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+## [2026-04-18] ingest | CTP Topic 72 Implementing an Enterprise DR Strategy using AWS Backup
+- Source file: raw/Cloud & DevOps/Public-Cloud-Learning-Sessions/01_AWS-Landing-Zone/ctp-topic-72-implementing-an-enterprise-dr-strategy-using-aws-backup.md
+- Status: ✅ 成功摄入
+- Summary: 使用 AWS Backup 实现企业级灾难恢复策略，涵盖 DR 与 HA 区别、RTO/RPO 定义、AWS Backup 架构、Vault Lock、跨账户备份
+- Concepts created: 灾难恢复（已有）
+- Entities created: AWS（已有）
+- Source page: wiki/sources/ctp-topic-72-implementing-an-enterprise-dr-strategy-using-aws-backup.md
+- Notes: 
+
+## [2026-04-18] ingest | CTP Topic 47 Enterprise Architecture Cloud Standards
+- Source file: raw/Cloud & DevOps/Public-Cloud-Learning-Sessions/01_AWS-Landing-Zone/ctp-topic-47-enterprise-architecture-cloud-standards.md
+- Status: ✅ 成功摄入
+- Summary: 企业云架构标准与 Landing Zone 框架，涵盖 Enterprise Architecture、Cloud Guardrails、Terraform IaC 和 Terragrunt
+- Concepts created: Enterprise Architecture（新增）, Cloud Guardrails（新增）
+- Entities created: Lindsay（新增）
+- Source page: wiki/sources/ctp-topic-47-enterprise-architecture-cloud-standards.md
+- Notes: 讲师 Lindsay 是有开发背景的企业架构师，强调应用团队输入对完善守护栏的重要性
+
+## [2026-04-18] ingest | CTP Topic 1 Gruntwork Landing Zone Architecture
+- Source file: raw/Cloud & DevOps/Public-Cloud-Learning-Sessions/01_AWS-Landing-Zone/ctp-topic-1-gruntwork-landing-zone-architecture.md
+- Status: ✅ 成功摄入
+- Summary: 基于 Gruntwork 的 AWS Landing Zone 架构设计，涵盖参考架构、联邦用户、CI/CD 流程和 Git 工作流
+- Concepts created: Reference Architecture, Federated User
+- Entities created: Gruntwork（已有）
+- Source page: wiki/sources/ctp-topic-1-gruntwork-landing-zone-architecture.md
+- Notes: Gruntwork 是拥有大量 Terraform 代码的组织，其代码经过多次实践验证
+
+## [2026-04-18] ingest | CTP Topic 51 Architecting with AWS Purpose-Built Databases
+- Source file: raw/Cloud & DevOps/Public-Cloud-Learning-Sessions/01_AWS-Landing-Zone/ctp-topic-51-architecting-with-aws-purpose-built-databases.md
+- Status: ✅ 成功摄入
+- Summary: AWS 专用数据库架构，讲解如何为现代应用选择合适的数据库（ DynamoDB、Aurora、DocumentDB、ElastiCache、Neptune、Timestream、Keyspaces）
+- Concepts created: Purpose-Built Database
+- Entities created: Femi George, Duolingo, Netflix, Peloton, Amazon DynamoDB, Amazon DocumentDB, Amazon ElastiCache, Amazon Neptune, Amazon Timestream, Amazon Keyspaces
+- Source page: wiki/sources/ctp-topic-51-architecting-with-aws-purpose-built-databases.md
+- Notes: 现代应用需考虑可伸缩性、全球低延迟交付和开发者访问；DBA 角色从平台管理转向应用创新
+
+## [2026-04-18] ingest | CTP Topic 46 NetApps on AWS
+- Source file: raw/Cloud & DevOps/Public-Cloud-Learning-Sessions/01_AWS-Landing-Zone/ctp-topic-46-netapps-on-aws.md
+- Status: ✅ 成功摄入
+- Summary: NetApp on AWS (CVO) 架构、部署模式、数据分层机制（EBS→S3）、安全加密与灾备方案（SnapMirror），企业级混合云存储方案
+- Concepts created: Cloud Volume ONTAP
+- Entities created: NetApp
+- Source page: wiki/sources/ctp-topic-46-netapps-on-aws.md
+- Notes: 当前生产约 15 个 NetApp 集群，1.3 PB 数据；支持 30 天自动分层到 S3
+
+## [2026-04-18] ingest | CTP Topic 17 Active Directory Services in Gruntwork AWS LZs
+- Source file: raw/Cloud & DevOps/Public-Cloud-Learning-Sessions/01_AWS-Landing-Zone/ctp-topic-17-active-directory-services-in-gruntwork-aws-lzs.md
+- Status: ✅ 成功摄入
+- Summary: 在 Gruntwork AWS Landing Zones 中集成和管理 Active Directory 服务，涵盖 R&D（swinford.net）和 SAS（intsas.local）域名规范
+- Concepts created: Gruntwork Landing Zone, Domain Join, SRE-provided AMIs
+- Entities created: Gruntwork, swinford.net, intsas.local, MIM, SMACKS Ticket
+- Source page: wiki/sources/ctp-topic-17-active-directory-services-in-gruntwork-aws-lzs.md
+- Notes: 旧的 infra 和 AST 域名已废弃，需迁移到新规范
+
+## [2026-04-18] ingest | CTP Topic 66 Exposing the differences between PostgreSQL RDS and Aurora
+- Source file: raw/Cloud & DevOps/Public-Cloud-Learning-Sessions/01_AWS-Landing-Zone/ctp-topic-66-exposing-the-differences-between-postgresql-rds-and-aurora.md
+- Status: ✅ 成功摄入
+- Summary: PostgreSQL on RDS 与 Aurora 的详细对比，涵盖架构、性能、成本、故障切换和高可用性优化。Aurora 适合大型数据库（10-20TB+），RDS 适合中小型数据库
+- Concepts created: Aurora, Multi-AZ, Blue-Green-Deployment
+- Entities created: Aurora
+- Source page: wiki/sources/ctp-topic-66-exposing-the-differences-between-postgresql-rds-and-aurora.md
+- Notes: Aurora RTO 30秒 vs RDS 2分钟；Aurora 使用 6 个 EBS 卷跨 3 个 AZ
+
 ## [2026-04-18] ingest | CTP Topic 14 Octane Hub on AWS Real life experience
 - Source file: raw/Cloud & DevOps/Public-Cloud-Learning-Sessions/01_AWS-Landing-Zone/ctp-topic-14-octane-hub-on-aws-real-life-experience-moving-production-services-i.md
 - Status: ✅ 成功摄入
@@ -1690,3 +1753,11 @@
 - Source page: wiki/sources/install-wsl.md
 - Notes: 
 
+## [2026-04-18] ingest | CTP Topic 28 AWS Tag Validation Tool
+- Source file: raw/Cloud & DevOps/Public-Cloud-Learning-Sessions/01_AWS-Landing-Zone/ctp-topic-28-aws-tag-validation-tool.md
+- Status: ✅ 成功摄入
+- Summary: AWS 标签验证工具，用于审计 EC2、安全组、负载均衡器、Lambda 函数的标签合规性，通过 YAML 配置文件定义预期值并生成 CSV 报告
+- Concepts created: Service Control Policies, Boto3
+- Source page: wiki/sources/ctp-topic-28-aws-tag-validation-tool.md
+- Notes: 与 Gruntwork Landing Zone 关联，标签验证用于 Landing Zone 治理 
+