When users implement the migration project, which of the following measures can reduce the risk of data inconsistency? (Multiple choice)

• A.Full synchronization with multiple incremental synchronizations, the last synchronization needs to stop the source-side business writing.
• B.Before the migration, the customer should make a backup of the source data.
• C.Stop source-end business writing before migration to ensure that the migrated data is the full amount of data.
• D.After the migration is completed, check whether the destination and source data are consistent.

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When the user uses the HUAWEI CLOUD SMS to migrate the host, the migration task interface shows that it is successfully completed, but the customer does find that the target end is 20G less data than the source end. What are the possible reasons? (Multiple choice)

• A.There may be sparse files in a directory of the host.
• B.Some files may not have permission and cannot be migrated.
• C.Migration file error is reported and skipped by SMS.
• D.There may be some files in the /etc directory that cannot be migrated.

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Compared with virtual machine. Which of the following are the advantages of containers? (Multiple choice)

• A.Fine granularity, high resource utilization
• B.Good isolation
• C.Lightweight, small space occupation
• D.Start in seconds

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In the product architecture of HUAWEI CLOUD Application Operation and Maintenance Management AOM, which of the following data storage can be supported at the storage transport layer? (Multiple choice)

• A.ElasticSearch
• B.ETCD
• C.Redis
• D.MySQL

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Which of the following is not the reason caused MySQL database replication latency standby?

• A.The network delay between the main and standby machines is high.
• B.Continuous large transactions on the main library.
• C.The hardware configuration of the standby machine is poor.
• D.Binlog is not turned on from the library.

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