A data cache node management method, a data cache method, and a cache management node

Abstract

The present invention provides a data cache node management method, a data cache method and a cache management node. The data cache node management method is applied to the cache management node, and the cache management node is connected to at least one data cache node through communication. Any data cache node Each includes at least one hard disk, and a data cache node management method includes: obtaining capacity information of the hard disk in each data cache node; dividing at least part of the storage space of each hard disk into a plurality of data storage blocks according to the capacity information and creating a data storage block for each data Set block tags for storage blocks; for each data cache node: divide each data storage block in the data cache node into multiple block groups according to the block tags, each block group includes multiple data storage blocks, the same block The hard disks where the data storage blocks in the group are located are not exactly the same; each block group is determined as a data cache unit for data caching. The invention can realize low-cost caching of a large amount of data.

Description

technical field [0001] The invention relates to the field of data cache, in particular to a data cache node management method, a data cache method and a cache management node. Background technique [0002] In data processing, in order to facilitate the data requester to quickly access frequently accessed data and improve data output efficiency, the data downloaded from the hard disk will be stored in a system that is closer to the data requester and has a faster access speed. That is, data caching is performed. [0003] In the prior art, data caching is implemented based on memory, that is, data is stored in the memory space first, so as to improve the efficiency of input / output of the hard disk. [0004] Since the capacity of the memory is small, if the memory is used to cache a large amount of data, the cost is very high, so it becomes a difficult problem to realize the cache of a large amount of data at low cost. Contents of the invention [0005] In view of this, the...

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Problems solved by technology

[0004] Due to the small capacity of memory, if you want to use memory to cache a large amount of data, the cost is very high, so it becomes a difficult problem to realize low-cost caching of large amounts of data

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