H13-622 : Huawei Certified Network Professional- Constructing Big Data Solution : Part 05
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An NS500 clustered NIAS system provides file system sharing. Which of the following statements about the N8500’s file system mechanism and related features are correct? (Select three)
- The N8500 clustered file system VxFS is not a log file system, and it supports a capacity of over 2 TB.
- The file system snapshot feature employs the copy-on-write mechanism and shares the storage space of partitions or volumes with other file sets.
- The snapshots provided by the N8500 are based on the file system level.
- File system snapshot, mirroring, and replication are implemented based on storage checkpoints.
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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.)
- The CPU usage of I/O wait is 2.3%.
- The number of I/O requests sent per second is 7.13.
- The number of blocks read per second is 640119.
- The CPU usage of application operation is 2,15%.
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Hadoop is an open-source software framework for distributed processing of massive data. Hadoop has performance and cost advantages in terms of unstructured data processing.
- True
- False
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Which of the following statements about the DST feature of an N8500 clustered NAS system are incorrect? (Select three)
- DST involves three tiers.
- Each tier can contain many volumes.
- All files are initially stored on tier 1.
- The location where metadata is stored cannot be manually specified.
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For N800 V200R001, you can log in to the storage system using the support account and run fsck -t vxfs -o full -y /dev/vx/dsk/sfsdg/fs001 to implement full verification for the fs00l file system.
- True
- False
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Which of the following is an unstructured data application?
- ERP
- HIS database
- Education VoD
- Enterprise financial system
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Which components of an N8500 clustered NAS system reside in the user space? (Select two)
- File system layer
- Application layer
- User management
- Operating system layer
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When planning IP addresses for the back-end storage network of the OceanStor 9000 which uses IB networking, you must plan two back-end storage IP addresses and one temporary IP address for each node.
- True
- False
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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.)
- During the startup of the OceanStor 9000, a namespace is automatically created with the same name as that of the OceanStor 9000.
- As the root directory of the entire system, a namespace cannot be shared or accessed. However, its subdirectories can be shared and accessed.
- A unified namespace provides a unified storage resource pool where storage space can be centrally managed and allocated.
- All shared directories are subdirectories in the unified namespace.
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Which command is used to query the NFS sharing status for N8500 V200R001?
- hagrp -status
- hagrp -state | grep NFS
- service NFS status
- service NFS show
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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.
- True
- False
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The following figure shows the ports of two CE6850 switches when the OceanStor 9000 uses GE for the front-end network and 10GE for the back-end network. If the OceanStor 9000 uses C nodes, the ports in which area of the CE6850 switch must ports AO-0 and A0-1 on all the C nodes be connected to?
H13-622 Huawei Certified Network Professional- Constructing Big Data Solution Part 05 Q12 003 - A
- B
- C
- You do not need to connect C nodes to the CE6850 switch.
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An N8500 clustered NAS engine does not need to be equipped with power modules.
- True
- False
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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.
- True
- False
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Which of the following statements about the file pool and file pool policies of the OceanStor 9000 is incorrect?
- One file can belong to different file pools,
- File pool policies come with priorities. For files, only the file pool policy of the highest priority takes effect.
- The characteristics of a file pool are in an AND relationship.
- File pool policies are available only after the InfoTier license is activated.
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The networking of an HUAWEI OceanStor 9000 big data storage system includes which of the following? (Select three)
- Front-end service network
- Back-end storage network
- Internal communication network
- IPMI management network
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The OceanStor 9000 WushanFS supports online node expansion. The storage capacity and computing capability are increased linearly, providing linearly increasing throughput and concurrency capabilities for users.
- True
- False
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It is recommended that the OceanStor 9000 use 10GE for both the front-end and back-end networks.
- True
- False
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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.
- True
- False
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The OceanStor 9000 can be installed in a Huavvei-supplied cabinet only.
- True
- False
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