What is the role of a local job runner in Hadoop unit testing?
- Execute Jobs on Hadoop Cluster
- Manage Distributed Data Storage
- Simulate Hadoop Environment Locally
- Validate Input Data
A local job runner in Hadoop unit testing simulates the Hadoop environment locally. It allows developers to test their MapReduce jobs on a single machine before deploying them on a Hadoop cluster, facilitating faster development cycles and easier debugging.
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