The core developers have tagged a new
2021.11.17.2 Hotspot firmware release which includes
CRITICAL fixes to ensure that Hotspots continue to follow the chain after the
24 hr+ chain halt observed on November 15th.
This is a mandatory release for manufacturers to ensure that overall network gossip continues to work as expected.
Note: A full post-mortem will be shared with the community early next week.
Blockchain Halt Fixes
- Consensus group members were saving transaction proposals to disk more often than was needed. Proposal construction state has been changed to write to disk piecewise.
- There were numerous places where blocks were unnecessarily read from the disk, leading to disastrous performance with the unexpectedly large block. Most of these have been eliminated by better block metadata caching.
- General performance sweep of the entire transaction validation and absorb pathways.
- Rewrite two low level repositories,
vincenty, in Rust to improve performance
block_size_limitchain variable which is defaulted to 50MB on miner but can be updated in the future with a chain variable transaction.
Please feel free to skim through the PRs mentioned below for more information.
PRs for resuming Hotspots sync
- blockchain-core#1108: Fix sync flag on add block events
- blockchain-core#1107: Ignore sync for recent blocks
PRs for resuming Blockchain
miner#1213: Switch to
miner#1210: Add a max block size when constructing blocks
blockchain-core#1105: Fix snapshot info handling
blockchain-core#1103: Update elections to not pull blocks
blockchain-core#1098: Upgrade block info to include hbbft round and election info
blockchain-core#1097: Remove two more unnecessary uses of
blockchain-core#1091: Do not send a stale state channel
blockchain-core#1090: Various performance improvements from downstream
relcast#48: Write keytree under txn in another spot
relcast#47: Attempt to add other key types to relcast serialization tree
erlang-hbbft#74: Attempt better serialization/deserialzation for rbc
erlang-hbbft#73: Temporarily hardcode max rpc proposal size to 5mb
erlang-hbbft#72: Attempt to use a keytree serialization for rbc to help performance
vincenty#2: Switch vincenty backend to Rust
e2qc#1: Switch e2qc backend to Rust
We have been beta testing
2021.11.17.2 since November 17, 2021 1:50 PM PT. Current ETA for GA is
4:30 PM PT, November 17, 2021.