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.