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Optimizing EC2 Instance Placement: A Deep Dive into Cluster, Spread, and Partition Placement Groups
When deploying applications in AWS, it’s important to consider how your EC2 instances are placed on physical hardware to meet specific requirements like low-latency performance, fault tolerance, or scalability. AWS offers EC2 Placement Groups as a way to influence how your instances are placed within the AWS infrastructure. By selecting the right placement strategy, you can optimize your workload for better network performance, reduced failure risk, or improved scalability. In this article, we’ll explore the three types of placement groups — Cluster, Spread, and Partition — and discuss their pros, cons, and use cases.
1. Cluster Placement Group
A Cluster Placement Group clusters EC2 instances within a single Availability Zone (AZ) on the same physical hardware to achieve low-latency, high-throughput network performance. Instances within a cluster placement group benefit from extremely fast communication because they are placed physically close to each other, making this strategy ideal for high-performance computing (HPC).
Key Features:
- Low latency: Instances have a high-speed 10 Gbps network connection (with Enhanced Networking enabled).
