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Deep dive into Amazon EKS scalability testing

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This article discusses how Amazon EKS approaches scalability testing and ensuring the scalability of EKS clusters. It covers the Service Level Indicators (SLIs) and Service Level Objectives (SLOs) defined by the Kubernetes community for measuring the performance of Kubernetes components.

Specifically, the article covers:

  • Kubernetes upstream SLOs for API request latency (mutating and read-only) and Pod startup latency
  • Kubernetes SLI metrics and how to use them to investigate performance
  • How Amazon EKS runs scalability tests using ClusterLoader2 on a 5,000 node cluster
  • AWS service quotas and considerations for running large-scale tests
  • Results of Amazon EKS scalability testing and the maximum resource counts achieved
  • How to analyze SLOs and performance on your own EKS clusters
  • Amazon EKS contributions to the Kubernetes community for scalability testing


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