58 posts tagged with "consensus"

High level summary​

• Merged the alternative fs-api interface for I/O using user-supplied buffers. This feature is important because it defines lower-level primitives for the filesystem API, which opens op avenues for more use cases and more efficient I/O operations (for instance when implementing lsm-tree, which is part of our efforts to move the ledger state to disk). This feature has not been released yet.
• Implemented new diffusion pipelining criterion .
• Released Consensus packages containing backports for Node 8.9.1.
• Focused on fixing the tests for ouroboros-consensus in the UTXO-HD branch. Work is ongoing.

High level summary​

• Completed the rebase of the production libraries for UTXO-HD on 8.9, both in ouroboros-consensus, cardano-api and cardano-node.
• Measured sync and replay times and memory in UTXO-HD. The latest result are reported here.
• Bugfixed the snapshot interval.
• Added an extra case to isIncorrectClaimedFlag for Babbage and Conway eras.
• Added a db-analyser analysis to get the UTXO size per slot. The result of the analysis is illustrated here.
• Started integration work for Node release 8.10.
• Reviewed the Genesis pull-requests submitted by Tweag. They are pending a final round of review.
• Helped the current release engineer prepare the 8.9 release candidate.
• The Consensus Team has also been helping troubleshoot known issues with 8.9 (eg snapshots causing missed leadership schedules, unexpected snapshot interval, integration tests, etc).

High level summary​

• Triaged an issue where blocks were unnecessarily downloaded, and coded a prototype for a partial solution.
• Discovered an io-sim bug while developing the Genesis state machine tests. The bug was already fixed upstream.
• Added support for making the number of ledger state snapshots to be kept configurable. This needs to be integrated in the node.

High level summary​

This week we managed to integrate in the node the Consensus version of the UTxO-HD prototype that features the second version of the Ledger DB API. We also changed the epoch structure for Conway, made progress towards the Bootstrap State Machine and Peras planning. On the support front, we are investigating the impact of snapshots on missed leadership checks.

High level summary​

This week the team continued working on the second iteration of the Ledger DB API for UTxO-HD, as well as on Genesis. We incorporated further improvements to the onboarding documentation, and wrote a document explaining a specific subtlety of our chain orders. For Conway, we integrated DReps and initial delegates injection, which will allow the Performance and Tracing team to run benchmarks for this era.