File incremental storage method and device, computer equipment and storage medium

Abstract

The invention discloses a file incremental storage method and device, computer equipment and a storage medium. The method comprises the steps that a user requests to upload a file; the type of the uploaded file is judged and if the uploaded file is an old file, a hash value of a system and information of a block where the file is located is provided when the user provides a previous version of file; the system obtains the file of the previous version from the block chain network; the file type of the previous version file is judged according to the metadata; a common file and a plurality of incremental update list files are acquired to iteratively restore the files; and an incremental update list file is generated by taking the iteratively reduced file as an old file and a file uploaded by a user as a new file, metadata is packaged outside the generated incremental update list file, the file is marked as the incremental update list file, and the packaged file is uploaded to a block chain network.

Description

technical field [0001] The present application relates to the technical field of blockchain storage, and in particular to a file incremental storage method, device, computer equipment and storage medium. Background technique [0002] Blockchain is a series of text records (also known as blocks) that are connected and protected by cryptography. Each block contains the encrypted hash of the previous block, the corresponding time stamp and transaction data (usually represented by the hash value calculated by the Merkle tree algorithm), which makes the content of the block difficult to Tampering features. The distributed ledger connected by blockchain technology allows two parties to effectively record the transaction and permanently verify the transaction. [0003] For a blockchain system whose main purpose is file storage, it needs to be considered that users will modify the content of files uploaded to the system. However, due to the non-tamperable nature of the blockchain...

AI Technical Summary

Problems solved by technology

However, due to the non-tamperable nature of the blockchain, uploaded files are generally not modifiable, so the existing system handles user modification of files by simply creating a new file

Most of the time, the modification of the file by the user is small. Compared with the content of the entire file, the part changed by the user is very small. In addition, a file needs to be stored on multiple nodes in the system at the same time. This situation causes The blockchain system stores a large amount of redundant content, wasting storage space and energy

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