Which of the following is not a key feature of HUAWEI CLOUD distributed messaging DMS service?

Which of the following is not a key feature of HUAWEI CLOUD distributed messaging DMS service?
A . Provide hotspot data caching
B . Flexible queue type: Provide ordinary queue, FIFO queue, Kafka queue
C . Supports rich message capabilities such as message filtering, message backtracking, message reposting, and broadcast messages
D . Accumulation of tens of billions of messages

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Answer: A