Memory management method and device and storage system

Abstract

The invention provides a memory management method and device and a storage system. The method comprises the following steps: 1, judging whether the memory usage rate reaches a preset threshold value or not; wherein the memory comprises a plurality of memory blocks; wherein at least part of the memory blocks belong to allocated memory blocks; wherein each allocated memory block is used for storingdata of one service type; wherein the memory usage rate is the proportion of the allocated memory blocks in a plurality of memory blocks included in the memory, a step of selecting at least one targetmemory block from the allocated memory blocks when the memory usage rate reaches a preset threshold, and a step of clearing or transferring all data in the target memory block. By determining the memory utilization rate and clearing or transferring all the data in the target memory block, the target memory block can be used by other to-be-cached data, the memory utilization rate of the system isincreased, in addition, it is helpful for a service to successfully apply for the memory block, and the memory reliability of the system is improved.

Description

technical field [0001] The present application relates to the field of computer storage, and more specifically, to a method, device and storage system for managing memory. Background technique [0002] At present, in the storage system, in order to improve the read and write performance of metadata or user data, some businesses will apply for memory blocks from the memory including multiple memory blocks, write the data into the memory blocks, and then read and write the buffer storage module ( ReadWrite Cache, RW-Cache) manages these memory blocks for writing data to improve the speed of reading and writing data. [0003] In the prior art, when the memory space occupied by the stored data in the RW-Cache reaches a certain level, the stored data will be eliminated according to the hot and cold data or the first-in-first-out strategy, that is, the data stored in the memory block will be cleared. When all the data stored in the memory block is cleared, the memory block can be...

AI Technical Summary

Problems solved by technology

However, since data of more than one business type is stored in a memory block, the elimination strategy cannot guarantee that all the memory space in a memory block is released, and then the memory block cannot be recycled to the memory pool for use by other businesses

Therefore, the current way of managing memory does not guarantee that memory blocks are efficiently utilized

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