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A Guide to Database Migration Service of AWS

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A Guide to Database Migration Service of AWS

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  1. A Guide to Database Migration Service of AWS One of the optimized options for migrating databases quickly and securely is the Amazon Web Service Database Migration Service (AWS DMS). The advantage here is that the source database is not shutdown during migration, thereby minimizing downtime for applications of organizations that depend on the database. DMS AWS enables you to migrate data between the most common and widely-used open-source and commercial databases.

  2. Types of database migration with DMS AWS.• Homogeneous database migration: It is a one-step and one-off process as all factors like schema structure, database codes, and data types match one another. This is possible because both the source database and the target database engines are compatible. Examples of this migration type are Oracle to Amazon RDS for Oracle, MySQL to Amazon Aurora, MySQL to Amazon RDS for MySQL, or Microsoft SQL Server to Amazon RDS for SQL Server.

  3. • Heterogeneous database migration: DMS AWS works differently in this case as the source database and the target database engines do not match. As a result, separate inputs are done for database codes, schema structure, and data types. The AWS Schema Conversion Tool is used to convert the schema and the source code of the source database to match that of the target database. Once done, DMS AWS migrates data from the source to the target database. Examples are Oracle to Amazon Aurora, Oracle to PostgreSQL, or Microsoft SQL Server to MySQL migrations.

  4. Benefits of DMS AWSThere are several benefits of DMS AWS.• User-friendly: With DMS AWS, there installing additional drivers and applications is not necessary as changes are not made at the source database. The migration process is started directly with just a few clicks on the AWS Management Console. This service is also be used for continuous data replication.• Negligible downtime: DMS AWS enables database migration with negligible downtime. Data changes made at the source during migration are continuously replicated to the target database.

  5. This allows the source database to be fully functional during migration. After completion of the process, the source database remains synchronized with the target as long as required and users can switch to the target database at a convenient time. • Supports most common databases: DMS AWS migrates data between common and commercial databases and supports both homogeneous and heterogeneous database migrations.

  6. • Cost-effective: DMS AWS is a low-cost service. Users pay only for the compute resources used during migration and additional log storage. A terabyte-sized database can be migrated for only $3. Comparatively, conventional database migration methods are quite costly.  • Continual replication: A DMS activity can be initiated either as a one-time migration or ongoing replication. In the second instance, the source and the target databases are kept in sync always and the ongoing replication activity will apply changes at source to the target continually with minimal latency. DMS AWS is very self-resilient and constantly monitors source and target databases, replication instance, and network connectivity. • AWS DMS ETLdata migration to awsdmsaws

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