Which of the following options is a process that MapReduce must have? (Multiple choice)

In the operation process of Flink, which role is responsible for applying for resources?

Under the HDFS federation mechanism, metadata between NameNodes is not shared.

On the FusionInsight Manager interface, when a Kafka disk capacity shortage alarm is received, and the cause of the read alarm has been eliminated from the disk hardware failure, the system administrator needs to consider capacity expansion to solve this problem.

In Fusioninsight HD, which of the following is not part of the flow control feature of Hive? (Multiple choice)