9d37a33dcd
* buffers data shreds to make larger erasure coded sets (#15849)
Broadcast stage batches up to 8 entries:
https://github.com/solana-labs/solana/blob/79280b304/core/src/broadcast_stage/broadcast_utils.rs#L26-L29
which will be serialized into some number of shreds and chunked into FEC
sets of at most 32 shreds each:
https://github.com/solana-labs/solana/blob/79280b304/ledger/src/shred.rs#L576-L597
So depending on the size of entries, FEC sets can be small, which may
aggravate loss rate.
For example 16 FEC sets of 2:2 data/code shreds each have higher loss
rate than one 32:32 set.
This commit broadcasts data shreds immediately, but also buffers them
until it has a batch of 32 data shreds, at which point 32 coding shreds
are generated and broadcasted.
(cherry picked from commit 4f82b897bc)
# Conflicts:
# ledger/src/shred.rs
* removes backport merge conflicts
Co-authored-by: behzad nouri <behzadnouri@gmail.com>