Distributed-processing nodes exchange large amounts of data within one Availability Zone.
Reduce inter-node latency while preserving high network throughput.
Which EC2 placement is most appropriate?
Place the instances in a cluster placement group for close physical placement within one Availability Zone.
Detailed explanation
Spread placement distributes instances across failure domains rather than placing them close together.
Spread placement distributes instances across failure domains rather than placing them close together.
Inter-Region distance and network paths are inconsistent with low-latency communication.
Inter-Region distance and network paths are inconsistent with low-latency communication.
An instance type alone does not provide the physical placement requirement.
An instance type alone does not provide the physical placement requirement.
A cluster placement group places instances close together in one Availability Zone for low latency and high throughput.
A cluster placement group places instances close together in one Availability Zone for low latency and high throughput.
Check official documentation
Compare the following points with the official documentation.
Amazon EC2 placement groups cluster spread partitionの公式説明を確認する。
What to confirm
ClusterとSpread placement groupの目的を性能と障害分散の観点で比較できる。
Key points
- Cluster placement group
- Spread placement group
- Low latency
Notes
- Environment: AWS公式SOA-C03試験ガイドとAWS公式ドキュメントの確認
- Confirm current behavior in the official SOA-C03 guide and AWS service documentation.
Foundation review
Placement trade-off
Close placement favors communication performance, while spread placement favors hardware separation.
Availability Zone
A placement group is scoped to an Availability Zone and does not remove regional failure risk.