56 posts tagged with "consensus"

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.

High level summary​

For the past two weeks the Consensus team:

• Resumed work on implementing the initialization and internals of the second iteration of the in-memory ledger database.
• Resumed work on integrating the new ledger database API for UTxO HD.
• Simplified query versioning for downstream users (863 and 403).
• Confirmed the cause of missed leadership checks due to ledger snapshots (868).
• Derived principles for the versioning/declaration of queries, since Conway complicates it (864 and 866).
• Unblocked the Node Team in the work on rollback-insensitive leadership schedule queries (4765).
• Drafted the (Pre-Genesis) Bootstrap State Machine (808).

High level summary​

The Consensus team implemented and tested a patch that does not propagate future headers. It is under review, and we expect it can be released in the next Cardano node version. On the UTxO-HD front, we finished prototyping the LedgerDB and BackingStore redesign, which is required for the LSM-tree integration and might help us implement a more resource efficient in-memory backend. With this prototype finished we can start integrating the rest of the code. We investigated the unexpected performance degradation observed when acquiring the block context. We also released Cardano node 8.7.0 and moved tree-diff outside cardano-ledger libraries.