This webinar is to discuss how AWS Database Migration Service helps you migrate local database to the AWS Cloud environment, quickly and securely, and make sure the source database remains fully operational during the migration, minimizing downtime to applications that reply on the database. You will also learn how to lay down the plan for database migration for your company. This is a level 200 webinar that covers introduction to AWS Database Migration Service (DMS) and AWS Schema Conversion Tool (SCT), tips to swiftly migrate existing databases to cloud, best practices of database management on cloud plus a number of successful use cases.

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Dickson Yue
AWS Solutions Architect
Jul 24, 2018
Getting Started with
Amazon Database Migration Service

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Sponsor

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How can I get to the cloud?
How will my on-premises data migrate to the cloud?
How can I make it transparent to my users?
Afterwards, how will on-premises and cloud data interact?
How can I integrate my data assets within AWS?
Can I get help moving off of commercial databases?

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• Multi-engine support: Amazon Aurora, MySQL,
MariaDB, PostgreSQL, Oracle, SQL Server
• Automated provisioning, patching, scaling,
backup/restore, failover
• High availability with RDS Multi-AZ
– 99.95% SLA for Multi-AZ deployments
Amazon Relational Database Service

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The cloud makes things cheaper, easier, better
• Lower TCO because we manage the muck
• Get more leverage from your teams
• Focus on the things that differentiate you
• Built-in high availability and cross-region
replication across multiple data centers
• Available on all engines, including
base/standard editions, not just for
enterprise editions
• Now even a small startup can leverage
multiple data centers to design highly
available apps with over 99.95% availability

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Migration approach
Rehost, Re-platform
Like to like DB migration

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Migration options
If you’re not switching engines, native tools:
• SQL Server: bak file import, log shipping, Always on
Asynchronous-Commit Availability Mode
• MySQL: mysql_dump, read replicas
• Oracle SQL Developer, Data Pump, Export/Import
• PostgreSQL: pg_dump, read replicas
• SAP ASE: bcp
• Or AWS DMS

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Migration approach
Re-architecture
Switch DB engine

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Database migration process
Source
Oracle Database on premises
in EC2 or RDS
Source
Oracle Database on premises
in EC2 or RDS
AWS Schema Conversion Tool
Target
Amazon Aurora PostgreSQL
Target
Amazon Aurora PostgreSQL
Step 1
Step 2
AWS Database Migration Service

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1. SCT - Overview

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Assessment with SCT
1. Source Schema
2. Action items
3. Target Schema
4. Schema element details
5. Edit window

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Database migration assessment
Connect SCT to source
and target databases
Run assessment report
Read executive
summary
Follow detailed
instructions

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SCT – Assessment report

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Granularity of the messages in the report

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Use SCT to convert the SQL code in your C++, C#,
Java

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Supported Conversions – OLTP
*MySQL means any of Aurora, MySQL, MariaDB
Source Engine Target Engine
Microsoft SQL Server
(version 2008 and later)
Amazon Aurora (MySQL or PostgreSQL), Microsoft
SQL Server, MySQL, PostgreSQL
Oracle
(version 10.2 and later)
Amazon Aurora (MySQL or PostgreSQL), MySQL,
Oracle, PostgreSQL
PostgreSQL
(version 9.1 and later)
Amazon Aurora (MySQL), MySQL, PostgreSQL
MySQL
(version 5.6 and later)
Amazon Aurora (PostgreSQL), MySQL, PostgreSQL

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2. DMS - Overview

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• Start your first migration in 10 minutes or less
• Keep your apps running during the migration
• Replicate within, to or from Amazon EC2 or RDS
• Move data to the same or a different database engine
AWS
Database Migration
Service

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Customer
premises
Application users
AWS
Internet
VPN
Keep your apps running during the migration
® Start a replication instance
® Connect to source and target
databases
® Select tables, schemas, or
databases
® Let AWS Database Migration
Service (AWS DMS) create
tables, load data, and keep
them in sync
® Switch applications over to
the target at your convenience
AWS
DMS

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Load is table by table
Replication instance
Source Target

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Change data capture (CDC) and apply
Replication instance
Target
Transactions
Change apply after bulk load
t1
t2
Source
t1 t2
Update

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Source
Target
What else can I do?
Source
Source
Replication instance

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What else can I do? Target
Source Target
Target
Replication instance

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Source
Take it all—or not
Target
Replication instance

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Homogenous or heterogeneous
SQL Server MySQL
Oracle Oracle
Aurora
Amazon S3

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When to use DMS and SCT? Modernize
Modernize your database tier
• Commercial to open-source
• Commercial to Amazon Aurora
Modernize your warehouse
• Commercial to Amazon Redshift
Amazon
Aurora
Amazon
Redshift
Amazon S3
Amazon
DynamoDB

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Demo

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Database migration process - SCT
Source
Oracle Database on premises
in EC2 or RDS
Source
Oracle Database on premises
in EC2 or RDS
AWS Schema Conversion Tool
Target
Amazon Aurora PostgreSQL
Target
Amazon Aurora PostgreSQL
Step 1
Step 2
AWS Database Migration Service

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Database migration process - DMS
Source
Oracle Database on premises
in EC2 or RDS
Source
Oracle Database on premises
in EC2 or RDS
AWS Schema Conversion Tool
Target
Amazon Aurora PostgreSQL
Target
Amazon Aurora PostgreSQL
Step 1
Step 2
AWS Database Migration Service

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CDC

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Summary
Source
Oracle Database on premises
in EC2 or RDS
Source
Oracle Database on premises
in EC2 or RDS
AWS Schema Conversion Tool
Target
Amazon Aurora PostgreSQL
Target
Amazon Aurora PostgreSQL
Step 1
Step 2
AWS Database Migration Service

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Remember to complete
your evaluations!

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Q&A