In the era of big data, traditional technology upgrades can no longer meet the needs of big data processing. Which of the following is not the direction of technology development in the era of big data?

Which of the following statements about backup type selection is false?

A colleague suggests using SmartMigration to improve write performance on certain LUNs.
This is:

Suppose that the initial amount of backup data of an application is 500 GB, one full backup job and six incremental backup jobs are performed weekly, the retention period of all backup data is four weeks, and the redundancy percentage is 20%.
In this scenario, how large back-end storage should be ready for the four-week data?

Operation and maintenance are based on technology and provide higher-quality services through technical guarantee products. Which of the following aspects can be used to improve the quality of operation and maintenance? (Multiple choice)