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RAN-DBDEA-00169
Ranvier · DBDEA

Exam DBDEA Topics: troubleshooting Difficulty: medium

A Lakeflow Job runs on an autoscaling job cluster configured with minimum 2 workers and maximum 8. At the start of a large backfill, thousands of tasks are queued, but the cluster runs with only 2 workers for several minutes before more nodes join. The engineer expected 8 workers immediately. What explains the behavior?

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  1. A. Autoscaling always jumps straight to the configured maximum worker count as soon as the job run starts
  2. B. Autoscaling adds nodes gradually as task queues and utilization justify them; the minimum is only a guaranteed baseline
  3. C. The maximum workers setting is ignored on job clusters, so this cluster can never exceed two nodes
  4. D. Autoscaling does nothing by itself: an engineer must call the Clusters API and attach nodes manually as the backlog grows
Reveal answer

Correct answer: Autoscaling adds nodes gradually as task queues and utilization justify them; the minimum is only a guaranteed baseline

Reference: https://docs.databricks.com/aws/en/compute/configure

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Official Answer (B): Autoscaling adds nodes gradually as task queues and utilization justify them; the minimum is only a guaranteed baseline

⚓ Official Documentation Anchor: https://docs.databricks.com/aws/en/compute/configure
Ranvier · DBDEA

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