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examout.co

When delivering a flash storage project, Huawei engineers introduced the multi-tenant feature of flash storage to the customer. This feature isolates service data. Although different tenants cannot access each other’s LUNs, they can access each other’s file system.

A.

TRUE

B.

FALSE

Cache policies and configurations are involved in storage-layer performance optimization of Huawei flash storage. Which of the following statements is false about the high and low watermarks of a cache?

A.

Generally, the low watermark for storing dirty data in the cache should not be too low. The recommended value is 20%.

B.

Generally, the high watermark of the cache should not be too high, and the difference between the high and low watermarks should not be too small.

C.

If the high watermark of the cache is too high, I/O fluctuation and latency increase will occur usually when the current I/O traffic bursts.

D.

If the high watermark of the cache is too high, the write performance will be affected. If the low watermark of the cache is too low, the read performance will be affected.

In actual service scenarios, the HyperMetro feature of Huawei OceanStor Pacific series supports incremental synchronization. If a site fails, the site that wins arbitration continues providing services, and I/O requests change from the dual-write state to the single-write state. After the faulty site recovers, data generated during the fault can be synchronized to the recovered site.

A.

TRUE

B.

FALSE

To power off a storage system, you need to stop host services, power off controller enclosures, and then disconnect external power supplies.

A.

TRUE

B.

FALSE

An Industry customer has purchased several Huawei flash storage devices for service deployment. An engineer wants to configure the HyperReplication feature on the storage devices. During the configuration, the engineer needs to create an authentication user with the role of "Remote device administrator" on the remote device and then add the remote device.

A.

TRUE

B.

FALSE

When delivering a Huawel OceanStor Pacific scale-out storage project, an engineer introduced the end-to-end data Integrity check technology of scale-out storage to the customer. Which of the following statements are false about this technology?

A.

This technology enables the storage system to implement periodic background data integrity check. When the service load is heavy or service access is frequent, the system automatically starts periodic background data integrity check and self-healing.

B.

For silent data scenarios such as bit change and read offset, the end-to-end data integrity check technology supports logical block addressing (LBA) check of clusters and hosts.

C.

Block, NAS, and object services support end-to-end data integrity check, but the HDF5 service does not.

D.

In this technology, write requests are checked at the system entry (virtual block service). User data is checked again in the object storage device (OSD) before being written to disks. Data Is written to disks only after the data integrity check succeeds.

Huawei OceanStor Pacific series storage systems support the _______ client access mode. This mode allows a single client to connect to multiple storage nodes and supports MPI-I/O access. (Enter an acronym.)

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.

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.

B.

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.

C.

In quorum server mode, the quorum server can be deployed only on physical machines and not on virtual machines.

D.

In quorum server mode, if the link between storage systems is down, each storage system sends an arbitration request to the quorum server.

The service system needs to be backed up before performance optimization b performed on Huawei flash storage, and up to two optimization configurations can be changed at a time.

A.

TRUE

B.

FALSE

When delivering a flash storage project, Huawei engineers Introduced the SmartMuIti-Tenant feature of flash storage to the customer. Which of the following statements are true about SmartMulti Tenant?

A.

A super administrator can force itself, other super administrators, lightweight directory access protocol (LDAP) users, or LDAP user groups to change their passwords upon the next login.

B.

After a system is upgraded to support the SmartMulti-Tenant feature, all LUNs, file systems, and ports in the original system are allocated to the internal system vStore "System_vStore."

C.

To query system role information, the customer can run the "show role system" command.

D.

In flash storage, only a super administrator can modify vStore information, and the internal system vStore "System_vStore" cannot be modified.