dbresolver

Introduction to the dbresolver Project

Overview

The dbresolver project is an innovative tool developed in Golang designed to manage multiple database connections in diverse topologies such as master-slave replication and cross-region databases. This library cleverly channels read queries to read-only replicas and directs write operations—like insertions, updates, and deletions—to primary or master databases. The tool is ideal for applications with heavy read operations or those operating across multiple geographical regions.

Inspiration and Purpose

The creation of dbresolver was driven by the need to efficiently manage database connections in complex setups. By automatically routing queries to the appropriate database and providing an easy integration method, the library improves performance and scalability in applications with varying database needs.

Use Cases

Use Case 1: Separated Read-Write (RW) and Read-Only (RO) Database Connections
The tool excels in setups where applications primarily perform read operations and require fast query responses. By distributing read operations to numerous read-only replicas and write operations to the primary database, dbresolver optimizes performance.

Use Case 2: Cross-Region Databases
In scenarios where applications are deployed across different regions, the dbresolver efficiently manages global database configurations. This is particularly useful for businesses operating internationally, as it allows for the seamless handling of data queries and updates across regional boundaries.

Use Case 3: Multi-Master Database Topology
For setups employing a multi-master database topology, such as AWS Aurora, dbresolver ensures data consistency and availability across all master nodes, handling queries in a balanced manner to improve system reliability.

Getting Started

To begin using dbresolver, developers can download the library using the following Go command:

go get -u github.com/bxcodec/dbresolver/v2

An example implementation of dbresolver involves setting up separate database connections for primary and replica databases. The dbresolver handles query routing effortlessly, ensuring that SQL Exec commands are directed to the primary database, while Query commands are routed to replica databases.

Support and Contribution

For support, users can file an issue on the GitHub repository. Documentation is available on Go.Dev. Contributions are welcome, and interested developers can participate by submitting pull requests or opening new issues on the project's GitHub page.

Important Functionalities

• Primary Database Usage: Functions like Exec, ExecContext, Begin, and BeginTx are executed on the primary database. Queries with a "RETURNING" clause also utilize the primary database.
• Replica Database Usage: Functions such as Query, QueryContext, QueryRow, and QueryRowContext are executed on the replica databases.

Conclusion

dbresolver is a robust solution for efficiently managing and routing multiple database connections. By simplifying the distribution of read and write operations, it enhances the performance and scalability of applications, making it a valuable asset for developers handling complex database topologies.