AWS ParallelCluster 3.4 is now generally available and introduces the ability to create HPC clusters that can access and aggregate compute capacity across multiple AWS Availability Zones (AZ) in a Region. Other important features in this release include:
Amazon VPC configuration for AWS Lambda functions used by ParallelCluster for managing your clusters.
Custom AWS IAM prefixes for ParallelCluster IAM roles and policies to enable permission boundaries.
Secure file-system mounting for Amazon EFS to enable in-transit encryption and IAM authorizations.
Ability to set up custom actions for cluster updates.
Source:: Amazon AWS