Block chain data reading method, system and device and readable storage medium

Abstract

The invention discloses a block chain data reading method. The method comprises the steps of receiving a data reading request; determining a keyword of the to-be-read data according to the data reading request; calling a bottom layer LSM storage engine to sequentially search data items corresponding to the keywords in the memory database and the temporary database; and if the data item corresponding to the keyword is not found, searching the data item corresponding to the keyword in parallel in each hierarchy of the file system. According to the method, when the data items corresponding to thekeywords are not found in the memory database and the temporary database; according to the method, the data items corresponding to the keywords are searched in parallel in each hierarchy of the filesystem, so that the time expenditure of block chain reading operation is reduced. The problem of slow reading and writing caused by too many LSM hierarchies is greatly reduced. The LSM reading performance is remarkably improved. The invention also provides a blockchain data reading system and device, and a computer readable storage medium, which have the above beneficial effects.

Description

technical field [0001] The present application relates to the field of blockchain, in particular to a method, system, device and computer-readable storage medium for reading blockchain data. Background technique [0002] Blockchain stores data through LSM Tree (Log Structure Merge Tree, log structure merge tree) structure. Traditional LSM Tree can use level db (a very efficient kv database implemented by Google), rocksdb (embedded Key-value storage System) and so on to achieve data storage, its advantage is to achieve the best write performance by converting the random write of the disk into sequential write, so as to quickly build the index. [0003] However, as the amount of data continues to increase and the number of levels increases, the problem of LSM read amplification becomes more obvious, and the cost of LSM Compaction increases sharply, especially in stressful environments, which affects the overall performance of the blockchain process. [0004] Therefore, how to...

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Problems solved by technology

[0003] However, as the amount of data continues to increase and the level increases, the problem of LSM read amplification becomes more obvious, and t

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