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How to Solve the Scalability Problem of Blockchain: In-Depth Discussion and Effective Strategies

bitpie
June 11, 2025

Introduction

With the rapid development of blockchain technology, more and more application scenarios and industries are beginning to adopt this disruptive technology. However, the scalability issue of blockchain remains one of the key factors limiting its widespread adoption. Scalability refers to the system's performance under high load. For blockchain, how to maintain efficient operation while handling a large number of transactions and users is a core problem that needs to be addressed.

How to Solve the Scalability Problem of Blockchain: In-Depth Discussion and Effective Strategies

In order to meet the rapidly evolving market demands, technical experts and researchers are actively exploring various solutions. This article will delve into the core of blockchain scalability issues, analyze their causes, and discuss currently feasible strategies for resolution.

The core of scalability issues

  • Current Limitations of Blockchain Technology
  • In the field of blockchain, especially on mainstream platforms such as Bitcoin and Ethereum, there are several significant scalability limitations. The main ones include:

  • Transaction throughputThe Bitcoin network's transaction processing capacity is limited to around 7 transactions per second, while Ethereum's limit is between 15 and 30. This is a huge gap compared to traditional payment networks like Visa, which can handle thousands of transactions per second.
  • Confirm the timeDuring peak periods, transaction confirmation times may increase, thereby affecting the user experience.
  • Transaction feesWhen network load increases, transaction fees rise significantly, resulting in higher transfer costs for users.
  • The root cause of scalability issues
  • Scalability issues mainly stem from the fundamental design of blockchain. Logically, a blockchain is a decentralized distributed ledger in which every node must verify all transactions. While this mechanism ensures security and transparency, it also reduces the system's responsiveness when dealing with high volumes of concurrent transactions.

    Solution strategies:

    In order to enhance the scalability of blockchain, various blockchain projects and researchers have proposed multiple solutions. The following are some of the more mature strategies currently available:

  • Layered architecture
  • The layered architecture of blockchain is an important strategy for enhancing scalability. By separating transaction processing from data storage, the overall performance of the system can be effectively improved.

  • Layer 1 (L1): The base layer, responsible for the core functions and security of the blockchain, such as Bitcoin and Ethereum.
  • Layer 2 (L2): An additional layer that handles large volumes of transactions, only writing the aggregated data to the main chain after the transactions are completed. This approach can significantly reduce the transaction burden on the main chain.
  • For example, the Lightning Network is a typical Layer 2 solution that enables fast, small-value payments by setting up payment channels, thereby reducing the traffic on the main chain.

  • (2) State Channel
  • A state channel is a strategy that allows participants to conduct transactions off-chain and only return to the main chain when necessary. This approach can handle a large number of transactions, such as gaming and micropayments, without interfering with the main chain.

    The advantage of state channels lies in greatly increasing transaction speed and reducing costs. After the transaction is completed, the final state is recorded on the main chain, thus preserving security while improving efficiency.

  • Sharding technology
  • Sharding technology divides the entire blockchain network into multiple sub-networks (or shards), allowing different transactions to be processed in parallel. Each shard operates independently from the main chain, enabling efficient transactions while reducing resource waste.

    For example, some projects divide user transactions during sharding based on account balances, transaction types, and other factors, which can effectively reduce the overall network pressure.

  • Optimization of consensus algorithms
  • Different consensus algorithms have a direct impact on scalability. Traditional Proof of Work (PoW) is inefficient in processing transactions, while newer consensus mechanisms such as Proof of Stake (PoS) or Delegated Proof of Stake (DPoS) can improve transaction processing capacity to a certain extent.

    By introducing more efficient consensus algorithms, network throughput can be significantly increased and transaction confirmation times reduced. For example, projects like Cardano and EOS use PoS to enhance network performance.

  • Data Compression and Optimization
  • Another way to improve blockchain scalability is through data compression and optimization. This includes optimizing the size of transaction data and adjusting the structure of blocks. By compressing data, the burden of storage and transmission can be reduced, thereby increasing processing speed.

    By using technologies such as Merkle trees, efficient storage and transmission of data can be achieved while ensuring data integrity.

  • Consortium chain and private chain
  • In certain enterprises or specific industries, consortium chains and private chains have inherent advantages over public chains in terms of scalability. Due to the limited number of participants, the transaction verification process is more efficient, enabling large-scale transactions to be carried out at a higher speed.

    For example, in the field of supply chain finance, enterprises can achieve fast and secure transactions and information sharing by building consortium blockchains.

    Practical Applications and Prospects

    The various solutions mentioned above have already been applied in multiple blockchain projects. For example, the launch of Ethereum 2.0 specifically addresses the scalability issues of the existing Ethereum network by adopting a layered architecture and a proof-of-stake mechanism. In addition, many emerging blockchain projects (such as Polkadot and Avalanche) are also actively exploring more flexible scalability solutions.

    In the future, as blockchain technology continues to evolve, solutions for scalability will become more diverse and refined, driving the application of blockchain across a wider range of industries. At the same time, attention must be paid to the security challenges of these solutions to ensure that improvements in scalability do not compromise the core security features of blockchain systems.

    Frequently Asked Questions

  • What is blockchain scalability?
  • Scalability of a blockchain refers to the system's ability to efficiently process and respond when faced with a large number of transactions and users. A highly scalable blockchain can support more users simultaneously while maintaining fast transaction confirmation times.

  • What is the impact of scalability issues on blockchain?
  • Scalability issues can lead to slow transaction processing and increased transaction fees, thereby affecting user experience and system reliability. Blockchains that cannot handle high-concurrency transactions may find it difficult to meet the demands of commercial applications.

  • How does a layered architecture address scalability issues?
  • Layered architecture separates transaction processing from data storage, allowing additional layers to handle a large number of transactions, thereby reducing the burden on the main chain while improving overall system performance.

  • What are the advantages of state channels?
  • State channels can efficiently process a large number of transactions without interfering with the main chain, recording only the final state on the main chain, which effectively increases transaction speed and reduces costs.

  • Why are consensus algorithms crucial for scalability?
  • Different consensus algorithms affect the efficiency of transaction verification. Choosing a more efficient consensus mechanism (such as PoS) can significantly enhance the processing capacity of the blockchain, thereby improving scalability.

    Through continuous technological iteration and innovation, the scalability issues of blockchain will be gradually resolved, laying the foundation for the development of the future digital economy.

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