Mixed storage system and method for supporting solid-state disk cache dynamic distribution

Abstract

The invention provides a mixed storage system and method for supporting solid-state disk cache dynamic distribution. The mixed storage method is characterized in that the mixed storage system is constructed through a solid-state disk and a magnetic disk, and the solid-state disk serves as a cache of the magnetic disk; the load characteristics of applications and the cache hit ratio of the solid-state disk are monitored in real time, performance models of the applications are built, and the cache space of the solid-state disk is dynamically distributed according to the performance requirements of the applications and changes of the load characteristics. According to the solid-state disk cache management method, the cache space of the solid-state disk can be reasonably distributed according to the performance requirements of the applications, and an application-level cache partition service is achieved; due to the fact that the cache space of the solid-state disk of the applications is further divided into a cache reading section and a cache writing section, dirty data blocks and the page copying and rubbish recycling cost caused by the dirty data blocks are reduced; meanwhile, the idle cache space of the solid-state disk is distributed to the applications according to the cache use efficiency of the applications, and therefore the cache hit ratio of the solid-state disk of the mixed storage system and the overall performance of the mixed storage system are improved.

Description

technical field [0001] The invention belongs to the technical field of computer storage, and in particular relates to a hybrid storage system and method supporting dynamic allocation of solid-state disk cache. The system can dynamically allocate and adjust the solid-state disk cache space of each application according to the load characteristics and performance requirements of the application Size to meet application latency needs and optimize overall performance of hybrid storage systems. Background technique [0002] Given that solid-state disks and disks have their own advantages in terms of price, capacity, and lifespan, data centers are increasingly inclined to use solid-state disks and disks to build hybrid storage systems with large capacity, high performance, and low price. Since the capacity and price of solid-state disks are between disk and memory, a large number of hybrid storage systems use solid-state disks as disk caches. The most typical representative is Fac...

AI Technical Summary

Problems solved by technology

Therefore, the size of the SSD cache resource allocated for the application not only directly affects the service quality of the application, but also affects the overall performance of the storage system

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