A company has deployed a high performance computing (HPC) cluster in an Amazon VPC. The cluster runs a tightly coupled workload that generates a large number of shared files that are stored in an Amazon EFS file system. The cluster has grown to over 800 instances and the performance has degraded to a problematic level. A Solutions Architect needs to make some changes to the design to improve the overall performance. Which of the following changes should the Solutions Architect make? (Select THREE.)