Deck 10: Huawei Certified Network Professional- Constructing Big Data Solution

Question 1

Which of the following statements about the software features of the OceanStor 9000 are correct? (Select two)

A) The maximum supported file system capacity is 40 PB.
B) The maximum supported data recovery speed is 1 TB/hour.
C) Each node uses the cache on the node exclusively.
D) Thin provisioning and thick provisioning are both supported.

Answer 1

The maximum supported file system capacity is 40 PB.
The maximum supported data recovery speed is 1 TB/hour.

Question 2

Which of the following statements about the CIFS share are correct? (Select two)

A) CIFS normal share enables a directory to be accessed by all users.
B) CIFS homedir share enables a directory to be accessed by all users.
C) In Normal mode, a client can access a share through only one VIP.
D) Compared with the Normal mode, the Cluster mode provides higher data reliability but lower performance.

Answer 2

CIFS normal share enables a directory to be accessed by all users.
CIFS homedir share enables a directory to be accessed by all users.

Question 3

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

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

Answer 3

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.
The clustered system uses hashadow to monitor the HAD process. If HAD becomes abnormal, hashadow can restart HAD.

Question 4

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

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

Question 5

Which of the following statements about the software installation of the OceanStor 9000 are correct? (Select two.)

A) Before installing software, configure switches on the back-end storage network and the management network.
B) The OceanStor Toolkit must be installed on all storage nodes.
C) The OceanStor SystemReporter can be installed on any Windows server with qualified hardware and software.
D) You must purchase a license for the OceanStor SystemReporter.

Question 6

Which of the following are the mandatory hardware components of an N8500 clustered NASsystem? (Select two)

A) Fibre Channel switch
B) T series storage array
C) NAS engine
D) Ethernet switch

Question 7

Which of the following statements about the N8500 configuration prerequisites are correct? (Select three)

A) The heartbeat network ports of the clustered NAS engine are correctly connected to the heartbeat network.
B) The service network ports of the clustered NAS engine are not connected to the customer's service network before they are configured.
C) The clustered NAS engine is correctly powered on and the statuses of the indicators are normal.
D) Hardware installation and cable connection of the clustered NAS engine are complete.

Question 8

In performance optimization of the N8500 clustered NAS storage systems, which of the following issues must the maintenance personnel be aware of concerning LUNs and controllers? (Select three.)

A) Create only one LUN for each RAID group.
B) Set LUNs to forcible write back without mirroring.
C) Ensure that the owning controller and the working controller of a LUN are the same.
D) Disks that compose a file system are evenly distributed on controllers.

Question 9

Which of the following are considered when planning the deployment of an N8000 clustered NAS storage system? (Select three)

A) Evenly distribute service loads among all cluster nodes. Employ port bonding to increase network bandwidths and enhance protection capability.
B) Plan the types of file systems for the storage system based on the performance and data integrity requirements of customers' environments.
C) Plan various RAID groups for the storage system to address the data integrity and read/write performance requirements of different application scenarios.
D) Select operating systems based on application requirements.

Question 10

In N8500 clustered NAS system V200R001, how many redundant heartbeat links are set up between two nodes?

A) 1
B) 2
C) 3
D) 4

Question 11

Which of the following statements about the InfoQuota feature of the OceanStor 9000 are correct? (Select three.)

A) Quotas can be set based on users.
B) Quotas can be set based on user groups.
C) Quotas can be set for file directories.
D) Quotas can be set for files.

Question 12

Which of the following storage units are used by an N8500 clustered NAS system? (Select three)

A) S2200T
B) S2600T
C) S5500T
D) S6800T

Question 13

Which of the following is the correct N8500 configuration procedure?

A) Go to the welcome page. > Confirm the networking. > Select a configuration file. > Configure storage units. > Configure the NA5 engine. > Configure the device location. > Complete the deployment.
B) Confirm the networking. > Go to the welcome page. > Select a configuration file. > Configure storage units. > Configure the NAS engine. > Configure the device location. > Complete the deployment.
C) Confirm the networking. > Go to the welcome page. > Configure storage units. > Select a configuration file. > Configure the NAS engine. > Configure the device location. > Complete the deployment.
D) Confirm the networking. > Go to the welcome page. > Select a configuration file. > Configure the NAS engine. > Configure storage units. > Configure the device location. > Complete the deployment.

Question 14

In Huawei OceanStor 9000, a file pool is a collection of files that have specific characteristics. A file pool policy defines rules for storing a file pool in a node pool.

Question 15

Which of the following statements about the CIFS protocol are true? (Choose all that apply.)

A) CIFS transmits data based on TCP.
B) CIFS transmits data based on UDP.
C) CIFS is a file sharing protocol used in Linux.
D) CIFS is a file sharing protocol used in Windows.

Question 16

Which of the following statements about the VCS services and resources provided by a clustered NAS system are correct? (Select three.)

A) A dependency relationship between service groups can be defined.
B) A dependency relationship between resources can be defined.
C) Each resource corresponds to one agent.
D) Resource dependency relationships can be defined in a cyclic manner.

Question 17

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

A) A file system snapshot can be created manually or automatically.
B) The maximum number of snapshots created for a file system is 256.
C) A snapshot that is automatically created is in online state by default.
D) A snapshot can be automatically removed by the system.

Question 18

Which of the following statements about the LUN planning of the N8500 clustered NAS storage systems are correct? (Select three)

A) The maximum capacity of a LUN is 16 TB.
B) LUNs in one RAID group belong to the same controller.
C) The 64 KB stripe depth is recommended for random services.
D) It is recommended that LUNs with heavy loads be in different RAID groups.

Question 19

When a NAS client attempts to connect to an OceanStor 9000 node, the user must enter the management IP address of the node.

Question 20

Which are the possible causes for file read/write performance decrease? (Select three)

A) A slow disk or bad sector exists,
B) The Fibre Channel port has a high bit error rate.
C) The LUN has been set to write back.
D) The prefetch policy does not apply to service data changes.

Question 21

Typically, how many storage units can be configured for a 4-node N8500 to implement direct- connection networking?

A) 1
B) 2
C) 3
D) 4

Question 22

An application requires high write performance and moderate reliability. To ensure that the N8500 clustered NAS storage system delivers the optimal write performance, set the LUN write policy to write back with mirroring.

Question 23

If homedir is enabled and a directory is specified, the OceanStor 9000 will automatically create a user directory for each user in the specified directory when local users or domain users access the OceanStor 9000 from clients for the first time. The users are authorized to read and write their own user directories. Other users, however, cannot access those user directories by default.

Question 24

An N8500 clustered NAS system has many services that help implement system functions, such as NFS and CIFS basic service groups. Which of the following is not a resource agent of the NFS service group?

A) NIC
B) Hashadow
C) Disk
D) IP

Question 25

The figure shows the rear view of a P node in an OceanStor 9000. When its front-end is a 10GE network and its back-end is an IB network, NICs 0 on all nodes in the basic cabinet must be connected to the GE switches in the same cabinet.

Question 26

The OceanStor 9000 externally provides a single file system that is managed by a unified file system namespace. All the objects involved in user operations such as storing files, setting a share, and managing permission reside in this namespace. Which of the following statements about a namespace are correct? (Select three.)

A) During the startup of the OceanStor 9000, a namespace is automatically created with the same name as that of the OceanStor 9000.
B) As the root directory of the entire system, a namespace cannot be shared or accessed. However, its subdirectories can be shared and accessed.
C) A unified namespace provides a unified storage resource pool where storage space can be centrally managed and allocated.
D) All shared directories are subdirectories in the unified namespace.

Question 27

An N8500 clustered NAS engine does not need to be equipped with power modules.

Question 28

In an N8500 clustered NAS system, the Veritas Volume Manager (VxVM) is located between the operating system and the data management system. The VxVM accesses disks using the interface provided by the operating system, makes the physical storage devices connected to hosts invisible, and provides a logical device layer for the data management system. The logical devices on this layer are called VxVM volumes.

Question 29

When you are using the OceanStor Toolkit to deploy an OceanStor 9000 storage system, you must configure the front-end network mask, front-end network gateway, back-end network mask, back-end network gateway, management network mask, and management network gateway in the configuration file of the OceanStor Toolkit.

Question 30

Which of the following statements about the principle of the file system snapshot feature provided by an N8500 clustered NAS system are correct? (Select two)

A) When a snapshot is created, a block mapping pointing to the data on the file system is generated.
B) If an original data block needs to be replaced for the first time, the new data block is copied to the snapshot reservation area.
C) If an original data block is replaced for the first time, the block mapping in the snapshot points to the data block in the snapshot reservation area.
D) If a data block that has replaced an original data block needs to be replaced by a new data block, the new data block is copied to the snapshot reservation area.

Question 31

You are required to check the installation environment before installing software on an OceanStor 9000 storage system. Which of the following conditions does not meet these requirements?

A) The OceanStor 9000 consists of three P nodes and one C node.
B) The storage nodes run SU5E Linux Enterprise Server 11 (x86_64) SP1.
C) The PC used for installation runs Windows 7.
D) The PC used for installation runs Internet Explorer 9.

Question 32

It is recommended that the OceanStor 9000 use 10GE for both the front-end and back-end networks.

Question 33

Which of the following statements about the file pool and file pool policies of the OceanStor 9000 is incorrect?

A) One file can belong to different file pools,
B) File pool policies come with priorities. For files, only the file pool policy of the highest priority takes effect.
C) The characteristics of a file pool are in an AND relationship.
D) File pool policies are available only after the InfoTier license is activated.

Question 34

On Huawei N8500 V200R001, gabconfig -a can be executed to query the port communication status of a GAB member in a cluster. Port h gen is the communication port of which member?

A) CFS
B) VCS
C) CVM
D) Heartbeat membership

Question 35

Which of the following statements about the DST feature of an N8500 clustered NAS system are incorrect? (Select three)

A) DST involves three tiers.
B) Each tier can contain many volumes.
C) All files are initially stored on tier 1.
D) The location where metadata is stored cannot be manually specified.

Question 36

Which of the following statements about the file sharing protocols of the OceanStor 9000 are correct? (Select three)

A) The OceanStor 9000 supports NFS and CIFS file sharing protocols.
B) The OceanStor 9000 is compatible with various operating systems, allowing file resource sharing in a heterogeneous network environment.
C) The sharing is by files.
D) The sharing service supports automatic load balancing.

Question 37

Which components of an N8500 clustered NAS system reside in the user space? (Select two)

A) File system layer
B) Application layer
C) User management
D) Operating system layer

Question 38

In Linux, the iostat command is run and the following output is displayed: # iostat Linux 2.6.9-8.11.EVAL (ts3-150,ts.cn.tlan)02/01/2014 avg-cpu: %user%nice%sys %iowait%idle 12.010.002.152.3083,54 Device: tpsBlk_read/sBlk_wrtn/sBlk_readBlk_wrtn hda7.13200.1234.73640119111076 Which of the following statements are correct? (Select two.)

A) The CPU usage of I/O wait is 2.3%.
B) The number of I/O requests sent per second is 7.13.
C) The number of blocks read per second is 640119.
D) The CPU usage of application operation is 2,15%.

Question 39

The OceanStor 9000 can be installed in a Huavvei-supplied cabinet only.

Question 40

The networking of an HUAWEI OceanStor 9000 big data storage system includes which of the following? (Select three)

A) Front-end service network
B) Back-end storage network
C) Internal communication network
D) IPMI management network

Question 41

If the file system sharing services are interrupted on an N8500 storage system, which of the following information must be collected for troubleshooting? (Select three)

A) Alarm information
B) Operations performed after the fault occurred
C) Clustered NAS configuration information
D) Number of storage unit disk enclosures

Question 42

If an OceanStor 9000 storage system consists of three P nodes and uses GE for the front-end network, how many IP addresses must be planned for the front-end service network segment?

A) 17
B) 18
C) 19
D) 20

Question 43

Which of the following statements about the 10 Gigabit Ethernet (10GE) is incorrect?

A) 10GE, an Ethernet transmission standard, become IEEE Std 802.3ae-2002 in 2002.
B) 10GE enables an Ethernet to transmit data at a rate of 10 Gbit/s, 10 times the rate of GE.
C) 10GE defines full-duplex and half-duplex links which are generally connected by network switches.
D) 10GE implements access at a high bandwidth and low latency. 10GE is suitable for scenarios such as media & entertainment, high-performance computing, and OLAP.

Question 44

An N8500 clustered NAS storage system cannot be logged in to using the master account. Which is the possible cause?

A) The console IP address conflicts with another IP address on the network.
B) The network port corresponding to the console IP address is not connected to a network cable or is in the shutdown state.
C) The user name and password have been changed.
D) A heartbeat link is down.

Question 45

If the InfoLink license is not activated in an OceanStor 9000 storage system, the system cannot balance loads coming from clients.

Question 46

Which of the following are characteristics of big data? (Select three)

A) Huge data volume
B) Authentic and valid data
C) Fast data circulation
D) Various data types

Question 47

The three mainstream storage forms are as follows: 1)SAN storage that provides block resources; 2)NAS storage that provides file system resources;3) object-based storage (OBS). SAN storage and NAS storage are traditional storage forms. Which of the following statements about the characteristics of the three storage forms are correct? (Select three.)

A) In traditional storage forms, disks are partitioned, file systems record file structures based on a tree relationship, and metadata is used to identify the use of blocks.
B) Objects are the basic units of OBS. Each object is a composite of data and data property sets.
C) In the OBS mechanism, data and metadata are stored and managed in a distributed manner.
D) OBS is typically oriented to structured data applications.

Question 48

Which of the following statements about the intelligent load balancing feature of the OceanStor 9000 are correct? (Select three.)

A) Performance is balanced among all nodes. Capacity cannot be balanced among all nodes.
B) Nodes can be divided into zones. An independent load balancing policy and an independent domain name can be configured for each zone.
C) Load balancing policies can be based on CPU usage, memory usage, bandwidth usage, number of network connections, and/or node capability.
D) The OceanStor 9000 provides the load balancing service based on round robin, CPU usage, or the number of connections to a node.

Question 49

The figure shows the file pool policy configured for an OceanStor 9000 storage system. The monitoring and migration time is 2: 00-4: 00 a.m. every day. At 9: 00 a.m. on Monday, file A was created in the \example\test directory. By 10: 00 a.m., file A had been read and written for 15 times and the file size became 150 MB. After that, file A was no longer accessed. At 9: 00 a.m. on Tuesday, in which tier is file A stored?

A) Small-data tier
B) High-performance tier
C) High-bandwidth tier

Question 50

Which of the following storage services can the N8500 clustered NAS system that employs the integrated networking mode provide for application servers? (Select three.)

A) CIFS
B) 10 Gbit/s iSCSI SAN
C) SASSAN
D) FCSAN

Question 51

Which of the following statements about NewSQL databases are correct? (Select three)

A) MPP databases are not NewSQL databases.
B) NewSQLdatabases have the capability to store and manage massive data.
C) NewSQLdatabases support ACID and SQL as traditional databases do.
D) NewSQLindicates various new databases that provide scalability and high performance.

Question 52

For one or more Windows clients to access the storage resources on an OceanStor 9000 storage system, the administrator needs to create a directory under the root directory on the specified storage node and authorize the new directory to the target user or user group.

Question 53

The OceanStor 9000 allows users to define file pool polices based on file attributes and I/O frequency. Which of the following statements about file pool polices are correct? (Select three.)

A) A create policy is used to determine the initial location where a newly created file is to be stored. Such a policy includes the following items:file storage path, file name, and UID/GID.
B) A relocate policy is used to determine the target location where a file is to be migrated.
C) A delete policy is used to determine when to delete a file from the system.
D) A modify policy is used to determine how to modify a file.

Question 54

In the OceanStor 9000, a node pool is a collection of nodes that have the same characteristics such as physical type and access performance, and DST allows a user to divide physical nodes in the same file system into node pools.

Question 55

Which network file sharing protocols are supported by a NAS storage system? (Choose all that apply.)

A) FAT32
B) NTFS
C) NFS
D) CIFS

Question 56

The license must be purchased for which of the following software features of the OceanStor 9000? (Select three.)

A) WushanFS
B) InfoLink
C) InfoQuota
D) InfoTier

Question 57

Which of the following interface cards can be installed in the PCIe expansion slot on the P node of the OceanStor 9000? (Select three)

A) 2-portTOE 10GE network adapter
B) 2-port IB network adapter
C) 2-port GE network adapter
D) 2-port 8 Gbit/s Fibre Channel interface card

Question 58

When using the OceanStor Toolkit to deploy an OceanStor 9000 storage system, the IP addresses specified in IP address segment in the Configure DHCP area can only be use for the deployment. After the deployment is successful, the IP addresses of each node are changed to those as planned in the configuration file.

Question 59

Which of the following statements about the InfoTier feature of the OceanStor 9000 are correct? (Select two)

A) The InfoTier license must be purchased.
B) This feature can be used only when the storage system has different types of nodes.
C) This feature can be used when the storage system has different types of disks.
D) After this feature is enabled, you can set the high and low watermarks for a specified node pool.

Question 60

Which of the following can be used to manage secure access to NFS shares? (Select two.)

A) AD
B) NIS
C) LDAP
D) Homedir

Question 61

In the cluster communication architecture employed by an NS500 clustered NAS system, modules such as the resource agent, HAD, GAB, and Low Latency Transport (LLT) must collaborate to implement cluster communication. Which of the following statements about the work mechanisms of these modules are correct? (Select three)

A) The agent monitors the resources of each system and provides the status information for the HAD of each machine.
B) If a cluster node is abnormal or faulty, the HAD takes correct actions, for example, performing a failover.
C) The GAB implements a point-to-point communication mechanism. The master node sends the other cluster nodes the information that needs to be synchronized.
D) LLT is a MAC-layer protocol unrelated to IP layer.

Question 62

A big data processing system involves five layers: data collection, data storage, data processing, data analysis, and data application and presentation. Which of the following statements about the five layers are correct? (Select two)

A) Data collection is implemented based on data sources. Attention must be paid to the use of structured and unstructured database technologies.
B) Data storage resolves the massive data storage issue. Attention must be paid to data variety and heterogeneous data convergence.
C) Data processing features high velocity. Attention must be paid to the parallel computing technology.
D) Data analysis and application highlight data value. Attention must be paid attention to data mining, business intelligence, and data search.

Question 63

Which of the following device indicator states will not appear after an OceanStor storage system powers up and operates properly?

A) The system Alarm indicators are off.
B) The disk Running indicators are steady green.
C) The disk Alarm/Location indicators are steady red.
D) The system Running indicators on the GE switches are blinking green.

Question 64

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

A) 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.
B) Each service network port and management network port on an engine node must have a virtual IP address.
C) Ensure that the physical IP address and virtual IP address of each port reside on the same network segment.
D) It is recommended that the console IP address reside on the same network segment as the service network.

Question 65

Which of the following components comprise the Storage Foundation of an N8500 clustered NASsystem? (Select two)

A) VxVM
B) VCS
C) VxFS
D) SFS

Question 66

In the cluster communication architecture employed by an N8500 clustered NAS system, modules such as the resource agent, HAD, GAB, and Low Latency Transport (LLT) must collaborate to implement cluster communication. Which of the following statements about the work mechanisms of these modules are correct? (Select three)

A) The agent monitors the resources of each system and provides the status information for the HAD of each machine.
B) If a cluster node is abnormal or faulty, the HAD takes correct actions, for example, performing a failover.
C) The GAB implements a point-to-point communication mechanism. The master node sends the other cluster nodes the information that needs to be synchronized.
D) LLT is a MAC-layer protocol unrelated to IP layer.

Question 67

There are four types of ports on the N8500 clustered NAS engine nodes: heartbeat port, management port, service port, and storage port. Which of the following statements about the port types in the figure are correct? (Select two.)

A) 1 indicates a service port.
B) 2 indicates a storage port.
C) 3 indicates a heartbeat port.
D) 4 indicates a management port.

Question 68

Which of the following service ports are provided by an N8500 clustered NAS system? (Select two.)

A) GE
B) 10GE
C) Fibre Channel
D) SAS

Question 69

The HUAWEI OceanStor Toolkit V100R001 is used for preventive maintenance. The preventive maintenance wizard does not include which of the following?

A) Select Devices
B) Select Check Items
C) Set Check Policy
D) Export Check Policy

Question 70

Which of the following statements about Huawei 9000 big data solutions is incorrect?

A) Huawei big data storage products support InfiniBand/lOGE/GE networking modes.
B) Huawei big data storage products employ scale-out architecture.
C) Huawei big data storage products are based on the MPP DB.
D) Huawei big data storage products support dynamic storage tiering (DST).

Question 71

An N8500 clustered NAS system is equipped with four engine nodes and each engine node provides four service network ports. How many virtual IP addresses must be planned for the N8500?

A) 15
B) 16
C) 17
D) 18

Question 72

Which of the following statements about the Global Cache technology employed by the WushanFS are correct? (Select three.)

A) Global Cache enables the memory space on all storage servers to form a unified memory resources pool logically.
B) Data cached on a node cannot be hit by the read/write service of another node.
C) Global Cache helps improve the sharing of memory resources among nodes.
D) The WushanFS uses the distributed lock mechanism to implement global management of cached data. The same service data is cached only on one node. Another node that needs to access the service data can apply for a lock to obtain the cached data.

Question 73

If the internal link is faulty in an N8500 clustered NAS storage system, which of the following items can be skipped during troubleshooting?

A) The heartbeat network between engines
B) The network between an engine and a disk enclosure
C) The Fibre Channel network between an engine and a storage unit
D) The network between a storage unit controller enclosure and a storage unit disk enclosure

Question 74

Which command is used to check whether the file system is in the online state for N8500 V200R001?

A) storage fs list
B) storage fs online
C) storage fs status
D) storage fs status show

Question 75

An N8500 provides synchronous volume mirroring, which is similar to implementation of RAID 1 for the file system.

Question 76

An N8500 clustered NAS system is equipped with six engine nodes and four S5500T storage arrays. Each engine node provides eight service network ports. How many IP addresses must be configured for the N8500?

A) 103
B) 104
C) 105
D) 106

Question 77

A customer has purchased an N8500 clustered NAS storage system configured with ten 1 TB SAS disks and twelve 1 TB NL-SAS disks. Two RAID groups are planned. RAID group 1 is a RAID 5 consisting of nine SAS disks. RAID group 2 is a RAID 6 consisting of 11 NL-SAS disks. Two global hot spare disks are configured. What is the available capacity of the storage system?

A) 20 TB
B) 14 TB
C) 15.6 TB
D) 18.4 TB

Question 78

The InfoLink function is enabled on an OceanStor 9000 storage system. If the node to which a client connects becomes faulty and a failover occurs, which of the following statements is incorrect?

A) If the client accesses a shared directory through CIFS, the failover will cause disconnection and the client will need to reconnect to the storage system.
B) If the client accesses a shared directory through NFS V4, the failover will cause disconnection and the client will need to reconnect to the storage system.
C) If the client accesses a shared directory through NFS V4, the failover will not affect the connection.
D) If the client accesses a shared directory through NFS V3, the failover will not affect the connection.

Question 79

InfiniBand is used for communication between servers, between a server and a storage device, and between a server and a network.

Question 80

Which of the following statements about the InfoLink feature of the OceanStor 9000 are correct? (Select two.)

A) If clients attempt to access the OceanStor 9000 using domain names, the InfoLink license must be activated.
B) If clients attempt to access the OceanStor 9000 using domain names, a DNS server must be configured.
C) If a node becomes faulty, the system provides the failover function. This function does not need the InfoLink license to be activated.
D) After the InfoLink license is activated, the system balances loads based on round robin, CPU usage, number of node connections, node throughput, and comprehensive node loads.