Oceanstor collects information through log collection tools and analyzes it through log analysis tools.
Which of the following is correct? (Multiple Choice)

The InfoTier function is configured in Huawei OceanStor 9000. If a file satisfies multiple file pool policies at the same time, the policy for file migration to the highest performance tier has the highest priority.

When configuring the protection level of the Huawei OceanStor 9000 directory, if the data protection level is set to 4+2. Then the corresponding metadata will generate 3 identical images.

The online upgrade method is a highly reliable and highly available upgrade method carried out under the condition that the business is not interrupted, and is used for the occasion where the business cannot be interrupted by the upgrade. Since online upgrades are performed in batches, the impact on business performance is small.

Currently, there are more and more demands for centralized storage of different types of businesses, and different types of businesses have different storage demands.
A company plans to purchase a set of OceanStor V3 storage, equipped with 10 600GB SSD disks, 20 1.2T SAS disks, and 40 4TB SATA disks, and plans to deploy Oracle database, Exchange mail application and video application on this storage device at the same time. Which of the following configurations can improve overall business performance? (Multiple Choice)