Original English article: https://www.nervos.org/knowledge-base/modular_vs_monolithic_(explainCKBot)
With the rapid development of blockchain technology, a variety of architectural designs have emerged in the market, among which modular blockchain and monolithic blockchain are the most representative. The entire industry is seeking to solve the "blockchain impossible triangle", that is, to achieve security, scalability and decentralization at the same time, so it is necessary for us to understand the core differences between these two architectural designs.
This article will provide an in-depth analysis of modular blockchains and monolithic blockchains, comparing their advantages and disadvantages in solving the scalability problem.
Monolithic blockchain
A monolithic blockchain is a blockchain network that runs on a single layer, performing all key responsibilities (transaction execution, data availability, and consensus) within the same architectural framework, providing a simple approach for blockchain developers. Bitcoin is a typical example of a monolithic blockchain.
Advantages of Monolithic Blockchain
Simple: Monolithic blockchains can directly implement blockchain networks through a single-layer design, making it easier for developers to build and maintain the system. This simplicity can also make it easier for new users to understand its technology and functions.
Proven: Monolithic blockchains such as Bitcoin have proven their ability to operate securely and reliably since their inception. Their success has laid a solid foundation of trust and credibility for these monolithic blockchain networks.
Disadvantages of Monolithic Blockchain
Limited scalability: The single-layer design of monolithic blockchains can hinder their ability to scale effectively. As transaction volume increases, these networks can become congested, resulting in longer transaction processing times and higher fees.
Difficulty in upgrading: It can be challenging to implement changes and improvements in a monolithic blockchain due to its inflexible design. This rigidity makes it difficult for the network to adapt to emerging needs and technological advancements.
Modular blockchain
Modular blockchains, such as Nervos, use a layered architecture design that separates the main tasks performed by a blockchain network, including executing transactions, ensuring data availability, and reaching consensus on the true state of the blockchain. By separating these functions into different layers, modular blockchains aim to solve the "blockchain trinity" problem, which is the difficulty of blockchains being able to achieve security, scalability, and decentralization at the same time.
In a modular blockchain, the base layer focuses on security, decentralization, and interoperability, while other layers (Layer 2, etc.) provide scalability and programmability. This layered design contrasts sharply with monolithic blockchains, where transaction execution, consensus, and data availability all occur on the same layer.
Advantages of modular blockchain
Scalability: Modular blockchains can achieve greater scalability by offloading transaction processing and other resource-intensive tasks to Layer 2 networks. This enables them to process more transactions without compromising security or decentralization.
Security and Decentralization: The base layer in the modular blockchain is designed to be exceptionally secure and decentralized, laying a solid foundation for the entire blockchain network.
Flexibility and interoperability: Modular blockchains (such as Nervos) have a highly flexible base layer that supports a variety of cryptographic primitives, making it more interoperable than other Layer 1 and Layer 2 networks or even existing Internet protocols. This flexibility allows developers to run different virtual machines, such as the Ethereum Virtual Machine (EVM), directly within the base layer virtual machine (such as Nervos' CKB-VM).
Better user experience: Modular design and excellent interoperability enable developers to create universal applications for various blockchain users, wallets and even standard authentication protocols, bringing a more seamless user experience, lowering the entry barrier for new users, and simplifying the user interaction process of existing blockchains.
Future-proof: Modular blockchains are designed to adapt to changes and improvements in technology. By separating functionality into different layers, these networks can be updated or upgraded more easily without affecting the entire system. This makes modular blockchains more adaptable to the ever-changing needs and requirements of the blockchain industry.
Disadvantages of modular blockchains
Complexity: Compared with monolithic blockchains, the layered architecture of modular blockchains can be more complex and more challenging to develop and maintain. This complexity can also make it more difficult for new users to understand the technology.
Shorter History: As a newer blockchain design approach, modular blockchains have not been as extensively tested and proven as monolithic blockchains.
Summarize
Modular blockchains and monolithic blockchains each have their own advantages and disadvantages. Monolithic blockchains offer a simpler set of solutions that have been tested for a longer period of time, but face limitations in scalability and adaptability to new technologies. In contrast, modular blockchains adopt a layered architecture approach that enhances scalability, flexibility, and interoperability, but at the cost of greater complexity and a shorter history.
As the blockchain industry continues to evolve, these pros and cons must be carefully weighed when choosing a blockchain architecture for a specific use case. While monolithic blockchains may be suitable for certain applications that prioritize simplicity and time-tested performance, modular blockchains may be more suitable for projects that require broad scalability and adaptability to emerging technologies.
In the long run, both types of blockchains are likely to coexist, each catering to different needs and preferences in the diverse fields of blockchain applications. By understanding the core differences between modular and monolithic blockchain architectures, developers, investors, and users can make more informed decisions about the blockchain networks they participate in and support.