Category: Advanced (300)

PostgreSQL is considered one of the top database choices when customers migrate from commercial databases such as Oracle or SQL Server. AWS provides two managed PostgreSQL options: Amazon Relational Database Service (Amazon RDS) for PostgreSQL and Amazon Aurora PostgreSQL-Compatible Edition. Moving from Oracle to Amazon RDS for PostgreSQL or Amazon Aurora PostgreSQL-Compatible Edition can require […]

Customers use semi-structured or unstructured data storage for various business use cases, which is schema-less and flexible in nature. One such type of semi-structured data is JavaScript Object Notation (JSON). JSON stores data in the form of KEY, VALUE, LIST, and ARRAY formats. Oracle Database stores JSON object data in CLOB data type columns. PostgreSQL […]

With the evolution of microservice-based architectures, organizations are increasingly adopting purpose-built databases. Occasionally, businesses need guidance on which cloud service and solutions are best for them, as well as a plan for helping with the migration. When performing heterogeneous database migrations, you might encounter problems with attribute patterns on NoSQL compared to traditional relational database […]

Most migrations from on-premises Oracle to Amazon Relational Database Service (Amazon RDS) for Oracle use EXPDP/IMPDB or Transportable Tablespaces using RMAN. Depending on the size and complexity, migrations are often split at the schema level and table level. In this post, we present a solution to help you identify missing schema objects in the target […]

Company policies usually do not allow database instances to have a public endpoint unless there is a specific business requirement. Although that protects those resources from public access over the internet, it also limits how users can connect to them from their computers. Frequently, database administrators and development teams try to overcome that restriction by […]

End of support notice: On March 31, 2027, AWS will end support for Amazon RDS Custom for Oracle. Existing customers can continue using the service until March 31, 2027. After March 31, 2027, you will no longer be able to access RDS Custom for Oracle resources including database instances, snapshots, and custom engine versions. We […]

Windows Authentication offers a secure and efficient mechanism for authentication management in Microsoft SQL Server. Many customers use Microsoft Entra ID (previously Azure AD) as their identity provider for Windows authentication. With the launch of support to join Amazon RDS for SQL Server to self-managed Active Directory, you can now join your Amazon Relational Database […]

When dealing with multiple database engines or schemas that share data with each other, you’re faced with the difficulty of establishing cross-engine database connectivity. To overcome this challenge, PostgreSQL offers foreign data wrappers (FDW), which are libraries that facilitate communication with external data sources by abstracting the complexities of data source connection and data retrieval. […]

When you’re considering migrating from on premises to the AWS Cloud, the spotlight is firmly on database transitions. After you migrate the schemas and business logic, data migration strategies are determined by factors such as available downtime, database size, and data complexity. Homogeneous migrations, like those within Oracle, often rely on tools such as Oracle […]

In Part 1 of this series, we addressed failures related to the source, network, task, and replication instance when migrating from Oracle to Amazon Relational Database Service (Amazon RDS) for PostgreSQL using AWS Database Migration Service (AWS DMS). In this post, we discuss failure scenarios pertaining to validation and target database failure, and share mitigation […]