Amazon FSx for OpenZFS Supports Multi-AZ File Systems in Shared VPCs

Amazon FSx for OpenZFS now supports the creation of Multi-AZ file systems within shared VPCs across an AWS Organization. This enhancement allows storage administrators to deploy highly available file systems into subnets owned and managed by a central networking account. By utilizing VPC sharing, organizations can effectively separate the responsibilities of network administration from storage management. Network teams can maintain strict control over IP address spaces and routing policies, while application teams can provision the storage resources they need without requiring direct access to the underlying VPC configuration. This update is particularly beneficial for enterprise environments that rely on centralized networking hubs and require Multi-AZ reliability for mission-critical workloads. The feature simplifies the deployment process for cross-account architectures and eliminates the need for complex VPC peering or transit gateway configurations for storage access. Users can start deploying Multi-AZ file systems in shared subnets via the AWS Management Console, Command Line Interface, or SDKs. It is important to ensure that the shared subnets are correctly configured across multiple Availability Zones to meet the prerequisites for FSx for OpenZFS Multi-AZ deployments.
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| Aspect | Before / Alternative | After / This |
|---|---|---|
| VPC Requirement | File system must be in a VPC owned by the same account | File system can be in a subnet shared by another account |
| Admin Model | Storage admins often needed VPC-level permissions | Network and storage admin roles are strictly decoupled |
| Architecture | Relied on VPC peering for cross-account storage access | Native support for shared subnets via AWS RAM |
Source: AWS What's New
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