DAS-C01 · Question #108
A company is migrating from an on-premises Apache Hadoop cluster to an Amazon EMR cluster. The cluster runs only during business hours. Due to a company requirement to avoid intraday cluster…
The correct answer is A. EMR File System (EMRFS) for storage C. AWS Glue Data Catalog as the metastore for Apache Hive E. Multiple master nodes in a single Availability Zone. Three configurations are needed: (A) EMRFS stores data in Amazon S3, so it persists when the cluster is terminated - HDFS (B) is lost when the cluster shuts down. (C) AWS Glue Data Catalog as the external Hive metastore persists independently of the cluster - a MySQL metastore…
Question
A company is migrating from an on-premises Apache Hadoop cluster to an Amazon EMR cluster. The cluster runs only during business hours. Due to a company requirement to avoid intraday cluster failures, the EMR cluster must be highly available. When the cluster is terminated at the end of each business day, the data must persist. Which configurations would enable the EMR cluster to meet these requirements? (Choose three.)
Options
- AEMR File System (EMRFS) for storage
- BHadoop Distributed File System (HDFS) for storage
- CAWS Glue Data Catalog as the metastore for Apache Hive
- DMySQL database on the master node as the metastore for Apache Hive
- EMultiple master nodes in a single Availability Zone
- FMultiple master nodes in multiple Availability Zones
How the community answered
(22 responses)- A77% (17)
- B5% (1)
- D14% (3)
- F5% (1)
Explanation
Three configurations are needed: (A) EMRFS stores data in Amazon S3, so it persists when the cluster is terminated - HDFS (B) is lost when the cluster shuts down. (C) AWS Glue Data Catalog as the external Hive metastore persists independently of the cluster - a MySQL metastore on the master node (D) is destroyed with the cluster. (E) Multiple master nodes in a single Availability Zone provides high availability (EMR supports 3-node master quorum within one AZ) - EMR does not support multiple master nodes spanning multiple Availability Zones (F), making that option invalid.
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