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site/news/2025-02-17-weekly-progress-summary.md

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## High-level summary
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This week marked significant progress in multiple areas of the Leios project. Major developments included the approval of [CPS-0018](https://github.com/cardano-foundation/CIPs/blob/master/CPS-0018/README.md) for transaction throughput, enhanced Docker support for simulations, and important findings from cross-simulation comparisons. The team also made strides in analyzing IB production rates and their impact on network performance.
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This week in Leios development, [CPS-0018](https://github.com/cardano-foundation/CIPs/blob/master/CPS-0018/README.md) for transaction throughput was approved, along with improved Docker support for simulations and analysis of cross-simulation results. The team also examined input block (IB) production rates and their impact on network performance.
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## Protocol development
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- [CPS-0018](https://github.com/cardano-foundation/CIPs/blob/master/CPS-0018/README.md) "Greater Transaction Throughput" officially approved:
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- CPS-0018 'Greater transaction throughput' officially approved:
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- Merged into Cardano Foundation's CIP/CPS repository
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- Documents urgency of higher transaction throughput
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- Defines goals for Leios initiative
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- Identifies key open questions and use cases
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- Defines goals for the Leios initiative
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- Identifies key open questions and use cases.
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## Cross-simulation analysis
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- Conducted comprehensive [analysis](https://github.com/input-output-hk/ouroboros-leios/blob/main/Logbook.md#simulation-of-varied-ib-production-rate) of IB production rates from 1 IB/s to 100 IB/s:
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- Developed ELT workflow for data processing via MongoDB
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- Created R Jupyter notebook for analysis and visualization
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- Conducted a comprehensive [analysis](https://github.com/input-output-hk/ouroboros-leios/blob/main/Logbook.md#simulation-of-varied-ib-production-rate) of IB production rates ranging from 1 IB/s to 100 IB/s:
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- Developed an ELT workflow for data processing via MongoDB
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- Created an R Jupyter notebook for analysis and visualization
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- Identified and addressed three significant bugs ([#207](https://github.com/input-output-hk/ouroboros-leios/issues/207), [#208](https://github.com/input-output-hk/ouroboros-leios/issues/208), [#209](https://github.com/input-output-hk/ouroboros-leios/issues/209))
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- Key findings from Haskell simulation:
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- Key findings from the Haskell simulation:
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- Network congestion emerges at high IB production rates
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- Both average propagation time and slow propagation tail increase
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- Critical threshold identified at ~40 IBs/s where network congestion severely impacts block reception
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- Compared PeerNet and Haskell simulations:
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- Qualitatively similar block propagation distributions
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- A critical threshold of ~40 IBs/s was identified, beyond which network congestion severely impacts block reception
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- Comparison of PeerNet and Haskell simulations:
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- Both exhibit qualitatively similar block propagation distributions
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- Both demonstrate protocol breakdown under high block production rates
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- Differences in resolution and configuration prevent exact comparison
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- Differences in resolution and configuration prevent exact comparison.
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## Infrastructure improvements
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- Added comprehensive Docker support for both simulations:
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- Multi-stage Dockerfile optimization for both Haskell and Rust
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- Optimized multi-stage Docker files for Haskell and Rust
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- Simplified deployment process
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- Easy configuration via volume mounts and parameters
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- Documented usage in README.md
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- Enabled easy configuration via volume mounts and parameters
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- Documented usage in README.md.
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## Rust simulation
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- Enhanced Rust simulation capabilities:
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- Implemented bandwidth usage tracking
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- Added configurable bandwidth limits per connection
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- Fixed issues discovered during cross-simulation comparison
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- Started professional visualization updates
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- Fixed issues identified in cross-simulation comparisons
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- Started updating visualizations for improved clarity.
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## Haskell simulation
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- Enhanced IB sortition handling for IB/slot < 1
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- Began integration of block expiration/diffusion-halt proposal
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- Began integrating block expiration and diffusion-halt proposal
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- Implemented ideal timing calculations for diffusion:
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- Added uniform block behavior configuration
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- Identified Relay mini-protocol complexity:
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- Identified relay mini-protocol complexities:
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- Variable latency (3-4) for block transfer
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- Dependent on traffic conditions and request handling method
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- Latency depends on traffic conditions and request handling.
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## Formal methods
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- Relocated formal specification to [dedicated repository](https://github.com/input-output-hk/ouroboros-leios-formal-spec)
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- Established conformance testing framework:
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- Moved formal specification to a [dedicated repository](https://github.com/input-output-hk/ouroboros-leios-formal-spec)
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- Established a conformance testing framework:
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- Enabled testing between Short Leios implementations
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- Documented test suite execution process
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- Initiated survey of network models across IO consensus projects
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- Documented the test suite execution process
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- Initiated a survey of network models across IO consensus projects.

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