requirements on distributed transactions

• database sharding

• service-oriented transformation and more cross-service transactions

three scenarios for distributed transactions

• Cross-database distributed transactions
• Cross-service distributed transactions
• Hybrid distributed transactions

five distributed transaction solutions

• XA Specification
• TCC
• Saga
• Local-Message-Based Distributed Transactions
• Transactional-Message-Based Distributed Transactions

https://www.alibabacloud.com/blog/an-in-depth-analysis-of-distributed-transaction-solutions