A.create /node

B.set/node data

C.get/node

D.1s/node

A.Data storage and retrieval are performed according to the scheduling of the client or the name node

B.Responsible for storing and reading data

C.Periodically send the namenode a list of its own stored blocks.

D.Records all operations for file creation, deletion, renaming, etC.

A.The number of Partitions determines the maximum number of concurrent consumers in each consumer group

B.Each Partition is an ordered and immutable message queue

C.The Partition mechanism is introduced to ensure the high throughput of Kafka

D.Each Partition corresponds to a log file at the storage level

A.Mass data application scenarios

B.High throughput application scenarios

C.Semi-structured data application scenarios

D.Large file application scenarios

A.Flume supports multi-cascade and multiplexing

B.Data transmission between Flume cascade nodes does not support compression

C.Data transmission between Flume cascade nodes supports encryption

D.There is a need for encryption in processes such as Source to Channel to Sink