Issue Details

Number

27740

Title

Parallel compact blocks bandwidth reduction or improvements

Description

Opening a tracking issue post https://github.com/bitcoin/bitcoin/issues/25258 To summarize a few potential strategies: 1) It may be beneficial to reduce/eliminate concurrent block fetches from high-bandwidth outbound peers. That's at tension with the potential block relay speedup for non-listening peers, but at least non-listening peers aren't as vulnerable to sybil nodes. 2) Could reduce number of concurrent to 2, instead of 3, for non-listening only, or both modes, to reduce worst-case overhead/funneling to listening nodes 3) Could enable low-bandwidth compact outbound nodes instead by initiating a compact block fetch when a low-bandwidth outbound peer offers a header 4) Could add timers/schedules to give every announce attempt a "fair chance" before issuing another `getblocktxn` without unduly slowing down block relay. A number of these would benefit greatly from a "blockrequests.cpp" style refactor to make this all more understandable.

URL

https://github.com/bitcoin/bitcoin/issue/27740

Closed by

Notes

Attention of

Kill Factor (1-10)

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