The best way to understand Redis source code is to go through it step by step: get familiar with the basics of Redis. Select a specific module or function as the starting point. Start with the entry point of the module or function and view the code line by line. View the code through the function call chain. Be familiar with the underlying data structures used by Redis. Identify the algorithm used by Redis.
Redis source code interpretation guide
How to read Redis source code?
The best way to understand Redis source code is to go through it step by step:
- Be familiar with the basics of Redis: Before diving into the source code, make sure you have a solid understanding of the basic concepts and structure of Redis.
- Select a module or feature: Don't try to understand the entire code base at once. Select a specific module or function (for example, data structure or command processing) as the starting point.
- Step by step: Start with the entry point of the module or function and view the code line by line. When encountering unfamiliar features or data structures, please consult the documentation or online resources.
- Using a debugger: A debugger (such as GDB or LLDB) can help you gain insight into the execution flow and data flow of functions.
- Find Patterns and Abstracts: As you explore your code, look for repeat patterns and abstractions. This will help you understand the overall architecture and design of Redis.
- Reference Documentation: Use Redis official documentation and comments to supplement your understanding.
Specific steps:
- Get Redis source code: Download the latest version from the Redis website.
- Compile Redis: Follow the compilation instructions according to your system.
- Select a module: Start with the basic modules of Redis (such as server.c, networking.c, aof.c).
- Positioning function portal: Find functions responsible for specific functions. For example, for command processing, you can start with the redisCommandTable array.
- Step by step: view the code according to the function call chain.
- Understand data structures: Be familiar with the underlying data structures used by Redis, such as dictionaries, jump lists, and integer sets.
- Understanding algorithms: Identify algorithms used by Redis, such as expired key deletion or persistence.
By following these steps, you can gradually dive into the Redis source code to gain a comprehensive understanding of how internal work is done.
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