Which of the following is correcting regarding the read and write performance of the Huawei Oceanstor 9000 node, from highest to lowest?

A. P25 Node SSD Hard Drive> P25 Node SAS Hard Drive> P36 Node SATA Hard Drive> P12 SATA Hard Drive> C36 SATA Hard Drive

B. P25 Node SAS Hard Drive> P25 Node SSD Hard Drive> P36 Node SATA Hard Drive> P12 SATA Hard Drive> C36 SATA Hard Drive

C. P25 Node SSD Hard Drive> P25 Node SAS Hard Drive> P36 Node> C36 SATA Hard Drive> P12 SATA Hard Drive

D. P25 Node SSD Hard Drive> P25 Node SAS Hard Drive> C36 SATA Hard Drive> P36 Node SATA Hard Drive> P12 SATA Hard Drive

What is the error in the Oracle ASM description?

A. ASM directly manages the hard disk, not the files, the files are evenly distributed across all the disks.

B. ASM instance SGA includes buffer pool share pool larger pool and so on.

C. ASM instances can be synchronized and data instances started and synchronized, and must be closed later than the database instance.

D. ASM is an oracle-based storage solution similar to RDMS, consisting of instances and files, maintained by the sql plus tool.

The RMAN command dbms-rcvcat in the three PL / SQL packages is used to query the recovery catalog and target database control files, such as the list, report commands or a call to the package.

A. True

B. False

VTL 6900 engines A and B nodes form a cluster, on the A, B node between the business bearer and the fault automatically switch, which of the following description is correct? (Multiple choice)

A. When the node a is found through the sms -v command, the status of the IPStor Authentication Module is FAIL. The service of the node A will be from Move to Node B.

B. unplug the A node power supply, A node's business will automatically switch to the B node

C. unplug the A node and the backup server network connection, the A node's business will automatically switch to the B node

D. A, B nodes can work in Active-Active mode, but can only manually achieve the backup service load balancing between A and B nodes

True or False, The smart Matrix architecture is a multi-control interconnected system architecture designed by Huawei for the core storage system of an enterprise data center. Based on the smart matrix principle, Huawei OceanStor 18000 supports up to 16 engines (32 controllers) cluster.

A. True

B. False

An Oracle client software is installed on the client host A, now there is a requirement to use it to access a remote database on host B, which of the following files need to be modified on the host A or B? (Multiple Choice)

A. listener.ora

B. The "profile" of oracle user

C. tnsnames.ora

D. pfile parameter file

What are the precautions for VTL6900 product division? (Multiple choice)

A. 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

B. SIR data The number of LUNs is 2's power of N

C. SIR index LUN size is at least 4% of SIR data LUN size

D. It is not recommended to divide RAID across frames

Which of the following is correct about the InfoStamper feature of an OceanStor 9000 storage system: (multiple choice)

A. Snapshot does not support nested, that is, the snapshot has been created directory, the parent directory and subdirectories can no longer create a snapshot

B. The root directory of the snapshot (that is, the directory used to create the snapshot) does not support deletion

C. Hard links are protected by snapshots, soft links are not protected by snapshots

D. 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

Which of the following descriptions of the import parameters for the physical tape of the VTL6900 is correct?

A. copy Mode: This mode to develop physical tape data copy to the corresponding virtual tape, at the same time the development of the physical tape recycling

B. Direct AccessMode: This mode only copies the beginning of the physical tape 10MB data, contains the data stored on the tape backup software, without having to copy the backup data

C. Recycle Mode: This mode is to block copy mode, the entire tape is copied to the virtual tape

D. Recycle Mode: This mode will automatically recycle the tapes that have passed the data retention period

In a synchronous replication scenario, an application's peak write throughput is 16 MB/s, average write throughput is 500 KB/s, average write 1/0 size is 8 KB, private information overhead is about 11%, and the FC network bandwidth utilization rate is 70%. The throughput of the disaster recovery network must be at least ( ).

A. 206 Mbit/s

B. 23 MB/s

C. 16 MB/s

D. 800 KB/s