In the Hadoop system, if the backup factor of the HDFS file system is 3, then each time MapReduce runs the Task, it must transfer the file segments to be processed from 3 machines with copies.

Assume that HDFS only saves 2 copies when writing data. Then during the writing process, HDFS Client first writes data to DataNode1 and then writes data to DataNode2.

When a MapReduce task fails, the task can be recalculated through the retry mechanism.

Which of the following descriptions about the key features of Flink is wrong?

Hadoop's HDFS is a distributed file system, which of the following application scenarios is suitable for data storage and management? (Multiple choice)