mimblewimble/grin

Initial txhashset download (request it from a fast peer)

Open

#3,083 创建于 2019年10月4日

在 GitHub 查看
 (1 评论) (0 反应) (0 负责人)Rust (4,876 star) (991 fork)batch import
enhancementhelp wanted

描述

Related - #3082 (initial header sync)

If we track "fast" peers during the initial header sync it might make sense to use this information when deciding which peer to request the txhashset.zip from.

This zip file includes the full kernel set and the current UTXO set and is approx 425MB currently.

Right now we arbitrarily choose a random peer to download this zip file from and if we get a slow peer then the initial sync is painfully slow. If we uses some better heuristics we would be far more likely to get "lucky" and download it in a reasonable period of time (and reliably).

贡献者指南

技术栈
rust
领域
backendblockchainperformance
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。
1-2 days
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
Familiarity with Grin's peer trackingUnderstanding of initial header sync (issue #3082)Rust programming knowledge
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。
45
研究方向
Examine the initial header sync implementation in `src/sync/header sync.rs` and how peers are tracked there. Look at the current peer selection logic for downloading txhashset.zip in `src/sync/body sync.rs`. Consider adding a field to track peer download speed and use that to select the fastest peer for the zip download, similar to how header sync tracks fast peers. Test the heuristic with different network conditions.
Initial txhashset download (request it from a fast peer) · mimblewimble/grin#3083 | Good First Issue