Domain 5: Managing Implementation and Ensuring Reliability — GCP PCA Practice Question 35

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Identify the workload types: critical (needs stable VMs) and fault-tolerant (can use Spot VMs). Combine this with GKE cost optimization features like NAP.

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B.Create a separate node pool using Spot VMs for the batch jobs, and enable Node Auto-Provisioning (NAP) to right-size nodes.✓ Correct

Create a separate node pool using Spot VMs for the batch jobs, and enable Node Auto-Provisioning (NAP) to right-size nodes.

GKE allows you to create multiple node pools. By scheduling the fault-tolerant batch jobs onto a node pool backed by Spot VMs (formerly Preemptible VMs), you save massive amounts of money. Keeping the critical web services on standard VMs ensures reliability. Node Auto-Provisioning further optimizes costs by creating nodes that perfectly fit the resource requests of your pods.

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Applying Spot VMs to everything (A). Spot VMs are reclaimed by Google with 30 seconds notice, which will break critical web services.

You manage a GKE cluster that runs a mix of critical web services and fault-tolerant batch processing jobs. The CFO has asked you to drastically reduce the compute costs of the cluster. How should you optimize the cluster architecture?

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Practice the full GCP Professional Cloud Architect Practice Exam 3

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