SSD and HDD hybrid cache management method and system for an energy-saving storage system

Abstract

The invention discloses an SSD and HDD hybrid caching management method and system of an energy-saving storage system. The method comprises the steps that hybrid caching comprising SSD caching and HDD caching is built, the hottest data is stored by means of SSD caching, and hot data is stored by means of HDD caching; a global access list on the basis of combing the state and heat is created; classification processing is conducted on user requests according to the global access list; operation is conducted on data nodes of a primary storage pool according to the power supply status, wherein hybrid caching comprising SSD caching and HDD caching is introduced onto the primary storage pool of the energy-saving storage system facing new energy resources; in the period when electricity supply is inadequate, a catching layer processes most of requests of the storage system, data availability and access performance are guaranteed, and the access frequencies of the primary storage pool are reduced; data of a disk in an opening state is preferably eliminated in caching, data of a closed disk is reserved in HDD caching as much as possible, passive opening of the closed disk is reduced, and the effects of reducing passive opening of the disk and access energy consumption are achieved.

Description

technical field [0001] The invention belongs to the technical field of information storage, and more specifically, relates to an SSD and HDD hybrid cache management method and system for an energy-saving storage system. Background technique [0002] With the rapid development of information technology, the explosive growth of information volume has brought huge energy consumption demand to the data center, and the energy consumption of the storage system is gradually increasing in the total energy consumption of the data center; the main reasons include: ( 1) The capacity growth rate of a single storage device is slow, and more storage devices are needed to meet the rapidly increasing data storage demand, resulting in a slow improvement in the energy efficiency of storage devices; (2) The performance improvement speed of storage devices lags behind the growth of storage capacity (3) The improvement speed of energy efficiency of storage components is far lower than that of co...

AI Technical Summary

Problems solved by technology

[0005] (2) When the energy is insufficient, which data is migrated and which nodes are shut down to meet the availability of the system; if the data layout of frequently accessed nodes and less accessed nodes cannot be effectively organized, performance degradation, reduced reliability, and even Data cannot be accessed normally;

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