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EMC D-VPX-DY-A-24 Exam Course: Dell VPLEX Deploy Achievement - ITPassLeader Easy to Pass

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EMC Dell VPLEX Deploy Achievement Sample Questions (Q49-Q54):

NEW QUESTION # 49
When using VPLEX Metro, what is the supported round trip time between clusters?

A. 5 ms
B. 15 ms
C. 30 ms
D. 20 ms

Answer: A

Explanation:
When using VPLEX Metro, the supported round trip time (RTT) between clusters is a crucial factor for optimal performance. The RTT is the time it takes for a signal to travel from one cluster to another and back again.
* RTT Importance: The RTT affects how quickly data can be synchronized between the two clusters. A lower RTT means faster synchronization, which is essential for maintaining the high availability and data consistency that VPLEX Metro is designed to provide1.
* Supported RTT: The supported network round trip latency for VPLEX Metro is up to 5 ms. This is the maximum latency that allows the system to perform optimally without significant performance degradation1.
* Performance Considerations: If the inter-cluster FC/IP WAN network experiences congestion, it can result in an increased RTT, which may cause performance issues. Therefore, it's important to ensure that the network infrastructure supports the required RTT1.
* Best Practices: Dell EMC recommends keeping the RTT as low as possible, ideally around 1 ms for a campus-wide network, to provide the best performance. However, VPLEX Metro can support RTTs up to 5 ms under optimal conditions1.
* Monitoring and Management: It's important to monitor the RTT regularly and manage the network to avoid congestion. Tools and techniques should be in place to measure and maintain the RTT within the supported range1.
In summary, the supported round trip time between clusters when using VPLEX Metro is 5 ms. This parameter is critical for ensuring that the VPLEX Metro operates within the designed performance specifications.

NEW QUESTION # 50
A company has VPLEX Metro protecting two applications without Cluster Witness:
. App1 distributed virtual volumes are added to CG1, which has detach-rule set cluster-1 as winner
. App2 distributed virtual volumes are added to CG2, which has detach-rule set cluster-2 as winner What should be the consequence if cluster-2 fails for an extended period?

A. I/O for CG1 is detached at cluster -1; I/O is serviced at cluster-2I/O for CG2 is detached at cluster -2; I/O is serviced at cluster-1
B. I/O for CG1 is serviced at cluster -1; I/O is suspended at cluster-2I/O is serviced for CG2 at cluster -2; I/O is suspended at cluster-1
C. I/O for CG1 is suspended at cluster -1; I/O is serviced at cluster-2I/O for CG2 is serviced at cluster -1; I/O is suspended at cluster-2
D. I/O for CG1 is suspended at cluster -1; I/O is serviced at cluster-2I/O for CG2 is serviced at cluster -2; I/O is suspended at cluster-1

Answer: C

Explanation:
In a VPLEX Metro environment without a Cluster Witness, consistency groups (CGs) are used to manage distributed virtual volumes with detach rules that determine the behavior during a cluster failure.
* CG1 with Cluster-1 as Winner: For App1, the distributed virtual volumes are added to CG1, which has a detach rule set with cluster-1 as the winner. This means that if cluster-2 fails, I/O for CG1 will continue to be serviced at cluster-1 after it automatically attaches the volumes that were distributed across both clusters1.
* CG2 with Cluster-2 as Winner: For App2, the distributed virtual volumes are added to CG2, which has a detach rule set with cluster-2 as the winner. In the event of a cluster-2 failure, I/O for CG2 will be serviced after the volumes are detached from cluster-2, allowing cluster-1 to take over and service the I/O1.
* Extended Cluster-2 Failure: If cluster-2 fails for an extended period, the VPLEX Metro will follow the detach rules set for each consistency group. CG1 will have its I/O serviced at cluster-1, and CG2 will also have its I/O serviced at cluster-1 after detaching from the failed cluster-21.
* No Cluster Witness: Without a Cluster Witness, the VPLEX Metro relies on the detach rules defined in the consistency groups to determine how to handle I/O in the event of a cluster failure1.
* Operational Continuity: The goal is to maintain operational continuity for both applications. By servicing I/O for both CG1 and CG2 at cluster-1, VPLEX ensures that both applications remain operational despite the failure of cluster-21.
In summary, if cluster-2 fails for an extended period in a VPLEX Metro setup without a Cluster Witness, I/O for CG1 will be serviced at cluster-1, and I/O for CG2 will also be serviced at cluster-1 after detaching from cluster-2, as per the detach rules set for each consistency group.

NEW QUESTION # 51
What is a requirement for zoning FC WAN COM ports on a VPLEX Metro?

A. Each FC00 port in the local cluster is zoned to the FC00 port for each director in the remote cluster
B. Generate a command script with the IPComConfigWorksheet_v.x.x.zip tool
C. Each WAN COM port in the local cluster is zoned to all WAN COM ports in the remote cluster
D. Each FC00 port in the local cluster is zoned to the FC01 port for each director in the remote cluster

Answer: C

Explanation:
For zoning FC WAN COM ports on a VPLEX Metro, the requirement is that each WAN COM port in the local cluster must be zoned to all WAN COM ports in the remote cluster. This setup ensures that there is a redundant network capability where each director on one cluster communicates with all the directors on the other site, even in the event of a fabric or network failure1.
* Zoning Configuration: The zoning needs to be fixed such that all A2-FC00 only see (are zoned with) remote A2-FC00 ports, and similarly for A2-FC01 with A2-FC01, and so on for all WAN COM ports1.
* Redundant Network: This zoning configuration provides a redundant network capability, which is essential for maintaining communication between the two VPLEX clusters in a Metro configuration1.
* Fabric Separation: The FC WAN COM ports will be connected to dual separate backbone fabrics or networks that span two sites, allowing for data flow between the two VPLEX clusters without requiring a merged fabric between the two sites1.
* Best Practices: For configuring FC WAN COM ports, it is recommended to refer to the
"Implementation and Planning Best Practices for EMC VPLEX Technical Notes" provided by Dell1.
In summary, the requirement for zoning FC WAN COM ports on a VPLEX Metro is to ensure that each WAN COM port in the local cluster is zoned to all WAN COM ports in the remote cluster, providing a robust and fault-tolerant communication network.

NEW QUESTION # 52
What are characteristics of a storage view?

A. An initiator can be in multiple storage views
VPLEX FE port can be in multiple storage views
Each initiator and FE port pair can only be in one storage view
B. An initiator can only be in multiple storage view
VPLEX FE port can be in multiple storage views
Each initiator and FE port pair must be in different storage views
C. An initiator can be in multiple storage views
VPLEX FE port can only be in one storage view
Each initiator and FE port pair can only be in one storage view
D. An initiator can only be in one storage view
VPLEX FE port can be in multiple storage views
Each initiator and FE port pair can be in different storage views

Answer: A

Explanation:
A storage view in Dell VPLEX is a construct that defines the visibility and access control of storage resources for hosts connected to the VPLEX system. The characteristics of a storage view are crucial for ensuring proper access and management of storage resources.
* Initiator Access: An initiator, which is typically a host bus adapter (HBA) on a server, can be part of multiple storage views. This allows a single server to access different storage resources that may be segregated for organizational, performance, or security reasons1.
* VPLEX FE Ports: VPLEX Front-End (FE) ports can be included in multiple storage views. This design allows for flexibility in connecting multiple hosts to various storage resources through the same FE port1.
* Initiator and FE Port Pairing: While an initiator can be in multiple storage views and a VPLEX FE port can be part of multiple storage views, each specific initiator and FE port pair can only be in one storage view. This restriction ensures that a unique path is maintained between a host and its storage resources, which is important for managing access and avoiding conflicts1.
* Storage View Configuration: When configuring a storage view, it is essential to correctly map the initiators to the VPLEX FE ports and assign the appropriate virtual volumes. This setup defines which hosts can access which storage volumes through which paths1.
* Best Practices: It is recommended to follow Dell's best practices for VPLEX storage views to ensure optimal performance, security, and manageability. These practices include proper zoning, LUN masking, and storage view management as outlined in Dell VPLEX documentation1.
In summary, the verified characteristics of a storage view in a Dell VPLEX environment are that an initiator can be in multiple storage views, a VPLEX FE port can be in multiple storage views, but each initiator and FE port pair can only be in one storage view. This configuration ensures that storage resources are properly allocated and managed within the VPLEX system.

NEW QUESTION # 53
What is the purpose of issuing the batch-migrate check-plan command?

A. Determines if the front-end IO rate is below the predetermined threshold
B. Verifies that the source devices are not in a storage view
C. Verifies that the target devices have no virtual volumes configured
D. Determines if there is currently enough back-end bandwidth

Answer: C

NEW QUESTION # 54
......

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