Commits on Sep 30, 2024

1. Use maximum allowed response size for request/response protocols (#5753) …

   # Description
   
   Adjust the PoV response size to the default values used in the
   substrate.
   Fixes #5503
   
   ## Integration
   
   The changes shouldn't impact downstream projects since we are only
   increasing the limit.
   
   ## Review Notes
   
   You can't see it from the changes, but it affects all protocols that use
   the `POV_RESPONSE_SIZE` constant.
   - Protocol::ChunkFetchingV1
   - Protocol::ChunkFetchingV2
   - Protocol::CollationFetchingV1
   - Protocol::CollationFetchingV2
   - Protocol::PoVFetchingV1
   - Protocol::AvailableDataFetchingV1
   
   ## Increasing timeouts
   
   https://github.com/paritytech/polkadot-sdk/blob/fae15379cba0c876aa16c77e11809c83d1db8f5c/polkadot/node/network/protocol/src/request_response/mod.rs#L126-L129
   
   I assume the current PoV request timeout is set to 1.2s to handle 5
   consecutive requests during a 6s block. This setting does not relate to
   the PoV response size. I see no reason to change the current timeouts
   after adjusting the response size.
   
   However, we should consider networking speed limitations if we want to
   increase the maximum PoV size to 10 MB. With the number of parallel
   requests set to 10, validators will need the following networking
   speeds:
   - 5 MB PoV: at least 42 MB/s, ideally 50 MB/s.
   - 10 MB PoV: at least 84 MB/s, ideally 100 MB/s.
   
   The current required speed of 50 MB/s aligns with the 62.5 MB/s
   specified [in the reference hardware
   requirements](https://wiki.polkadot.network/docs/maintain-guides-how-to-validate-polkadot#reference-hardware).
   Increasing the PoV size to 10 MB may require a higher networking speed.
   
   ---------
   
   Co-authored-by: Andrei Sandu <[email protected]>
   (cherry picked from commit 0c9d8fe)

   

   AndreiEres authored and github-actions[bot] committed Sep 30, 2024
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