Databricks Certified Data Engineer - Associate
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A data engineer has a Job with multiple tasks that runs nightly. Each of the tasks runs slowly because the clusters take a long time to start. Which of the following actions can the data engineer perform to improve the startup time for the clusters used for the Job?
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A
They can use endpoints available in Databricks SQL
B
They can use job clusters instead of all-purpose clusters
C
They can configure the clusters to be single-node
D
They can use clusters that are from a cluster pool
E
They can configure the clusters to autoscale for larger data sizes
Explanation:
Explanation
Correct Answers: B and D
Why B is correct:
- Job clusters are specifically designed for running production jobs and are optimized for faster startup times compared to all-purpose clusters
- All-purpose clusters are intended for interactive development and may have longer startup times due to additional configuration and setup
- Job clusters can be configured with appropriate instance types and settings optimized for the specific job requirements
Why D is correct:
- Cluster pools maintain a pool of pre-warmed, ready-to-use clusters
- When a job needs a cluster, it can be assigned from the pool immediately without waiting for cluster startup
- This significantly reduces startup time as the clusters are already running and warmed up
Why other options are incorrect:
A: Databricks SQL endpoints are for SQL analytics workloads, not for improving cluster startup time for general jobs
C: While single-node clusters may start slightly faster than multi-node clusters, this is not the most effective solution and may not meet the computational requirements of the job
E: Autoscaling helps with handling varying data sizes during job execution but does not address cluster startup time
Best Practices:
- Use job clusters for production workloads
- Configure cluster pools for frequently used instance types
- Consider using spot instances in pools for cost optimization
- Monitor cluster startup metrics to identify bottlenecks
- Use appropriate instance types that balance startup time and performance
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