H13-629 : HCIE-Storage : Part 15
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Which of the following statements about Huawei OceanStor V3 series storage array synchronous remote replication and asynchronous remote replication is incorrect? (Multiple choice)
- Synchronous remote replication and asynchronous remote replication should use the progress of the bitmap
- Synchronous Remote Replication To use differential logging, asynchronous remote replication uses differential bitmaps
- Synchronous remote replication and asynchronous remote replication are used snapshots
- Troubleshoot a replication task in a remote replication consistency group Do not affect tasks in other groups
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Which statements are true about the performance of RAID 10 and that of RAID 5? (Multiple choice.)
- RAID 5 outperforms RAID 10 in continuous random read.
- RAID 5 outperforms RAID 10 in continuous sequential read and write.
- RAID 10 outperforms RAID 5 in continuous sequential write.
- RAID 5 and RAID 10 provide almost the same performance level in continuous random read..
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On the command line of the N8500 (V200R001) clustered NAS system, you run the NFS> share add / vx / xs-cmfs 100.43.13.210 command.
One system that is used NFS sharing has IP address 100.43.13.11. If the client operating system is Suse Linux, which of the following access to the description of the file system is correct: (multiple choice)
- Not just the host with IP 100.43.13.210 can access this NFS share
- To query the client for all the NFS shares on the service IP, use the command: showmount -e 100.43.13.11
- Mount the NFS shared file system locally and execute: mount -t nfs 100.43.13.11:xs-cmfs / mnt
- Verify that NFS shared file system has been mounted locally, executable: mount
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Client server resources are limited but there is sufficient network bandwidth. What kind of deduplication strategy should be used if the client data needs to be backed up to the physical tape?
- source-side deduplication (backup software)
- target-side deduplication (backup software deleted)
- Target-side de-duplication (backup software global deduction)
- target-side deduplication (backup media deleted)
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What are the precautions for VTL6900 product division? (Multiple choice)
- The size of the LUN provided by the VTL back-end storage does not exceed 4TB. The default configuration is write-back, mirroring, and the depth of the slice is 64KB
- SIR data The number of LUNs is 2’s power of N
- SIR index LUN size is at least 4% of SIR data LUN size
- It is not recommended to divide RAID across frames
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Which of the following is not true about the working principle of CIFS: (multiple choice)
- Before establishing a shared connection, establish a session and then negotiate the agreement
- establish a shared connection before the file operation
- in the agreement negotiation stage for safety certification
- file operation is completed, does not require client requests, the server will automatically disconnect the shared connection
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When formatting a newly created LUN on OceanStor V3, LUN formatting fails. Which of the following conditions will cause this problem? (Multiple choice)
- The RAID group where the LUN resides is downgraded or invalidated
- The connection between the host and the storage is broken
- Formatting process made a master-slave switching operation
- A controller reset
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Production time is Monday to Friday 8:00 to 18:00. There are three LUNs, respectively LUN1, LUN2, LUN3, LUN1 with a size of 500G, all IO.
The average response time needs to be within 5ms, the size of LUN2 is 4TB, the coexistence of hot and cold data (with 12.5% of the hot data), and the size of LUN3 is 10TB. If performance requirements are not high and the engineer plans to use SmartTier, which of the following description is correct? (Multiple choice)
- Use 3-tier Tier, 1TB high performance layer, 4TB performance layer, 10TB capacity layer, and configure LUN1 to allocate high-performance layer capacity first, LUN2 preferentially allocates performance layer capacity and LUN3 preferentially allocates capacity layer capacity
- Use 3-tier Tier, 1TB high-performance layer, 4TB performance layer, 10TB capacity layer, configure LUN1 and LUN2 to migrate automatically, and LUN3 priority allocation of low-performance layer capacity
- The use of 3-tier Tier, high-performance layer 1TB, performance layer is 4TB, capacity layer is 10TB, while configuring LUN1, LUN2, LUN automatic relocation. The LUN3 is migrated preferentially to the low-performance layer
- Set the monitoring period of the Smart tier to 8:00 to 18:00 every day from Monday to Friday. The migration period is not overlapped with the monitoring period
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Maintenance personnel discovered a storage fault indicator light. You log in to the management interface and found a RAID group failure and replaced the hard disk. In this process, the maintenance personnel used the following basic troubleshooting methods:
- Logical reasoning
- Phenomenon analysis method
- Replacement method
- Alarm Information Analysis
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Under the condition of synchronous replication, the peak write bandwidth of an application is 16 MB / s, the average write bandwidth is 500 KB / s, and the average write IO is 8 KB. If the bandwidth utilization rate is 80%, then the disaster recovery end network bandwidth should not be less than:
- 180Mb / s
- 5.5Mb / s
- 22.5 Mb / s
- 5.5 Mb / s
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Which of the following describes the correct steps of an Oracle database backup?
1, backup oralce control file
2, backup oracle archive log
3, oralce placed in backup mode
4, oracle placed in normal mode
5, backup oracle data files- 3,5,2,1,4
- 3,1,5,4,2
- 3,5,2,4,1
- 3,5,1,2,4
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True or False, the deployment process in a Huawei Active / Standby Disaster Recovery System is as follows:
1. Solution networking
2. Synchronizing data to disaster recovery end
3. Disaster recovery deployment at disaster recovery end
4. Configuration of the protection group
5. Acceptance test
- True
- False
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The OceanStor VIS6600T includes the following devices:
1. Host
2.VIS 6600T
3. Array
4. Fiber switch
Since there is a certain dependency between the above devices, the power-down needs to be performed according to a certain sequence. Which of the following power-off sequences is correct:
- 4 1 2 3
- 4 2 1 3
- 1 2 3 4
- 3 2 1 4
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The N8000 file system is based on dynamic hierarchical storag. Through the multi-volume file system, you can achieve the same file system text pieces stored in different levels of storage media, such as hot data and ordinary data stored in the SSD disk and SATA disk.
- True
- False
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Which of the following is true about the principle of Huawei Oceanstor V3 smart cache: (multiple choice)
- When an IO arrives at the storage system, in order to avoid affecting the write performance, the data in the smart cache will not be any changes due to the IO
- When reading the data in the missing smart cache, the smart cache pool directly forwards the read IO request to the HDD
- If OceanStor V3 is shared between services A and B, the same custom smart cache partition can be used
- The system generates a default smart cache partition for each controller by default
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Which of the following is correct about the InfoStamper feature of an OceanStor 9000 storage system: (multiple choice)
- Snapshot does not support nested, that is, the snapshot has been created directory, the parent directory and subdirectories can no longer create a snapshot
- The root directory of the snapshot (that is, the directory used to create the snapshot) does not support deletion
- Hard links are protected by snapshots, soft links are not protected by snapshots
- For a snapshot with an expiration time set, the system automatically deletes the snapshot but does not back up the storage space occupied by the snapshot data after the snapshot expires
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On the command line of the N8500 (V200R001) clustered NAS system, you run the NFS> share add rw, no_root_squas / vx / xscmfs command. Which of the following is correct regarding this?
- The client can modify the file system when it accesses it
- It allows asynchronous writes to the file system and writes to the disk of the file system when the operation request is not responding
- It sets the client’s root user does not have root privileges to access the NFS shared file system
- NFS shares created can be accessed by all clients
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Which of the following is a description of the WORM feature of OceanStor V3: (Multiple choice)
- When the file is locked, the file protection time can be extended or shortened by manual operation
- Locked file system WORM clock is greater than the file atime value, the file will be in an expired state
- When the file is in an append state, after the legal clock of the WORM file system exceeds the file expiration time, the file is moved
Moved to expired status - When the size of the file is 0 bytes, the lock state can be migrated to the additional state
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A computer center plans to purchase a set of Huawei Oceanstor 9000 products as a follow-up storage system. The requirements are as follows:
(1) The minimum storage system needs to provide a total bandwidth of 3-4GB / s
(2) storage space can reach 1PB, to meet a single file GB storage
(3) computer center room requires control deployed in a cabinet use
(4) Internal computer cluster nodes are now all InfiniBand network
Based on the above information, which of the following configuration suggestions do you think is more suitable for this project?
- Because computing tasks are designed for large file services, it is more appropriate to deploy with an 8-node OceanStor 9000 C node. The capacity on the use of 4TB SATA, to meet customer needs
- Using Oceanstor 9000 C Node combined with the total bandwidth and total capacity requirements, consider the 8-node configuration 4TB SATA full disk, backend 10GETOE + front-end IB networking
- From the reliability point of view, it is recommended to use the InfoEqualizer function to access the OceanStor 9000 storage through a domain name. The InfoEqualizer DNS segment needs to be considered and OceanStor 9000 back-end to interoperability
- OceanStor 9000 supports front-end 10GE TOE + back-end IB networking, the front-end is easy to log in and manage with the management PC interworking, considering this networking solution can reduce the cost of front-end IB switches.
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When using OceanStor V3, you need to mount the file system snapshot to access the snapshot data.
- True
- False
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