Huawei H13-624_V5.5 Value Pack (Frequently Bought Together)

When delivering a flash storage project, Huawei engineers introduced the arbitration mechanism of HyperMetro to the customer. Which of the following statements is false about the arbitration modes?

• A. In quorum server mode, of the link between storage systems is down, each storage system sends an arbitration request to the quorum server.
• B. In quorum server mode, the quorum server can be deployed only on physical machines and not on virtual machines.
• C. If no quorum server is configured, HyperMetro works in static priority mode. When an arbitration occurs, the preferred site wins the arbitration and provides services.
• D. In static priority mode, if the preferred site of a HyperMetro pair breaks down, the non-preferred site does not automatically take over HyperMetro services. As a result, the services stop, and the customer must forcibly start the services at the non-preferred site.

Assume a financial customer purchased multiple Huawei flash storage devices for routine service deployment. Which of the following statements is false about service system characteristics in financial scenarios?

• A. The database OLTP service mainly involves random small I/Os and a few sequential write I/Os.
  There are more read operations than write operations, and hot data areas are clear.
• B. Backup and archiving services mainly involve sequential large I/Os. Writes are involved in backup and archiving services, and reads are involved in restoration services.
• C. Document imaging services mainly involve sequential read of large I/Os, a few metadata operations, and 90% GB-level large file write operations.
• D. The database OLAP service involves sequential read of large I/Os. The amount of data processed per batch determines hot data areas.

To power on Huawei OceanStor Dorado 6000 storage, a customer must hold down the power button for more than 5 seconds.

• A. TRUE
• B. FALSE

A new engineer is learning about Huawei's distributed storage products and does not understand DPC file services. Please help him determine which of the following descriptions of DPC are wrong? (Multiple choice)

• A. DPC itself and NUMA are mutually exclusive, so in actual scenarios, it is impossible to provide NUMA affinity optimization features.
• B. When the business running on the DPC requires higher performance, engineers can set the CPU to performance mode.
• C. If engineers want to deploy DPC resource reservation, the remaining memory of the computing node must not be less than 8G, of which the operating system reserves no less than 4G.
• D. If the engineer wants to enable CPU performance mode, he can use the cpupowerfrequency-set - g performance command to buy cash

In Huawei flash storage, the integrated I/O stack of SAN and NAS can be divided into the storage pool layer, space management layer, and data service layer. Which of the following are performance concerns of the space management layer? (Choose all that apply.)

• A. Hit ratio of the prefetch algorithm
• B. Cache hit ratio of hot metadata
• C. Whether failover is enabled for protocol receiving threads
• D. CPU usage of metadata background management