Object Storage Service OBS uses the distributed data fault tolerance technology Erasure code (EC) to ensure high data reliability and data security. The following description of EC technology, what is wrong? Multiple selection
A.
The data will be redundantly shared. and the sharded data will be stored on different servers, and the number of faults is less than the number of redundant, which will not affect the normal operation of the service
B.
Compared with the 3-copy mechanism, the EC algorithm can greatly improve storage utilization
C.
EC is mainly to improve the utilization rate, when the hard disk fails, the data reconstruction speed is similar to the traditional RAID
D.
EC's M+N redundancy mode is the resealing answer to RAID 5 technology
Chosen Answer:
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