A customer production center is in Chengdu with a disaster recovery center in Shenzhen, using VIS 6600T remote replication capabilities to meet the remote disaster recovery. Which of the following about the VIS6600T copy function is correct?
A. DCM (data change map) is mainly used to ensure that the data in the production center is copied to the disaster recovery center according to the order sent by the host to ensure the data consistency
B. Production, disaster recovery data volume and disaster recovery must be consistent, the name can be inconsistent
C. Each business configuration a copy volume group, multiple copy volume group can use the same virtual IP
D. virtual IP and physical IP must be in the same network segment
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
A customer project deploys an 8-node OceanStor 9000 C Node with full front-end and back-end IB networking. The device is powered on and completes all front-end network ports. During customer front-end business switch interoperability testing, engineers will perform Oceanstor 9000 software installation and deployment. What is considered a best practice for this?
A. The engineer thinks the installation PC is connected to NIC1 to complete the software deployment, so connect the installation PC to NIC1
B. Direct Deployment of Software Without Disconnecting Front End Network and All Network Nodes
C. Software Deployment Before starting, the engineer configures a temporary back-end IP address on the back end network port B3-0 of the 9000 node (connected to the installation PC) Department DHCP server
D. The installation of PC directly through the network cable connected to the OM management network switch to complete the software deployment
RAC is a typical "multi-instance, single-database" architecture that is shared by all nodes, accessed in parallel, including database data files, control files, parameter files, online reorganization log files, and even archived log files are placed on shared storage and guaranteed to be simultaneously accessible by all nodes
A. Correct
B. mistakes
The InfoEqualizer DNS IP address needs to be the same as the OceanStor 9000 front-end network and customer application network for network interoperability
A. Correct
B. mistakes
A RedHat Linux 6 system includes a specific file folder read and write errors, the file system needs to be modified after the diagnosis. Which of the following is the correct repair operations?
A. Direct use of the root user, in the case of the file system is mounted fsck repair
B. Using the owner of the user data file, perform an fsck fix if the file system is mounted
C. Use the owner of the user data file to perform a fsck fix on the device if the file system is unmounted
D. Using the root user, perform a fsck fix on the device while the file system is unmounted
When using lvm to create a mirrored logical volume, you should choose what kind of log file to save in order not to impact performance and quickly recover from a single drive failure?
A. store the log in memory
B. Store the log in any one of the two PVs
C. Store the log in the third PV of the current VG
D. Save the log in another VG pv
In two OceanStor unified storage arrays configured with remote replication, the optimal path for remote replication data transmission is:
A. Host - "Linking Primary Array Controller -" Linking From Array Controller -> (Forwarding) Controller operating from a LUN
B. Host - "Primary LUN Controller -" (Forwarding) Primary Device Controller for Linking - "Link from the array controller
C. Host - Primary LUN Controller -> (Forwarding) Link Primary Fabric Controller - "Linking From Array Controller -"Hair) from LUn work controller
D. Host - "Link-connected Primary Array Controller -" Link-connected slave array
A customer's production network resources are tight, and the budget is small. The current customer wants to introduce a backup solution in the existing configuration. Based on this, what is the recommended networking backup method is most appropriate for this customer?
A. lan-base
B. lan-free
C. server free
D. server base
Which of the following are correct regarding a Storage Array RAID 2.0 Typical Application Performance Tuning? (multiple choice)
A. Scenario: Sequencing large IO services, especially 1M IO scenarios, with the phenomenon that the back-end read bandwidth is much larger than the front-end read bandwidth Tuning: Turn off the corresponding LUN prefetch policy
B. scene: the order of pressure reading and writing business conditions, high utilization of hard drives Tuning means: increase the unplug-thresh device hard disk device
C. Scenario: Oracle database in the operation of data backup, the data on the LUN bandwidth does not meet the requirements and accompanied by high utilization of hard disk Tuning means: the formal creation of POOL to increase the depth of the points
D. Scenario: In the case of single concurrent or low concurrent read service, the delay is found to be large Tuning means: change disk unplug 8 Modify unplug - thresh increased from 4 to 8
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