QUESTION 41
The performance of a storage system can be measured by multiple indicators. In application scenarios where the I/O size is greater than or equal to 64 KB, the indicator is the main concern for storage performance.
Correct Answer: bandwidth
QUESTION 42
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?
A. Cache hit ratio of hot metadata
B. Hit ratio of the prefetch algorithm
C. CPU usage of metadata background management
D. Whether failover is enabled for protocol receiving threads
Correct Answer: AC
QUESTION 43
Assume a financial customer purchased several Huawei flash storage devices for service deployment. During the use of the storage devices, an engineer found that the overall latency is high and the system response is slow. Which of the following measures can the engineer take to troubleshoot this issue?
A. Check whether the hit ratio changes abruptly on the storage side.
B. Check whether special operations are performed or unexpected services are triggered on the host when the issue occurs.
C. Use FTDS, the latency locating tool on the storage side, to analyze the modules with abnormal latency.
D. Replace the memory and CPUs.
Correct Answer: ABCD
QUESTION 44
Assume a financial customer purchased several Huawei OceanStor Pacific scale-out storage devices for service deployment, and an engineer has configured the file service in the Distributed Parallel Client (DPC) on the storage devices. To meet service requirements, the engineer needs to enable the CPU performance mode for the DPC node. Which of the following commands cannot be used to enable the performance mode?
A. set cpu frequency -g performance
B. /opt/fusionstorage/dpc/script/ dpcctl set_param numa_optimize false
C. cpupower frequency-info
D. cpupower frequency-set -g performance
Correct Answer: BC
QUESTION 45
OLTP is a major application in a traditional relational database and mainly used to process basic and routine transactions. Which of the following statements is false about OLTP?
A. In the OLTP service, the back-end port bandwidth does not need to be monitored.
B. From the database perspective, reading, writing, and changing of each transaction involve a small amount of data, and access requests from many users are processed simultaneously.
C. From the storage perspective, data is usually read in sequence, and data of write operations is stored in the temporary tablespace when read operations are being performed.
D. In the OLTP service, special attention is usually required for the average I/O response time and average CPU usage of controllers.
Correct Answer: C
QUESTION 46
The OLAP database service scenario differs from the OLTP database service scenario. The OLAP database service scenario mainly involves random small I/Os with more read operations than write operations, while the OLTP database service scenario mainly involves sequential read of large I/Os.
A. TRUE
B. FALSE
Correct Answer: B
QUESTION 47
Assume a bank customer purchased several Huawei flash storage devices for deploying the document imaging service. This service mainly involves random large I/Os, more read operations than write operations, and many metadata operations, with obvious hot and cold data characteristics.
A. TRUE
B. FALSE
Correct Answer: B
QUESTION 48
The service system needs to be backed up before performance optimization is performed on Huawei flash storage, and up to two optimization configurations can be changed at a time.
A. TRUE
B. FALSE
Correct Answer: A
QUESTION 49
A financial customer purchases several Huawei flash storage devices for service deployment. During routine storage management, if an engineer logs in to a storage device as a data protection administrator, which of the following operations can the engineer perform?
A. Managing security policies and security rules
B. Managing the antivirus function
C. Managing HyperCDP objects and snapshot consistency groups
D. Managing clone consistency groups and LUN consistency groups
Correct Answer: CD
QUESTION 50
A government customer purchases a Huawei OceanStor Dorado storage device for service deployment. During routine maintenance, an engineer finds that the health status of the storage pool is degraded.
Which of the following statements is true?
A. The health status is the same as the running status. Therefore, the storage device stops running and cannot provide space.
B. If the health status of the storage pool is degraded, it can work properly but cannot achieve the optimal performance.
C. If the health status of the storage pool is degraded, it cannot work properly.
D. LUNs created from the storage pool are in the write-protected state. That is, services can only read data from the LUNs.
Correct Answer: B
QUESTION 51
A financial customer purchases a Huawei flash storage device for subsequent service deployment. During storage configuration, an administrator finds that LUNs mapped to an application server cannot be detected on the application server. Which of the following are possible causes of this exception?
A. In UNIX or Linux, a device node file is lost.
B. The storage pool is faulty.
C. In HP-UX, the application server does not have a LUN mapping whose host LUN ID is 0.
D. The serial port connection parameters are incorrectly set.
Correct Answer: ABC
QUESTION 52
All components of Huawei OceanStor Dorado 18000 are . Maintenance engineers can use the replacement tool in SmartKit to replace the components by following the wizard.
Correct Answer: FRU
QUESTION 53
An industry customer purchases several Huawei flash storage devices for service deployment. During routine management, an engineer finds that a controller of one device is faulty, but the fault is common, so the engineer does not need to perform emergency handling.
A. TRUE
B. FALSE
Correct Answer: B
QUESTION 54
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
Correct Answer: B
QUESTION 55
During routine O&M, if an engineer finds that the system disk and some interface modules of a flash storage device are faulty, the engineer can directly remove and replace the faulty parts.
A. TRUE
B. FALSE
Correct Answer: B
QUESTION 56
A government customer purchases several Huawei flash storage devices to store upper-layer service data. After the storage devices are deployed, which of the following commands can the administrator run on the command-line interface (CLI) to query the configuration of the NTP time synchronization function?
A. show license_active
B. show system ntp
C. show ntp_server general
D. change ntp_ server config
Correct Answer: B
QUESTION 57
In service scenarios, eSight can be installed on physical machines or VMs, and alarms can be uploaded to the DME IQ cloud system only by email.
A. TRUE
B. FALSE
Correct Answer: B
QUESTION 58
An industry customer purchases a Huawei OceanStor Dorado 6000 storage device for service deployment. During service running, the services are interrupted suddenly. An engineer runs the “show storage pool general” command and finds that the storage pool is faulty. The possible cause is that the number of faulty disks exceeds the maximum number supported by the policy.
Correct Answer: RAID
QUESTION 59
There are multiple system roles in a storage system. Which of the following roles has full control permissions over the storage device?
A. Super administrator
B. Network administrator
C. Read-only user
D. Data protection administrator
Correct Answer: A
QUESTION 60
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
Correct Answer: A