An enterprise has applications such as key performance applications, mainstream commercial applications, archiving and printing services, and each application is independent. In order to ensure business priority, SmartMulti-Tenant technology can be used to create tenants for different businesses, and according to tenant levels and business characteristics, set the storage resources of each tenant's vStore.

Engineers can plan subnets of different sizes by changing the length of the subnet mask by ___________ design.

A customer plans to migrate 5TB of object storage data to HUAWEI CLOUD due to business needs. It is recommended to use the pre-migration evaluation function for resource evaluation, and then create object storage near-migration tasks in batches on the evaluation interface. The system will automatically divide it into multiple migration tasks based on the inventory and quantity distribution of objects in the bucket, improving migration efficiency and reducing migration time.

A company's business runs on the Linux system (the kernel is Linux 2.6), and is connected to the storage through ISCSI. The engineer found that the read and write bandwidth of the host accessing the storage is very low, and the application operation is stuck and read and write errors are reported.
Which of the following actions will help resolve the issue in this scenario? (Multiple Choice)

During the processing of Huawei's distributed storage block service IO stack, the block service of the node that writes the request to EDS writes data into the cache, and the read request has a hit in the current index. If it does not hit, it reads and writes from the cache.