imsnif/bandwhich

Retry DNS only after timeout

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#127 创建于 2020年1月16日

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 (5 评论) (0 反应) (0 负责人)Rust (7,686 star) (237 fork)batch import
good first issuehelp wanted

描述

Right now, when we do our reverse-dns queries (getting the hostname of an ip address), if the request failed, we retry immediately. This can cause a lot of connections (also visible in the app!) to be opened if a request repeatedly fails.

It would be nice if we have some sort of progressive backoff mechanism for this... something like: wait for 1 second before retrying, then wait for 2, 4, etc.

贡献者指南

技术栈
rust
领域
backendperformance
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
half day
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
basic Rust knowledgeunderstanding of DNS resolutionfamiliarity with retry/backoff concepts
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
50
研究方向
Examine the current DNS reverse lookup logic in bandwhich (likely in the dns module). Implement an exponential backoff strategy for retries: start at 1 second, then double after each failure. Ensure the backoff resets on success. Add configurable max delay and optional jitter. Test with simulated failures.
Retry DNS only after timeout · imsnif/bandwhich#127 | Good First Issue