Mixed storage system and storage method based on solid state disk and magnetic hard disk

Abstract

The invention discloses a mixed storage system and a storage method based on solid state disks and magnetic hard disks. The mixed storage system is characterized by comprising an array consisting of one or a plurality of magnetic hard disks, an array consisting of one or a plurality of solid hard disks and a storage controller, wherein the magnetic hard disk array and the solid state disk array are connected with a computer bus through the storage controller. The storage controller maintains a mapping table from logic pages to physical pages, and is in charge of counting access modes of the logic pages at the same time. According to the performance characteristics of the solid state disks and the magnetic hard disks, the pages are optimally distributed so that hotspot pages which is fewer and is random accessed more are distributed to the solid state disk array, and most common pages with fewer access or mainly based on sequential access are distributed in the magnetic hard disk array, thereby fully exerting the performance superiority of high speed random access of the solid state disks, improving the access performance of the whole system and shortening the time of searching and responding.

Description

technical field [0001] The invention relates to data information processing, in particular to a hybrid storage system and storage method based on a solid-state hard disk and a magnetic hard disk. Background technique [0002] With the rapid development of flash memory technology, solid-state drives have gradually entered the market and become a new generation of permanent storage devices that may replace traditional magnetic hard drives. From a performance point of view, since solid-state drives are electrical devices, there is no seek time, so they can provide random access performance tens to hundreds of times higher than traditional disks. Another important characteristic of solid-state drives is the asymmetry of reading and writing. Compared with reading, the write operation of solid-state drives is much more expensive. Scrap, shorten the life of the solid state drive. [0003] At the same time, it is noticed that despite the rapid progress in manufacturing technology,...

AI Technical Summary

Problems solved by technology

2) The logical characteristics of the application are not fixed. With continuous updates, hot data may become less hot, and some new data may become hot data

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