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---
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title: "Amazon Aurora"
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type: entity
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tags:
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- AWS
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- Database
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- Cloud-Native
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- Relational Database
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sources:
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- ctp-topic-66-exposing-the-differences-between-postgresql-rds-and-aurora
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last_updated: 2026-04-23
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---
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## Overview
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Amazon Aurora 是 AWS 提供的云原生关系型数据库,采用 6 副本跨 3 可用区(AZ)的共享集群卷架构,相比传统 RDS 提供更高的性能、可用性和自动扩展能力。
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## Core Architecture
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- **Shared Cluster Volume**:跨 3 AZ 的 6 块 EBS 卷组成的共享存储,写入时自动复制到所有副本
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- **无需数据复制**:新增读副本时直接连接同一集群卷,无需重新复制数据
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- **Writer/Reader Endpoints**:独立的写入端点和读取端点,支持自动负载均衡
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## Key Advantages
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- **RTO 30 秒**:AZ 故障时恢复时间目标仅 30 秒
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- **自动扩缩容**:Aurora Serverless v2 支持按需自动扩缩(实例类型/版本/区域有限制)
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- **Aurora Global**:跨区域复制方案,支持托管式切换和故障转移
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- **Blue-Green Deployment**:Aurora MySQL 支持 Blue-Green 大版本升级(PostgreSQL 不支持)
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## Key Limitations
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- 最小规格和成本高于 RDS
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- Serverless v2 对实例类型、版本和区域有限制
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- 按 IO 收费,高 IO 场景成本可能较高
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- PostgreSQL 不支持 Blue-Green 部署
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## Cost Considerations
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Aurora 按 IO 计数收费,IO 理论上无上限(AWS 鼓励提供尽可能高的 IO 以增加收入)。适合超过 10-20 TB 的数据库或对 IO 性能有严格要求的场景。
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## Related Entities
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- [[Amazon RDS]]:传统关系型数据库托管服务
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- [[AWS]]:云服务提供商
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- [[EBS]]:Elastic Block Store,Aurora 的底层存储
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- [[ctp-topic-51-architecting-with-aws-purpose-built-databases]]:AWS 专用数据库架构
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- [[ctp-topic-66-exposing-the-differences-between-postgresql-rds-and-aurora]]:RDS vs Aurora 详细对比
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## Aliases
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- Aurora
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- Aurora PostgreSQL
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- Aurora MySQL
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- Amazon Aurora Database
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