Setting the Scene 🌐

Since Sei's mainnet beta launch in August 2023, it has consistently achieved a remarkable 390ms time to finality, making it the fastest blockchain to date. The recent proposal of Sei v2, the first parallelized EVM blockchain, promises to elevate Sei's performance by combining the best of Solana and Ethereum.

Enter SeiDB: A Game-Changer in Storage ⚙️

To tackle the challenges of state bloat, Sei v2 introduces SeiDB, a groundbreaking storage layer designed to optimize state access, commitment, and storage. Let's delve into the key takeaways:

🔍 Key Takeaways

  • 60% Reduction in Active State Size: SeiDB significantly reduces the active state size, enhancing blockchain efficiency.

  • 90% Decrease in Historical Data Growth: Historical data growth is curtailed, preventing performance degradation over time.

  • 1200% Faster State Sync Times: SeiDB accelerates state synchronization, ensuring nodes stay in sync seamlessly.

  • 2x Improvement in Block Commit Times: With SeiDB, block commit times see a remarkable 287x improvement.

  • 2x Overall TPS Improvement: Faster state access and commit translate to a 2x boost in transactions per second.

State Bloat: The Storage Challenge 📊

Active State

  • Snapshot Challenges: Large state sizes hinder critical operations like snapshot creation, leading to longer catch-up periods after state sync.

  • Write Amplification Issue: Sei v1 storage faces a 2.5x write amplification ratio, resulting in inefficient use of storage.

Historical State

  • Rapid Storage Growth: Historical data on Sei v1's testnet was growing at an unsustainable rate of 150GB per day.

State Commitment (SC) Layer 🌳

  • Memory-Mapped IAVL Tree: SeiDB divides data into two layers, utilizing a memory-mapped IAVL tree for active state commitment.

  • Async Transaction Commit: Asynchronous commitment ensures minimal transaction commit latency, enhancing performance.

State Storage (SS) Layer 💽

  • Efficient Raw Key-Value Pairs: SS stores raw key-value pairs with minimal metadata, reducing state storage requirements by 60%.

  • Flexible Backend Support: Supports various backends, including RocksDB, SQLite, and PebbleDB, offering flexibility for node operators.

Benchmarks 📈

  • 1200% Speedup for State Sync: SeiDB delivers a remarkable speedup for state synchronization, optimizing read and write operations.

  • 287x Faster ABCI Block Commit Latency: SeiDB's asynchronous commit results in a substantial 287x improvement in ABCI block commit latency.

Conclusion 🌟

SeiDB emerges as a game-changer, addressing state bloat challenges and significantly enhancing the speed, performance, and reliability of Sei's blockchain storage. As Sei Labs continues to refine SeiDB, we anticipate even greater strides in TPS and throughput, reinforcing Sei's position as an industry leader.

For detailed insights and contributions to technical discussions, explore the SeiDB proposal on the Sei Developer Forum.

Kudos to Bez from Cosmos SDK and the Cronos team for their invaluable contributions to this groundbreaking work!

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