Distributed Database Transaction Validation via Client-Side Digest
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Solution Overview
Problem
Distributed database management systems face challenges in ensuring the integrity and atomicity of transactions due to commands being received out of order or not received at all, which compromises the reliability of data storage and retrieval.
Innovation Solution
A distributed database system computes a digest of transactions based on command signatures, comparing it with a client-computed digest to validate the order and completeness of commands, ensuring that either all commands are successfully executed or the transaction is rolled back.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If commands are transmitted separately in a distributed database system, then the system can operate with higher flexibility and distribution, but commands may be received out of order or not received at all, compromising transaction integrity
Solution Approach 1:
The patent applies preliminary action by computing a digest of the transaction on the client side before transmitting commands to the database. This digest serves as a pre-computed verification value that enables the database to later validate whether all commands were received in the correct order without requiring complex coordination between distributed nodes.
Solution Approach 2:
The patent implements feedback by having the database compute the same digest independently after receiving all commands and comparing it with the client-computed digest. This feedback mechanism confirms that commands were transmitted and received correctly, allowing the system to detect and reject transactions with missing or out-of-order commands.
2Reliability
If the system validates transaction integrity by computing and comparing digests, then transaction reliability is improved, but the computational overhead and processing time increase
Solution Approach 1:
The patent replaces complex mechanical verification mechanisms with cryptographic hash functions. Instead of requiring the database to track and verify the order and completeness of individual commands through complex state management, it substitutes this with a mathematical digest computation that inherently encodes all necessary verification information.
Solution Approach 2:
The patent transforms the verification problem from checking individual command parameters (order, presence) into a single digest parameter comparison. By changing the verification approach from multiple parameter checks to a single hash value comparison, the system reduces validation complexity while maintaining reliability.
3Measurement precision
If the system performs digest computation and comparison for every transaction, then transaction validation accuracy is improved, but processing speed decreases
Solution Approach 1:
The patent performs the digest computation on the client side before transaction submission, moving part of the computational workload away from the database server. This preliminary action allows the database to receive pre-validated transaction data, reducing the processing burden during transaction execution.
Solution Approach 2:
The patent uses cryptographic hashing to create a compact copy (digest) of the entire transaction that can be quickly computed and compared. This copying approach allows for rapid validation without requiring the database to re-process or re-analyze the original command data, thus maintaining high processing speed while ensuring validation accuracy.
Data Source
AI summary
A distributed database receives a first command and second command sent by a client for processing in the context of a transaction. The distributed database validates the transaction by computing a digest based on signatures of the first and second commands, and comparing the computed digest to a digest received from the client. The transaction is committed upon validation.