# How Amazon Parallel Computing Service uses Amazon Secrets Manager
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Amazon Parallel Computing Service (Amazon PCS) is a managed service that makes it easier to run and scale high performance computing (HPC) and distributed machine learning workloads on Amazon.

To connect to the cluster job scheduler, Amazon PCS creates a [managed secret](service-linked-secrets.md) with the prefix `pcs` to store the scheduler key. The cost of storing the secret is included with the charge for Amazon PCS. Amazon PCS automatically deletes the secret when you delete your Amazon PCS cluster. For more information, see [Working with cluster secrets in Amazon PCS](https://docs.amazonaws.cn/pcs/latest/userguide/working-with_clusters_secrets.html) in the *Amazon PCS User Guide*.

**Important**  
Don't modify or delete Amazon PCS cluster secrets.