS solid-state hard disks, in particular to an all-flash memory system and an address mapping method based on ZNS solid-state hard disks. Background technique [0002] In the era of big data, the performance of traditional mechanical hard disks can no longer meet the needs of enterprise-level storage due to mechanical structure problems. Solid-state disks using semiconductor flash memory chips as storage media have brought revolutionary progress to the storage system and become a substitute for traditional disks. . However, as the enterprise-level storage system itself has higher and higher requirements for data capacity and throughput, a single solid-state drive is increasingly unable to meet the needs of the current enterprise-level storage system. All-flash storage technology, especially based on the development of disk array technology All-flash array technology provides a high-capacity, high-performance, hig...

AI Technical Summary

Problems solved by technology

Taking the all-flash array as an example, the RAID technology used is based on mechanical hard disks, without considering the characteristics of solid-state disks. The garbage collection problem caused by random writing of RAID stripes will introduce additional write amplification. It will also cause write amplification and cannot fully utilize the performance advantages of the all-flash system

In addition, the traditional block device interface reads and writes in units of logical blocks or sectors. The internal FTL mapping of enterprise-level SSDs is generally based on flash memory pages. This difference in access granularity will also cause performance loss and even aggravate the wear and tear of SSDs. Storage application logic has its own allocation, recovery algorithm and read / write unit, which will also cause performance loss

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