What Is Oracle Database@AWS?
Oracle Database@AWS is a powerful cloud service that allows Oracle Exadata infrastructure, fully managed by Oracle Cloud Infrastructure (OCI), to run directly inside an AWS data center. This unique integration enables organizations to deploy and operate mission-critical Oracle databases closer to their AWS applications, without sacrificing performance, reliability, or enterprise-grade features.
In simple terms, Oracle Database@AWS combines the performance of Oracle Exadata with the flexibility and ecosystem of Amazon Web Services (AWS)—bringing the best of both worlds into a single, seamless environment.
Oracle Database@AWS High-Level Architecture
At a high level, Oracle Database@AWS consists of:
- AWS Cloud
- AWS Region
- AWS Availability Zone
- Virtual Private Cloud (VPC)
- ODB Network (Oracle Database Network)
- OCI Child Site
- Oracle Exadata Infrastructure
All of these components work together inside an AWS data center while remaining logically managed by Oracle Cloud Infrastructure.
Understanding the Core AWS Components
AWS Cloud, Region, and Availability Zone
The AWS Cloud is Amazon’s global cloud platform.
An AWS Region is a specific geographic location (for example, ap-south-1), and each region contains multiple Availability Zones (AZs).
An Availability Zone is a physically isolated data center with:
- Independent power
- Separate cooling
- Dedicated network connectivity
Oracle Database@AWS deploys Exadata infrastructure inside one of these AWS Availability Zones, ensuring low latency and high availability.
Virtual Private Cloud (VPC)
The Virtual Private Cloud (VPC) is a logically isolated virtual network within AWS. It hosts:
- Amazon EC2 application servers
- Routing, security groups, and network access controls
These application servers communicate with Oracle databases using ODB Peering, ensuring secure and private connectivity.
The OCI Child Site Explained
An OCI Child Site is one of the most important concepts in Oracle Database@AWS.
What Is an OCI Child Site?
- A physically separate Oracle-managed data center
- Located inside an AWS Availability Zone
- Acts as an extension of an OCI Region and Availability Domain
Although the Exadata hardware physically resides in AWS, it is:
- Logically part of OCI
- Managed using OCI control planes
- Governed by Oracle’s operational standards
This design allows customers to benefit from AWS proximity while retaining OCI’s enterprise database management.
Exadata Infrastructure Architecture in AWS
Key Components
- Database Servers
Host one or more Oracle Database VMs. - Storage Servers
Provide ultra-fast, redundant storage. - High-Speed Network Fabric
Ensures low-latency communication between database and storage layers.
VM Clusters
Each database server can run multiple Virtual Machines (VMs), allowing:
- Workload isolation
- Flexible scaling
- Multiple databases per cluster
Provisioning & Management
VM clusters can be created and managed using:
- AWS Console
- CLI
- APIs
During provisioning, you define:
- Number of database servers
- Number of storage servers
- Exadata model (e.g., X11M)
- AWS Availability Zone
Oracle Database Network (ODB Network)
The ODB Network is a dedicated, isolated network created specifically for Oracle Exadata deployments within AWS.
Subnet Types
- Client Subnet
- Used for application-to-database traffic
- Connects Exadata VM clusters to application servers
- Backup Subnet
- Used exclusively for database backup operations
- Ensures secure and reliable data protection
CIDR Requirements
- Separate CIDR ranges are required for:
- Client subnet
- Backup subnet
This isolation guarantees:
- High performance
- Improved security
- Predictable network behavior
ODB Peering: Secure Connectivity to AWS Applications
ODB Peering establishes a private network connection between:
- AWS VPC (application layer)
- ODB Network (database layer)
Why ODB Peering Matters
- Enables Amazon EC2 instances to access Oracle databases securely
- Avoids public internet exposure
- Delivers low-latency, high-throughput connectivity
Multi-VPC Access
For larger architectures:
- AWS Transit Gateway
- AWS Cloud WAN
can be used to connect multiple VPCs to a single ODB Network.
Key Benefits of Oracle Database@AWS
1. Simplified Migration
- Full Oracle Exadata compatibility
- Minimal refactoring
- Faster lift-and-shift from on-prem or OCI
2. Low-Latency Connectivity
- Databases run inside AWS data centers
- Ideal for latency-sensitive applications
3. Simplified Billing, Management & Operations
- Streamlined operations
- Familiar Oracle and AWS tools
- Reduced operational complexity
4. Seamless AWS Integration
Works natively with:
- EC2
- VPC
- IAM
- CloudWatch
- S3
Comparing Database Services in Oracle Database@AWS
| Feature | Oracle Exadata Database Service | Oracle Autonomous Database |
|---|---|---|
| Usage | Fully managed dedicated infrastructure; database operational monitoring handled by customer | Fully managed database service; operational monitoring handled by Oracle |
| Scalability | Very high – manual sizing of disks, compute, and clusters | High – automatic elastic scaling |
| Performance | Ultra-low latency, Exadata-level performance | Comparable performance with optimized automation |
| Migration Ease | High – full Exadata compatibility | High – similar migration tools available |
| Management | Manual management and administration | Fully managed with automated admin tasks and optional self-tuning |
| Feature Set | Full Oracle feature set, including RAC | Full feature set, optimized for autonomy |
| Integration | Seamless integration with EC2, VPC, IAM, CloudWatch, S3, etc. | Equally seamless across the AWS ecosystem |
Oracle Exadata Database Service
- Dedicated infrastructure
- Customer-managed operations
- Ultra-low latency
- Full Oracle feature set (including RAC)
Best for:
Organizations needing maximum control and customization
Oracle Autonomous Database
- Fully managed by Oracle
- Automatic scaling
- Self-tuning and self-patching
- Reduced operational overhead
Best for:
Teams seeking hands-off database operations
Final Summary
Oracle Database@AWS delivers a unique hybrid-cloud experience, allowing enterprises to run Oracle Exadata databases directly inside AWS data centers while retaining OCI’s management and reliability.
What You Learned
- What Oracle Database@AWS is
- Its key architectural components
- OCI Child Site and Exadata integration
- ODB Network and ODB Peering
- Comparison of Exadata vs Autonomous Database
If you need maximum performance with AWS proximity, Oracle Database@AWS is one of the most compelling database platforms available today.
Related Articles
- Migrating Oracle Databases to Azure Cloud — Performance Validation and Lessons Learned
- How We Upgraded Oracle 19c to 23ai on Exadata Cloud@OCI — A Complete Real-World Guide
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