Oracle zdm Migrate Amazon RDS Oracle to Oracle Autonomous 2021 Kamalesh Ramasamy Sangam21 AIOUG

Oracle Zero Downtime Migration
Migrating Amazon RDS to Oracle Autonomous
Top DB Cloud Migration Challenges & benefits
Kamalesh Ramasamy
Consulting Member of Technical Staff
Oracle Database Cloud Development
December 2021

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only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code,
or functionality, and should not be relied upon in making purchasing decisions. The development,
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at http://www.oracle.com/investor. All information in this presentation is current as of September 2019
and Oracle undertakes no duty to update any statement in light of new information or future events.
Safe Harbor
Copyright © 2019 Oracle and/or its affiliates.

Agenda
1. Database migration benefits
2. Top DB Migration Challenges
3. ZDM Migration Workflow Overview
4. ZDM Chained Useraction
5. ZDM Automation Capabilities
6. ZDM Amazon RDS Oracle to ADB
7. ZDM 21.3 upcoming features
8. Questions

Copyright © 2021, Oracle and/or its affiliates
Focus on business,
not infrastructure
Built for
performance
Continuous threat
monitoring
Much lower
operational cost
On-demand usage
and scaling
Benefits of Migrating to Oracle DB Cloud

Capacity planning
Database undo / redo space sufficiency,
Storage for data staging, network
connectivity, bandwidth
Estate Analysis
Large DBs, legacy, missing prerequisite
patches, one-off patch applied, Storage
for data staging, Datapatch, POC
Domain Expertise
Database & cloud Expertise, Tools &
utilities optimization, Optimal defaults,
Prerequisites
Estate Management
Fleet database migration, inventory,
Execute & monitoring the migration,
Credential sharing
Failure Diagnosis
Database insight on failures, Database
server access requirement
Assessing DB readiness
Online vs offline , Cloud compatibility
checks, TDE, Unsupported datatypes,
privileges, role grants
Custom Migration Actions
Streamlining Migration process, Pre or
post checks specific to DB, Datapatch
Post migration validation
Post migration database & application
optimization, mview refresh, fixing invalid
objects
Top Database Migration Challenges
5

Zero Downtime Migration
Simple Comprehensive Fleet Scale
Single Button Approach
Extensive Prechecks
Extensive post checks
Pause - Resumable
Dry-run option
Centralized
Scheduled Operations
Command Deck
Audit Trail
MAA Compliant
Customizable Workflow
Migrations in Parallel
Jobs Framework

ZDM - Supportability Matrix
Oracle
Version
Source Platforms Target platforms
7
Oracle OCI
Db System
ODA
*Dedicated
&
Shared
*Dedicated
&
Shared
Amazon RDS
Oracle
EXADATA
Cross
Platform
On-Premise

ZDM CLI
• Migrate database - ( job ID is assigned per migration task)
zdmcli migrate database -rsp <response file>
{-eval | -listphases | -pauseafter <phase>}
• Query Job
zdmcli query job -jobid <job-id>
• Resume Job
zdmcli resume job -jobid <job-id>
• Abort migration
zdmcli abort job -jobid <job-id>
• Suspend migration
zdmcli suspend job -jobid <job-id>
• Audit migration
zdmcli audit job -jobid <job-id>

Discover
Identify your on-premises
databases, migration method
Migrate – Execute & Monitor
Execute Oracle ZDM migration and
monitor the migration
ZDM Migrate | Query | Resume
Assess
Ensure the databases are
ready for migration.
POC the migration strategy
ZDM Dry-Run
Cut to Production
App owners to optimise & perform database
and application performance validation
ZDM - Custom Useraction
Migration Process & Oracle ZDM
9

ZDM Migration Methods
Migration Method High Availability Technology Data Transfer Medium
PHYSICAL
Block Copy
OFFLINE
Backup* - Restore
Oracle RMAN 1. Oracle Cloud Object Store
2. Oracle ZDLRA
3. Shared Storage – NFS
4. Direct Restore from
Service
ONLINE
Backup* - Restore
Physical Standby -
Switchover
Oracle RMAN
Oracle Data Guard -
LOGICAL
SQL Unload - Reload
OFFLINE
Export – Import
Oracle Data Pump 1. Oracle Cloud Object Store
1. oci-cli
2. Shared Storage – NFS
3. Secure Copy
4. Database link
5. Amazon S3
ONLINE
Export – Import
Extract - Replicat
Oracle Data Pump
Oracle Golden Gate
* - Backup Optional – Pre-Existing backup can be used

ZDM Migration Automation Capabilities
• Single button end-to-end automation
• Controlled flight through workflow of a series of phases
• Customize workflow with useraction
• Pause-Resume or resume from point of failure
• RMAN / DataPump / GG operation with optimal defaults
• Continuous progress Monitor and log upload
• Expedites upload of Dumps to OSS in parallel
• Bastion support
11 Confidential – © 2021 Oracle Internal/Restricted/Highly Restricted

• Customer-specific script insertions into the ZDM Automation workflow
• Customer develops Custom Useractions per requirement
• Types of useractions
Useractions
© 2021 Oracle
1. Source useraction - Execute on Source Database
2. Target useraction - Execute on Target Database (ADB & Non-
ADB)
3. Chained useraction
• Associated with both Source and Target phase
• Output of Source action utilized in Target User Action

1. Register Source phase Action - get_ddl1
zdmcli add useraction -useraction get_ddl1
-phase ZDM_VALIDATE_SRC
-pre
-optype MIGRATE_DATABASE
-runscope ONENODE -onerror ABORT
-actionscript /scripts/useraction_src.sh
Source Useraction
© 2020 Oracle

2. Register Target Phase action ‘from_ddl’ with -outputfrom get_ddl1
zdmcli add useraction –useraction from_ddl
-phase ZDM_VALIDATE_TGT
-pre
-optype MIGRATE_DATABASE
-runscope ONENODE
-onerror ABORT
-actionscript /scripts/useraction_create_ddl_ts.sql
-outputfrom get_ddl1
Target Useraction Contd….
© 2021 Oracle

3. Associate registered useractions to Custom action Image
zdmcli add imagetype -imagetype CUSTOMER_OPS_1
-basetype CUSTOM_PLUGIN
-useractions get_ddl1,from_ddl
4. Execute migration job with associated image.
zdmcli migrate database -rsp /home/atps_export_ua.rsp
-imagetype CUSTOMER_OPS_1
Chained Useraction Contd….
© 2021 Oracle

1. Validate the Dump Transfer route end to end
2. Estimate the dump size
3. Timezone compatibility check
4. Verifies and ensures Source Database for GoldenGate requirements
• Archive log mode and Minimal supplemental logging
• GGADMIN has required privileges
• Parameter streams_pool_size is set to optimal default
• GoldenGate bug fixes are present
• Verify GoldenGate supported data types
Confidential – © 2021 Oracle Internal/Restricted/Highly Restricted
16
Precheck
Logical Migration Automation Capabilities

1. Executes CPAT as part of the workflow
2. Generates necessary fixup for CPAT BLOCKERS / WARNINGS
3. Fixup Scripts made available in Source Database Server
4. Customer to review and execute
5. Helps failproof CPAT compliance
Automated Fixup script generation
© 2021 Oracle
Logical Migration Automation Capabilities Contd…

1. Allows AutoCREATE or AutoREMAP of Tablespaces
2. Discovers the Tablespaces associated with migrating schemas
3. Skips the source DB tablespaces that are in REMAP clause
4. Skips tablespaces that already exists in Target
5. AutoREMAP enforced for ADB-S target
6. Allows SMALLFILE to BIGFILE tablespace Conversion
1. BIGFILE enforced for ADB-D target
© 2021 Oracle
Tablespace Handling
Logical Migration Automation Capabilities Contd…

• Allows schemas and objects to be Excluded or Included
• Applies default excludes
• Ignores ambiguous Exclude of objects on conflict
19 Confidential – © 2021 Oracle Internal/Restricted/Highly Restricted
Objects always excluded Objects listed in view KU_NOEXP_VIEW
Objects owned by Oracle-maintained users, and ggadmin or c##ggadmin
users.
Object types always excluded ADW-S: CLUSTER, DB_LINK, INDEX, INDEXTYPE
ATP-S, ATP-D, ADW-D: CLUSTER, DB_LINK, STATISTICS
Include & Exclude Objects

• Recommended defaults taken
• Only Configurable parameters exposed
• Dumps are always Compressed & Encrypted
• Data Pump parallelism automated based on OCPU count of Target
• Knowledge base on Data Pump behavior for migrations
• Known and expected Ignorable errors
• Compliance with Autonomous Database migration requirements - Transform
Parameters
https://docs.oracle.com/en/cloud/paas/autonomous-database/adbsa/load-data-
data-pump.html#GUID-297FE3E6-A823-4F98-AD50-959ED96E6969
20
Data Pump

• Oracle Cloud OSS (CURL or OCI CLI)
• Amazon S3
• Shared path (NFS)
• Secure Copy
• DBLINK
Transfer Server
• Transfer dumps from Non-DB Server.
• Overcome connectivity constraints
• Reduces workload on DB server
• Utilize oci cli to upload to OSS
© 2020 Oracle
Dump Transfer Methodologies

• Automate GG Extract & Replicat between source and Target
• Stores database credentials in GoldenGate credential store
• Creates Heartbeat tables for Source and Target databases
• Enables schema-level supplemental logging for source schemas
• Creates Checkpoint table for Target ADB
• Creates & Monitors Replication
• Switchover
22
GoldenGate

Oracle ZDM – MIGRATE AMAZON RDS ORACLE TO ADB
ZDM EXPORTS RDS
TRANSFERS DUMPS TO S3
Export Data Pump Dumps to local DB storage
Transfer the Data Pump Dumps to S3 & Monitor
EXECUTE ZDM MIGRATE
Prepare the ZDM RSP
Ensure dry-run and perform migration
ZDM IMPORTS FROM S3 TO ADB
Perform import of Data Pump Dumps to ADB using AWS S3 Access
credentials
APP CUTOVER
Perform post validation and application cut over.
PREREQUISITES
Ensure AWS S3 integration
Generate AWS S3 credentials
Ensure RDS Instance and S3 bucket are in same region
23
Oracle
Database
Migration

24
Database
Migration
RSP Parameter
SOURCEDATABASE_ENVIRONMENT_NAME=AMAZON
SOURCEDATABASE_ENVIRONMENT_DBTYPE=RDS_ORACLE
Choose the source environment
SOURCEDATABASE_ADMINUSERNAME=
SOURCEDATABASE_CONNECTIONDETAILS_SERVICENAME=
SOURCEDATABASE_CONNECTIONDETAILS_PORT=
Specify the source endpoint information
SOURCEDATABASE_CONNECTIONDETAILS_TLSDETAILS_DISTINGUISHEDNAME=
SOURCEDATABASE_CONNECTIONDETAILS_TLSDETAILS_CREDENTIALSLOCATION=
Specify the source endpoint TLS information

25
Database
Migration
RSP Parameter
Specify Amazon S3 Bucket Access details
DUMPTRANSFERDETAILS_S3BUCKET_NAME=
DUMPTRANSFERDETAILS_S3BUCKET_REGION=
DUMPTRANSFERDETAILS_S3BUCKET_ACCESSKEY=
DATAPUMPSETTINGS_EXPORTDIRECTORYOBJECT_NAME=
Specify Amazon RDS Oracle export directory object name
DATATRANSFERMEDIUM=AMAZONS3 OR DBLINK
Choose the DATA Transfer Medium
Contd…

Migrating
Amazon RDS Oracle
to
Oracle Autonomous Database
26
Oracle
Database
Migration
Oracle ZDM DEMO
Dec 2021

Features coming soon
ZDM 21.3 Upcoming release
Copyright © 2021, Oracle and/or its affiliates | Confidential: Restricted
27
Logical Migration
Newer methods
• Migrate Metadata first
• Parallel migration of schemas
• Logical migration to EXADATA
and ODA (as target)
• Auto-retry on JDBC failure
Migrating Amazon RDS
Improved
• Online Logical migration
• Support for non-autonomous
target database
• CPAT invocation for RDS
Framework
Improvements
• Suspend ongoing migration
• Additional validations
• Log Upload to Data bucket
Physical Migration
Newer methods
• Restore from service
• Support use of Oracle
DataGuard Broker

Questions ?
28
Automated Workflow
Migrate with greater efficiency
Using best suited migration
method
Seamless Compliance
Reduce risk with complete
MAA compliance across
migration methods
Synergize Migration
Ensure greater synergy and
compliance across organization
in migrating their Database
workload to Oracle Cloud

References
General
https://www.oracle.com/database/technologies/rac/zdm.html
https://docs.oracle.com/en-us/iaas/Content/Database/Tasks/migrating.htm
https://www.oracle.com/database/migrate-database-to-cloud/
https://www.oracle.com/cloud/what-is-cloud-computing/
What's New in 21.2
•Migrate from Amazon Web Services RDS to Oracle Autonomous Database
•RMAN Active Database Duplication and Restore From Service Support
•Skip the Full Backup Phase Using an Existing RMAN Backup
•Migrate Databases on IBM AIX and Solaris

Our mission is to help people see data
in new ways, discover insights,
unlock endless possibilities.

Oracle zdm Migrate Amazon RDS Oracle to Oracle Autonomous 2021 Kamalesh Ramasamy Sangam21 AIOUG

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