Migrate to Oracle Autonomous Database on Dedicated Exadata Infrastructure
This section describes how to migrate your Oracle Exadata workloads to Oracle Autonomous Database on Dedicated Exadata Infrastructure, and migrate your VMware applications to Oracle Cloud VMware Solution.
Architecture
This architecture shows a migration from on-premises Oracle Exadata databases and VMware applications to Oracle Autonomous Database on Dedicated Exadata Infrastructure and Oracle Cloud VMware Solution.
Using Oracle Zero Downtime Migration, automate your database migration while experiencing minimal downtime when migrating your data from on-premises to the cloud.
Migrate your on-premises applications running on VMware to Oracle Cloud VMware Solution using VMware tools such as HCX and vMotion. Oracle Cloud VMware Solution gives you a fully automated implementation of a VMware software-defined data center (SDDC) within your OCI tenancy, running on OCI bare metal instances.
The following diagram illustrates this reference architecture.
migrate-vmware-cloud-solution-autonomous-dedicated-architecture.zip
This architecture supports the following components:
- Region
An Oracle Cloud Infrastructure region is a localized geographic area that contains one or more data centers, called availability domains. Regions are independent of other regions, and vast distances can separate them (across countries or even continents).
- Virtual cloud network (VCN) and subnet
A VCN is a customizable, software-defined network that you set up in an Oracle Cloud Infrastructure region. Like traditional data center networks, VCNs give you complete control over your network environment. A VCN can have multiple non-overlapping CIDR blocks that you can change after you create the VCN. You can segment a VCN into subnets, which can be scoped to a region or to an availability domain. Each subnet consists of a contiguous range of addresses that don't overlap with the other subnets in the VCN. You can change the size of a subnet after creation. A subnet can be public or private.
- Oracle Autonomous Database on Dedicated Exadata Infrastructure
Oracle Autonomous Database on Dedicated Exadata Infrastructure provides access to the latest autonomous database technology running on a dedicated Exadata Infrastructure in an OCI region. With Autonomous Database you have a fully elastic database where Oracle autonomously operates all aspects of the database lifecycle from database placement to backup and updates. A dedicated Exadata Infrastructure can host many autonomous VM clusters, which can host many autonomous databases.
- Oracle Cloud VMware Solution Software-Defined Data Center (SDDC)
Oracle and VMware have partnered to develop a VMware certified Software-Defined Data Center (SDDC) implementation for use within Oracle Cloud Infrastructure. This implementation, called the Oracle Cloud VMware Solution, uses Oracle Cloud Infrastructure to host a highly available VMware SDDC. It also allows seamless migration of all your on-premises VMware SDDC workloads to Oracle Cloud VMware Solution. Oracle Cloud VMware Solution contains the following VMware components:
- VMware vSphere ESXi
- VMware vSAN
- VMware vCenter
- VMware NSX-T
- VMware HCX (optional)
- Bare metal
An Oracle Cloud VMware Solution Software-Defined Data Center (SDDC) contains bare metal servers hosting Oracle Cloud VMware Solution. The bare metal server supports applications that require high core counts, large amounts of memory, and high bandwidth (such as Oracle Cloud VMware Solution). You can deploy Oracle Cloud VMware Solution on bare metal servers, and configure virtual machines with significant performance improvements compared to other public clouds and on-premises data centers.
- Service gateway
The service gateway provides access from a VCN to other services, such as Oracle Cloud Infrastructure Object Storage. The traffic from the VCN to the Oracle service travels over the Oracle network fabric and never traverses the internet.
- Dynamic routing gateway (DRG)
The DRG is a virtual router that provides a path for private network traffic between VCNs in the same region, between a VCN and a network outside the region, such as a VCN in another Oracle Cloud Infrastructure region, an on-premises network, or a network in another cloud provider.
- FastConnect
Oracle Cloud Infrastructure FastConnect provides an easy way to create a dedicated, private connection between your data center and Oracle Cloud Infrastructure. FastConnect provides higher-bandwidth options and a more reliable networking experience when compared with internet-based connections.
- File storage
OCI File Storage is used as temporary storage space when migrating databases from on-premises Oracle Exadata to Oracle Autonomous Database on Dedicated Exadata Infrastructure.
- Object storage
OCI Object Storage is used for temporary storage of database backups and exports during migration.
Before You Begin
Before you begin, check the versions of major components used in this setup, and review the product documentation for later reference.
Review Requirements
- Ensure the source database is running Oracle Database version 19.18 Enterprise Edition or above.
- The target database must be Oracle Autonomous Database on Dedicated Exadata Infrastructure version 19.19.0.1.0 Enterprise Edition Extreme Performance or above.
- Oracle Zero Downtime Migration must be version 21.4 or above.
- Intermediate storage must include OCI Object Storage, and Oracle ZFS Storage Appliance (NAS).
Review Documentation
This solution playbook describes how to migrate your database workloads. Refer to the solution below to learn how to migrate your VMware workloads. The additional resources are helpful for context, details, and reference for your database migration.
Learn how to migrate the VMware components of your workload to Oracle Cloud VMware Solution.
Review Oracle Zero Downtime Migration resources:
- Oracle Zero Downtime Migration
- Oracle Zero Downtime Migration Video
- Install Oracle Zero Downtime Migration software
Review logical migration resources:
- "Setting Logical Migration Parameters" in Move to Oracle Cloud Using Zero Downtime Migration Guide
- Step-by-Step Guide - Logical Online Migration from On-Premises to Oracle Autonomous Database
Review Oracle Database resources:
About Required Products and Roles
This solution requires the following products:
- Oracle Cloud Infrastructure Identity and Access Management
- OCI Compute
- OCI Object Storage
- Oracle Zero Downtime Migration
- Oracle Exadata
- Oracle Autonomous Database on Dedicated Exadata Infrastructure
These are the roles needed for each product.
Product Name: Role | Required to... |
---|---|
Oracle Cloud Infrastructure Identity
and Access Management: OCI_user |
Create API keys for logical migration |
OCI Compute: admin |
Create OCI Compute instance to run Oracle Zero Downtime Migration software |
OCI Object Storage: Storage Admin |
Create OCI Object Storage buckets to upload exported data |
Oracle Zero Downtime Migration: opc |
Create zdmuser to install and run Oracle Zero Downtime Migration software
|
Oracle Zero Downtime Migration: zdmuser |
|
Oracle Exadata: root/sudoer user |
|
Oracle Exadata Database: sys/system |
Run Data Pump to export database for logical migration |
Oracle Autonomous Database on Dedicated Exadata Infrastructure: Database Admin |
Create target Oracle Autonomous Database on Dedicated Exadata Infrastructure database |
Oracle Autonomous Database on Dedicated Exadata Infrastructure: ADMIN |
Run Data Pump to import database for logical migration |
See Oracle Products, Solutions, and Services to get what you need.
Considerations for Migration
Before you begin your migration, review these assumptions and considerations.
- Logical migration is the only supported method to migrate databases from Oracle Exadata to Oracle Autonomous Database on Dedicated Exadata Infrastructure.
- The following steps in this playbook describe how to migrate using an offline logical migration, see the Review Documentation section for information on how to migrate using an online logical migration. During logical online migration, Oracle Zero Downtime Migration configures Oracle GoldenGate for migrations between the source and target databases to ensure the databases are always online during migration.
- During logical migration, pluggable databases (PDBs) and/or schemas are migrated. Non container databases are migrated to an Oracle Autonomous Database on Dedicated Exadata Infrastructure database contained in an Autonomous Container Database.
- During logical migration, Oracle Zero Downtime Migration will not export the data directly to OCI Object Storage. On the source Exadata database, Oracle Zero Downtime Migration exports data to a shared file system (either network file system or Oracle Advanced Cluster File System). Exported data is then uploaded to OCI Object Storage. The target Oracle Autonomous Database on Dedicated Exadata Infrastructure database imports data from OCI Object Storage.
- Oracle Exadata on-premises can run both single-instance and RAC databases. Oracle Autonomous Database on Dedicated Exadata Infrastructure runs RAC databases. During database migration, Oracle Zero Downtime Migration converts single-instance to RAC databases when required.
- In on-premises Oracle Exadata, the use of Oracle Transparent Data Encryption to encrypt databases is optional. When migrating databases from Exadata to Oracle Autonomous Database on Dedicated Exadata Infrastructure, the target Oracle Autonomous Database on Dedicated Exadata Infrastructure database will always be encrypted.
- The source Exadata and target Oracle Autonomous Database on Dedicated Exadata Infrastructure databases must run the same timezone files.
- The steps in this playbook assume there is direct network connectivity between the Data Center where Exadata is installed, and the OCI Virtual Cloud Network where the Oracle Autonomous Database on Dedicated Exadata Infrastructure and the Oracle Zero Downtime Migration virtual machine is configured (via FastConnect or IPSec VPN as shown in the architecture diagram).
- By default, the Oracle Zero Downtime Migration will try to communicate with the Oracle Autonomous Database on Dedicated Exadata Infrastructure database using the
high_tls
service. Ensure connectivity for TCPS on port 2484 is allowed between the Oracle Zero Downtime Migration virtual machine and the Oracle Autonomous Database on Dedicated Exadata Infrastructure database.