A company uses the RDS for mysql service of HUAWEI CLOUD. As the amount of data increases, the disk of the RDS instance is found to be full. Which of the following methods can be used to solve it? (Multiple choice)

Which of the following components is suitable for storing structured column-oriented large table data?

A company's e-commerce website is built on an ECS instance of HUAWEI CLOUD, and HUAWEI CLOUD CDN is used for website acceleration. However, it was discovered that cross-domain access failed after CDN acceleration.
Which of the following ways can tenants use to solve the problem?

If the user needs to pass the three-level certification, the final evaluation score must be greater than or equal to which of the following scores?

A company uses ECS services on Huawei Cloud. In order to ensure high service availability and achieve the effect of switching to other availability zones as soon as an availability zone fails, which of the following Huawei Cloud services is recommended for tenants?