Hierarchical memory system and logical volume management method thereof

Abstract

The invention discloses a logical volume management method applied for a hierarchical memory system. A volume group bit chart is arranged, and the bits of the volume group bit chart correspond to the physical zones of a physical volume one to one; and the bits in the volume group bit chart indicate whether the corresponding physical zone is occupied or not. The method comprises the following steps: A. initializing a mapping array, wherein each element in the mapping array corresponds to one bit in the volume group bit chart, and the element value shows the position of the corresponding bit in the volume group bit chart; B. seeking a bit set to be invalid in the volume group bit chart and setting the value of the bit to be valid; C. recording the position of the sought bit in the volume group bit chart into the element corresponding to the mapping array of the logical volume; and D. creating a new logical volume which is mapped to the physical zone corresponding to the sought bit. The invention also discloses a memory system adopting the logical volume management method. With the scheme, the invention does not need to distribute a large number of physical zones in initialization, achieves the dynamic use of the physical zones, and greatly saves the memory resources.

Description

technical field [0001] The invention relates to the technical field of computer storage, in particular to a hierarchical storage system and a logical volume management method thereof. Background technique [0002] With the continuous development of storage and network technologies, the capacity of network storage has increased exponentially. Enterprise-level storage users expect higher data reliability and continuous access to data managed by enterprise servers; at the same time, storage server system administrators also hope for more efficient storage management strategies. [0003] During the use of enterprise-class storage servers, system administrators hope that storage resources can be dynamically adjusted, rather than predicting the capacity that a certain storage resource may require in the future at the beginning of use. When a storage resource is about to be exhausted, it can be expanded online to ensure sustainable access to data. [0004] Logical Volume Manager ...

AI Technical Summary

Problems solved by technology

[0007] Although logical volume management solves the problem of partition management very well, when users apply for storage resources (that is, divide logical volumes), they always consider future use and divide large-capacity space in advance, and in actual use, The actual space used is much smaller than the pre-divided space. Logical volume management still has the problem of waste of storage resources and low usage efficiency.

Images