H13-622 : Huawei Certified Network Professional- Constructing Big Data Solution​ : Part 03

H13-622 : Huawei Certified Network Professional- Constructing Big Data Solution​ : Part 03

1. Which of the following statements about the application scenarios of different nodes of the HUAWEI OceanStor 9000 big data storage systems is correct?

   • The mini-capacity node applies to small-capacity scenarios.
   • The performance node applies to large-capacity and high-bandwidth scenarios.
   • The capacity node applies to OPS-intensive scenarios.
   • None of the above is correct.

2. If an engine node of an N8500 storage system cannot be started, which of the following measures is incorrect?

   • Replace the CPUs.
   • Replace the memory.
   • Replace the Fibre Channel interface cards.
   • Replace the main board.

3. Compared with a relational database, which of the following are advantages of NoSQL? (Select three)

   • Flexible scalability
   • High availability
   • High cost-effectiveness
   • Feature richness

4. The fencing function provided by an N8500 prevents split-brain from occurring. Which of the following statements about fencing are correct? (Select three)

   • Monitors GAB and checks the changes of cluster members.
   • Ensures the single view of cluster members.
   • Prevents multiple nodes from using a volume manger to access the shared storage.
   • Automatically recovers the master node if the cluster becomes abnormal.

5. Which of the following statements about different service applications’ storage performance and capacity requirements are correct?

   • Compared with an email application, an enterprise OLTP/OLAP database requires higher storage performance.
   • Compared with picture and video applications, a large-sized relational database requires a larger storage capacity.
   • Compared with the content delivery network application, the backup and archive services require higher storage performance.
   • Compared with a real-time online service system, scientific computing requires higher storage performance.

6. Which of the following must be considered before you optimize the performance of an N8500 clustered NAS storage system? (Select three)

   • Evaluate the feasibility of the performance target based on your experience.
   • Use a fixed testing environment for performance optimization.
   • Determine the testing mode based on services to ensure the comparability of the test results.
   • Performance optimization has no impact on ongoing services. You do not need to worry about the pressure on services.

7. A NAS storage system supports file system sharing, and the underlying protocol transmits data based on iSCSI.

   • True
   • False

8. Which of the following statements about the file system mirroring feature provided by an N8500 clustered NAS system are incorrect? (Select two)

   • The N8500 supports a maximum of two mirrors for a single file system.
   • Resources of different storage pools can be selected to implement file system mirroring.
   • File system mirroring allows users to select three mirroring layout types.
   • In the same service scenario, mirrored-stripe and striped-mirror provide the same data reliability and performance.

9. An OceanStor 9000 storage system uses GE for the front-end network and 10GE for the back- end network. Which of the following statements is incorrect about the ports on the P node as shown in the figure?

   

   • Ports AO-1 and AO-1 are connected to the 10GE switch. A back-end network IP address must be planned for each of the two ports.
   • Ports B3-0 and B3-1 are connected to the front-end service switch. A front-end network IP address must be planned for each of the two ports.
   • NIC 0 is connected to the management and maintenance switch. You do not need to assign an IP address for this port.
   • Port IPMI is connected to the management and maintenance switch. You do not need to assign an IP address for this port.

10. In performance optimization of the N8500 clustered NAS storage systems, the top command is runand the following output is displayed:

    top – 01: 06: 48 up 1: 22, 1 user, load average: 0.06, 0.60, 0.48 Tasks: 29 total, 1 running, 28 sleeping, 0 stopped, 0 zombie Cpu(s): 0.3% us, 1.0% sy, 0.0% ni, 98.7% id, 0.0% wa, 0.0% hi, 0.0% si Mem: 191272k total, 173656k used, 17616k free, 22052k buffers Swap: 192772k total, 0k used, 192772k free, 123988k cached

    Which of the following statements is incorrect?

    • up 1:22 indicates the current system time.
    • load average indicates the average length of task queues.
    • 0.3% us in Cpu(s) indicates the CPU occupation percentage of user space.
    • 17616k free in Mem indicates the total capacity of free memory.

11. Which of the following statements about the file system used by the OceanStor 9000 is incorrect?

    • The file system provides a unified file system namespace.
    • The name of the namespace provided by the file system is the same as the system name.
    • The root directory of the namespace does not provide sharing or access.
    • Added capacity can be directly obtained from the storage pool.

12. Which of the following are included in Hadoop? (Select three)

    • HDFS
    • HBase
    • MapReduce
    • MPP DB

13. Compared with traditional RAID algorithms, the erasure code redundancy technology used by Huawei OceanStor 9000 provides higher reliability and more flexible redundancy policies. Which of the following statements about the erasure code is incorrect?

    • Data to be written is divided into N data blocks of the same size.
    • The erasure code algorithm calculates M parity blocks for every N consecutive data blocks. (The value of M is smaller than that of N.)
    • N+M data blocks are concurrently stored to different disks.
    • In erasure code storage mode, the storage system tolerates a concurrent failure of N-l disks at most.

14. Which of the following disks are used by an N8500 clustered NAS engine as system disks?

    • Fibre Channel disks
    • SAS disks
    • SATA disks
    • SSDs

15. Which of the following issues are resolved by big data storage security technology? (Select three)

    • Integrity
    • Confidentiality
    • Availability
    • Continuity

16. Based on full interconnection of data channels and communication channels, a clustered NAS system employs cluster volume management to manage global storage space. Specifically, any nodes in a cluster can access the same storage space using the same volume device name, ensuring access consistency.

    • True
    • False

17. The stripe file system data of an N8500 clustered NAS storage system is stored on multiple data disks in the same way as data in RAID 0. The stripe file system provides high read/write performance but low security.

    • True
    • False

18. Which of the following statements about the OceanStor Toolkit installation of the OceanStor 9000 is incorrect?

    • The OceanStor Toolkit can be installed on any storage node.
    • The PC used for installation is connected to a storage node through port eth0.
    • The IP address of the network port used to upload the OceanStor Toolkit must be configured on the same network segment as the management network.
    • After the OceanStor Toolkit is successfully installed, enter https://xx.xx.xx.xx:8088/tools in the Internet Explorer address box to go to the login page.

19. Which of the following statements about IP address planning for the N8500 clustered HAS storage systems is incorrect?

    • Each service network port, management network port on an engine node, and management network port on a storage unit must have a physical IP address.
    • Each service network port and management network port on an engine node must have a virtual IP address.
    • Ensure that the physical IP address and virtual IP address of each port reside on the same network segment.
    • It is recommended that the console IP address reside on the same network segment as the service network.

20. Which of the following statements about the high availability daemon (HAD) function of an N8500 clustered NAS system are correct? (Select three.)

    • Each host in the N8500 cluster runs a HAD process.
    • The hastart command can be executed to enable the had and hashadow services to automatically start.
    • HAD is used to monitor and manage the statuses of all services on the clustered NAS system.
    • The clustered system uses hashadow to monitor the HAD process. If HAD becomes abnormal, hashadow can restart HAD.