Data migration method and apparatus

A storage device, comprising a processor and a first storage unit group, wherein the first storage unit group comprises a plurality of storage units, each storage unit is a composition unit of a block comprised in a logical unit, the logical unit is logical storage space provided by the storage device and accessible by a host, wherein the processor is configured to:

• obtain data access temperature of the first storage unit group, wherein the data access temperature of the first storage unit group is determined by data access temperature of each storage unit, and the data access temperature of each storage unit is determined by a logical unit in which the storage unit is located;
• and
• migrate data in the first storage unit group to a second storage unit group, wherein access performance of the second storage unit group is higher than access performance of the first storage unit group, when the data access temperature of the first storage unit group reaches a specified threshold.

A computer readable storage medium, wherein the computer readable storage medium stores an instruction, and when the instruction is run on a computer or a processor, the computer or the processor is enabled to perform the method as below:

• obtaining data access temperature of a first storage unit group, wherein the first storage unit group comprises a plurality of storage units, each storage unit is a composition unit of a block comprised in a logical unit, the logical unit is logical storage space provided by a storage device and accessible by a host, the data access temperature of the first storage unit group is determined by data access temperature of each storage unit, and the data access temperature of each storage unit is determined by a logical unit in which the storage unit is located;
• and
• when the data access temperature of the first storage unit group reaches a specified threshold, migrating data in the first storage unit group to a second storage unit group, wherein access performance of the second storage unit group is higher than access performance of the first storage unit group.

A computer program product comprising an instruction, wherein when the computer program product is run on a computer or a processor, the computer or the processor is enabled to perform the method as below:

• obtaining data access temperature of a first storage unit group, wherein the first storage unit group comprises a plurality of storage units, each storage unit is a composition unit of a block comprised in a logical unit, the logical unit is logical storage space provided by a storage device and accessible by a host, the data access temperature of the first storage unit group is determined by data access temperature of each storage unit, and the data access temperature of each storage unit is determined by a logical unit in which the storage unit is located;
• and
• when the data access temperature of the first storage unit group reaches a specified threshold, migrating data in the first storage unit group to a second storage unit group, wherein access performance of the second storage unit group is higher than access performance of the first storage unit group.