© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved. Database Migration Service Overview Jason Volpe, April 2020
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© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Database Migration Service Overview
Jason Volpe,
April 2020
© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
AWS Database Migration Service
AWS Database
Migration Service
(AWS DMS)
AWS Database Migration Service helps you migrate
databases to AWS quickly, securely, and reliably
The source database remains fully operational during the
migration, minimizing downtime to applications that rely on
the database.
Start your first migration in 10 minutes or less
© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Initial Data Load (table by table)
Replication instance
Source Target
© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Change Data Capture (CDC) and Apply to Target
Replication
instance
Source Target
Update
t1 t2
t1
t2
Apply
Change
after bulk
loadTransactions
© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Keep your apps running during the migration
Customer On-Premises
Application users
AWS
VPN,
Direct Connect
o Start DMS replication instance
o Connect to source and target DBs
o Select tables, schemas, or DBs
Let AWS DMS create tables, load data, and keep them in sync
DMS
Replication
Instance
© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Keep your apps running during the migration
Application users
AWS
o Start DMS replication instance
o Connect to source and target DBs
o Select tables, schemas, or DBs
Let AWS DMS create tables, load data, and keep them in sync
Switch applications over to the target at your convenience
Dismantle migration infrastructure
© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
What else can DMS do? – Take it all, or Not
Source Target
Replication instance
© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
What else can DMS do? – Consolidate DBs
Replication
instance
Source Target
Source
Source
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What else can DMS do? – Split DB
Replication
instance
Source Target
Target
Target
© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
AWS Schema Conversion Tool (SCT)
The AWS Schema Conversion Tool helps automate many database schema and
code conversion tasks when migrating between database engines or data
warehouse engines
Integrates with AWS DMS to implement schema conversion during migration
Features
• Microsoft SQL Server schema conversion to Amazon Aurora, MySQL, MariaDB, and PostgreSQL
• Database Migration Assessment report for choosing the best target engine
• Code browser that highlights places where manual edits are required
• Secure connections to your databases with SSL
© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
SCT helps with converting Tables, Views, and Code
• Sequences
• User-defined types
• Synonyms
• Packages
• Stored procedures
• Functions
• Triggers
• Schemas
• Tables
• Indexes
• Views
© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
SCT Migration Assessment Report
• Assessment of migration
compatibility of source databases
with open-source database
engines – RDS MySQL, RDS
PostgreSQL and Aurora
• Recommends best target engine
• Provides details level of efforts to
complete migration
© 2019, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Old World to Aurora Migration Playbooks
• Topic-by-topic overview of Oracle to Aurora
PostgreSQL migrations and “hands-on” best practices
• How to migrate from proprietary features and the
different database objects
• Migration best practices
• SQL Server to Aurora MySQL
• Oracle to Aurora MySQL
• https://aws.amazon.com/dms/resources/
SCT DMS Playbook
Schema Data Best Practices
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