Block chain metadata storage system, and storage method and retrieval method thereof

Abstract

The invention discloses a block chain metadata storage system, and a storage method and a retrieval method thereof. The system comprises at least one main node and a plurality of secondary nodes which are respectively connected with the Internet and construct a distributed shared network via a block chain. The main node a data receiving module used for receiving source data from the outside; a distributed storage module connected with the data receiving module, and used for storing the source data in a distributed manner; a dimensionality reduction and preservation module connected with the distributed storage module, and used for performing preservation operation on metadata to form a data fingerprint after the metadata is formed by performing dimensionality reduction on the source data; and a data storage module connected with the dimensionality reduction and preservation module, and used for writing the data fingerprint into the block chain and performing whole network issue by using a consensus process of the block chain. Each secondary node comprises a data consensus module used for receiving and storing the data fingerprint issued by the block chain and completing the consensus process of the block chain.

Description

technical field [0001] The invention relates to the field of data storage and retrieval, in particular to a metadata storage system and a storage and retrieval method. Background technique [0002] The blockchain is a reliable database maintained by a decentralized and trustless collective. The distributed network is the infrastructure of the blockchain. The data generated on each node is broadcast to other nodes through the distributed network, and other nodes pass the workload proof. to verify the authenticity of the data. Distributed network is the premise to ensure the decentralized, non-tamperable, and traceable features of blockchain. In the Bitcoin network, it is precisely because of the verification nodes distributed around the world that the Bitcoin workload proof mechanism is recognized. Only then did people realize the value of the blockchain. [0003] The distributed network is the basis of the blockchain, and each node connected to the distributed network stor...

AI Technical Summary

Problems solved by technology

But in the actual application system, business data may be very large, especially including video and audio data, often dozens of megabytes, some even hundreds of megabytes, such a huge data transmission in the network, the bandwidth requirements are very high, and If such a large amount of data in the entire network is aggregated into "one ledger", the ledger will be very large, and it is difficult for a single node to guarantee sufficient storage capacity to store

Even in the current Bitcoin network, the capacity of the ledger is still above 4G after optimization, and with the progress of mining, the capacity of the ledger continues to expand. It takes dozens of hours for an ordinary PC to download the entire ledger , which seriously affects the user experience, which not only poses a great challenge to the popularization and promotion of blockchain, but also makes the application of blockchain in commercial systems more severe.

[0004] Corresponding to data storage is data retrieval. How to quickly retrieve the huge "one ledger" data is also facing severe challenges in the blockchain distributed network

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