Oracle Cloud Database MIgration and Integration 认证备考

Posted 2021-12-30 dingdingfish

参考

• https://blogs.oracle.com/maa/backuprecovery
• https://www.youtube.com/c/OracleDatabaseUpgradesandMigrations
• https://www.youtube.com/playlist?list=PLIUJ4jBaPQxxqwuI9wFUfChOjUCVTYKob 多租户迁移系列
• https://www.oracle.com/database/technologies/cloud-migration.html
• https://www.oracle.com/database/technologies/rac/zdm.html

Oracle Cloud Database Service Overview

Oracle Migration and Integration

Oracle Data Integrator

RMAN, Data Pump and Cloning to Migrate to OCI

Data Pump

不要使用SYS或SYSDBA调用Data Pump

Transportable Tablespace

Multitenant

RMAN

Migration Strategy

这里的AWS RDS实际是Oracle数据库，Non-CDB。

AWS RDS不提供操作系统级别访问。


RMAN恢复后，还需要转换成PDB，并加密。

GoldenGate

Zero Downtime Migration（ZDM）

https://blogs.oracle.com/maa/post/new-oracle-zero-downtime-migration-21c
https://blogs.oracle.com/maa/post/oracle-maximum-availability-architecture-and-chaos-engineering-part-1

上图和ZDM无关，是OCI Database Migration，也称为DMS（Database Migration Service）
https://blogs.oracle.com/dataintegration/post/elevate-your-database-into-the-cloud-using-oracle-cloud-infrastructure-database-migration

ZDM目前只支持源库为Linux平台。

ZDM 物理迁移只支持同版本的迁移：



Online用了Data Guard

Physical Offline用了RMAN

Logical Offline用了Data Pump

Migrating to Autonomous Database

• 不要用SYSDBA启动Data Pump。
• 尽量使用参数文件而非命令行。
• 总是导出为多个文件，%U生成两位数字，%L也一样，但可以扩展到两位以上。
• 总是排除统计信息
• 总是生成一致的导出，指定FLASHBACK_TIME
• 总是使用并行
• 总是移除列加密，以免与OCI中的表空间加密冲突
• 导出时使用压缩

一些小技巧：

• 使用VIEWS_AS_TABLES导出子集
• 导入时使用通配符指定基于URL的文件
• 导入时将IOT表转换为普通表
• 导入时对于PK和FK约束使用一致的命名规则
• 去除segment customization
• remap表空间，这对自治数据库很重要
• 对于自治数据库，导入导出时排除一些对象，如ADW排除索引，物化视图，ATP排除DBLINK和CLUSTER

Data Integration

Exam Topic

Sample Exam Questions

模考

2. Which type of Zero Downtime Migration (ZDM) can you use for Inflight Upgrade?
   Both Physical and Logical Migration is supported.
   Physical Migration only
   Logical Migration only
   ZDM does not support Inflight Upgrade.

3. You are using Data Pump to migrate your database to Autonomous Database (ADB). To which tablespace must you remap your source database tablespaces?
   USERS
   DATA
   SYSTEM
   UNDO

4. What are the constraints of using transportable tablespaces? (Choose two)
   The source and target platforms must match.
   The source and target character sets must match.
   The source and target database versions must match.
   The source and target time zone versions must match.

5. Which connectors are supported by the Oracle Data Integrator (ODI) web edition? (Choose three)
   IBM DB2
   Amazon S3
   MySQL
   Oracle Fusion Application
   Cloudera

6. Which statements are true for OCI GoldenGate Service? (Choose two)
   It supports the usage of Universal Credits.
   It requires any source environment to run Oracle GoldenGate Microservices.
   It is customer-managed.
   It requires an on-premises license for the Oracle GoldenGate software.

7. You need to migrate your on-premises 12c Non CDB to Cloud 12c. Which migration methods can you use? (Choose two)
   Transportable Databases
   Conventional Data Pump Export and Import
   Transportable Tablespaces
   Conventional RMAN Backup and Recovery

8. Which technologies can you use for Zero Downtime physical migration? (Choose two)
   Oracle GoldenGate
   Data Guard
   RMAN
   Data Pump