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標題: 架构演进：打破二选一的宿命 [打印本頁]

作者: saddammolla 時間: 2026-1-25 11:56
標題: 架构演进：打破二选一的宿命

In the history of database development, the emergence of NewSQL represents an architectural revolution that "wins the best of both worlds." In the cloud-native era of 2026, it has become the cornerstone for supporting global core business systems, perfectly solving the pain points of NoSQL's inability to guarantee absolute data accuracy and the difficulty of traditional relational databases (RDBMS) in horizontal scaling.

For a long time, architects have been forced to choose between the consistency of SQL and the scalability of NoSQL . NewSQL has changed the game:

1. Scalability like NoSQL

Traditional databases (such as single-machine MySQL) typically rely on "vertical hardware upgrades" when encountering performance bottlenecks. NewSQL, however, employs a transparent sharding architecture, where data is automatically partitioned and distributed across hundreds or thousands of ordinary servers. When business volume doubles, you can simply add nodes and achieve near-linear performance growth.

2. Strict consistency like SQL (ACID)

This is NewSQL's true killer feature. Unlike the "eventual consistency" common in NoSQL, NewSQL utilizes distributed consensus protocols such as Raft or Paxos , ensuring that every transaction satisfies ACID properties even in globally deployed clusters.

Atomicity (A): A transfer operation either succeeds globally in a synchronized manner or is completely rolled back.
Consistency (C): The balance retrieved at any time and from any location is accurate.
Isolation (I) and Durability (D): Complex concurrent operations do not interfere with each other, and data is never lost.

Technical support in 2026: The evolution of distributed transactions

By 2026, NewSQL no longer relies on expensive atomic clocks (like the early Spanner), but instead achieves more efficient distributed lock management through **Logical Clocks (TSO) or Hybrid Logical Clocks (HLC)**. This means that even in ultra-large-scale clusters spanning multiple regions, transaction latency is compressed to extremely low levels.

Representative products:

Google Spanner / CockroachDB: A pioneer in globally distributed SQL.
TiDB / OceanBase: While maintaining high compatibility with MySQL/Oracle, it achieves extreme elasticity and financial-grade reliability.

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