Home > Storage > PowerFlex > White Papers > Dell APEX Block Storage for AWS: Backup and Recovery using DDVE and DD Boost Oracle RMAN Agent > Logical architecture
The following figure shows a logical view of a two-layer Dell APEX Block storage for AWS with DDVE using the Oracle RMAN agent configuration in AWS:
Figure 17. DDVE with PowerFlex using Oracle RMAN agent
The two-layer configuration is deployed in a region with three AZs. AWS recommended best practices were followed for secure access to the DDVE and Dell APEX Block storage for AWS on the VPC architecture. The PowerFlex SDS is installed using the Amazon EC2 i3en.12xlarge instance type running on each AZ in a private subnet with the Red Hat Enterprise Linux 8.4 AMI. PowerFlex maintains the user data in a RAID 1 mesh mirrored layout. Two copies (primary and secondary) of data are stored on two different Amazon EC2 instances (SDSs). The copies are evenly distributed across the storage devices. This configuration enables the system to maintain data availability following the failure of storage media or Amazon EC2 instances.
The PowerFlex SDC is installed in the Amazon EC2 c5n.9xlarge instance type running on one of the AZs (AZ-1). The Oracle 19c Grid infrastructure and Oracle 19c database software for a stand-alone server is installed on the Amazon EC2 c5n.9xlarge instance. The PowerFlex volumes required for the Oracle 19c database are created from the PowerFlex storage pool and are mapped to the Amazon EC2 instance where the PowerFlex SDC service is running. Create ASM disk groups from PowerFlex volumes and ensure that the Oracle 19c stand-alone database uses PowerFlex SDS storage for Oracle database workloads.
By using the AWS CloudFormation template for DDVE available from AWS Marketplace, two DDVE m5.xlarge instances are instantiated and attached with Amazon EBS as meta data disks. The DDVEs are placed in multiple AZs in an AWS region to provide redundancy using DD replication capabilities at the AWS regional level.
The Oracle RMAN agent is installed on database servers. It enables database servers to communicate with the DD system and stores Oracle backups in an Amazon S3 bucket.