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aws / aws-parallelcluster

AWS ParallelCluster is an AWS supported Open Source cluster management tool to deploy and manage HPC clusters in the AWS cloud.
https://github.com/aws/aws-parallelcluster
Apache License 2.0
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Possible performance degradation on ParallelCluster 2.11.0 with Amazon Linux 2 and ParallelCluster >=2.6.0 with custom Amazon Linux 2 AMIs #2920

Closed tilne closed 3 years ago

tilne commented 3 years ago

Affected versions: 2.11.0 and >= 2.6.0 if using an AMI created with the pcluster createami command after May 29th 2021. Affected OS: Amazon Linux 2

The performance of tightly coupled / MPI workloads on clusters with Amazon Linux 2 operating system may be impacted by enabling CloudWatch logging.

Our preliminary analysis has found this is likely related to the CloudWatch Agent version 1.247348.0b251302, you can check which version you have installed by running the command: yum list amazon-cloudwatch-agent

You can find the mitigations to avoid performance degradation at here.

tilne commented 3 years ago

This issue was fixed by the 2.11.1 release.