$ZRO LayerZero announces the launch of Quick Merkle Database (QMDB), a high-performance verifiable database optimized for blockchain, developed by LayerZero Labs, licensed under MIT and Apache-2, and fully open-source. Here are some key features of QMDB:
High Performance: QMDB can handle 2.28 million state updates per second, supporting 1 million TPS (benchmark transactions per second). In benchmark tests, its workload can reach 15 billion (10 times the state of Ethereum in 2024), and it has proven capable of scaling to 28 billion records on a single server.
Efficient Data Access and Updates: Each state access requires only a single read, with an I/O of O(1) during updates, and performs in-memory Merkleization with a storage footprint of 2.3 bytes per record.
Wide Hardware Compatibility: QMDB can efficiently scale on both consumer-grade and enterprise-grade hardware.
The design goal of QMDB is to address critical bottlenecks in blockchain state management by integrating key-value (KV) and Merkle tree storage into a unified architecture, achieving significant throughput improvements. Its innovative append-only “twig” design allows each state access to require only one SSD read, with update operations having constant-level I/O, and enabling Merkleization to be completed in memory without SSD read/write. These features ensure that QMDB not only meets current blockchain demands but also provides a solid foundation for building scalable, efficient, and verifiable decentralized applications.
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