Obelia improves upon structured DAG-based consensus protocols used in proof-of-stake systems, allowing them to effectively scale to accommodate hundreds of validators. Obelia implements a two-tier validator system. A core group of high-stake validators that propose blocks as in current protocols and a larger group of lower-stake auxiliary validators that occasionally author blocks. Obelia incentivizes auxiliary validators to assist recovering core validators and integrates seamlessly with existing protocols. We show that Obelia does not introduce visible overhead compared to the original protocol, even when scaling to hundreds of validators, or when a large number of auxiliary validators are unreliable.

翻译：Obelia改进了权益证明系统中使用的结构化有向无环图共识协议，使其能够有效扩展以容纳数百个验证节点。Obelia采用双层验证节点架构：核心验证节点组由高权益验证节点组成，按现有协议提议区块；辅助验证节点组由大量低权益验证节点构成，间歇性生成区块。Obelia通过激励机制促使辅助验证节点协助核心验证节点恢复运行，并能与现有协议无缝集成。研究表明，即使扩展至数百个验证节点，或当大量辅助验证节点不可靠时，Obelia相比原始协议也不会产生显著性能开销。