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Latest EMC D-VPX-DY-A-24 Exam Discount & Test D-VPX-DY-A-24 Dumps Free

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EMC Dell VPLEX Deploy Achievement Sample Questions (Q59-Q64):

NEW QUESTION # 59
How many copies can RecoverPoint maintain in a MetroPoint topology?

  • A. 0
  • B. 1
  • C. 2
  • D. 3

Answer: A

Explanation:
"The MetroPoint topology can maintain up to five copies of data, including one remote copy and one local copy at each VPLEX site. It provides protection for each of the VPLEX Metro sites with continuous local replication via RecoverPoint"..


NEW QUESTION # 60
Which type of volume is subjected to high levels of I/O only during a WAN COM failure?

  • A. Logging volume
  • B. Virtual volume
  • C. Distributed volume
  • D. Metadata volume

Answer: A

Explanation:
Questions no: High I/O volume type during WAN COM failure
Verified answer:B. Logging volume
Step by Step Comprehensive Detailed Explanation with References:During a WAN COM failure in a VPLEX Metro environment, logging volumes are subjected to high levels of I/O. This is because the logging volumes are used to store write logs that ensure data integrity and consistency across distributed volumes.
These logs play a critical role during recovery processes, especially when there is a communication failure between clusters.
* Role of Logging Volumes: Logging volumes in VPLEX are designed to capture write operations that cannot be immediately mirrored across the clusters due to network issues or WAN COM failures1.
* WAN COM Failure: When a WAN COM failure occurs, the VPLEX system continues to write to the local logging volumes to ensure no data loss. Once the WAN COM link is restored, the logs are used to synchronize the data across the clusters1.
* High I/O Levels: The high levels of I/O on the logging volumes during a WAN COM failure are due to the accumulation of write operations that need to be logged until the link is restored and the data can be synchronized1.
* Recovery Process: After the WAN COM link is restored, the VPLEX system uses the data in the logging volumes to rebuild and synchronize the distributed volumes, ensuring data consistency and integrity1.
* Best Practices: EMC best practices recommend monitoring the health and performance of logging volumes, especially during WAN COM failures, to ensure they can handle the increased I/O load and maintain system performance1.
In summary, logging volumes experience high levels of I/O only during a WAN COM failure as they are responsible for capturing and storing write operations until the communication between clusters can be re-established and data synchronization can occur.


NEW QUESTION # 61
You are troubleshooting performance issues on a Microsoft SQL Server application hosted on a VPLEX virtual volume. You discover the volume is involved in a data mobility job with a transfer rate of 32 MB. It has been recommended to change this setting.
Which transfer rate will help improve the performance of the Microsoft SQL Server application?

  • A. 68 MB
  • B. 120 MB
  • C. 60 MB
  • D. 128 KB

Answer: B

Explanation:
When troubleshooting performance issues on a Microsoft SQL Server application hosted on a VPLEX virtual volume, adjusting the data mobility job transfer rate can have a significant impact on the application's performance. A higher transfer rate can help improve performance by allowing data to be moved more quickly, reducing the impact on the application's I/O operations.
* Assessing Current Performance: The current transfer rate of 32 MB may be insufficient for the workload of the SQL Server application, leading to performance issues1.
* Recommended Transfer Rate: Increasing the transfer rate to 120 MB can help alleviate these performance issues by accelerating the data mobility process, thus minimizing the time during which the SQL Server application's performance is impacted1.
* Implementing the Change: To change the transfer rate, the administrator would use the VPLEX CLI to adjust the settings for the data mobility jB. This involves modifying the transfer rate parameter to the new value of 120 MB1.
* Monitoring the Impact: After making the change, it's important to monitor the SQL Server application's performance to ensure that the new transfer rate is having the desired effect and not causing any additional issues1.
* Best Practices: It is recommended to follow best practices for data mobility and performance tuning as outlined in the Dell VPLEX documentation, which includes considering the impact of data mobility jobs on application performance1.
In summary, changing the data mobility job transfer rate to 120 MB is recommended to help improve the performance of the Microsoft SQL Server application hosted on a VPLEX virtual volume.


NEW QUESTION # 62
LUNs belonging to an ESXi cluster were encapsulated behind VPLEX. What information must be shared with the ESXi administrator so that they can re-discover the datastore and the RDM LUNs?

  • A. WWN:WWPN
  • B. UUID of back-end LUN
  • C. VML ID
  • D. Virtual volume VPD

Answer: D

Explanation:
When LUNs belonging to an ESXi cluster are encapsulated behind VPLEX, the ESXi administrator needs to be provided with the Virtual Volume Page Data (VPD) of the virtual volumes. The VPD contains metadata about the virtual volumes that allows the ESXi host to properly identify and interact with them.
* Encapsulation Process: During the encapsulation process, the physical LUNs are virtualized and presented as virtual volumes through VPLEX. This process involves the VPLEX claiming the LUNs and presenting them to the ESXi hosts as new devices1.
* Re-discovery of Datastore and RDM LUNs: After encapsulation, the ESXi administrator must perform a rescan of the storage adapters to discover the new virtual volumes. The VPD of the virtual volumes, which includes information such as the device identifiers and characteristics, is crucial for the ESXi host to recognize and mount the datastores and RDM LUNs2.
* Importance of VPD: The VPD is essential because it provides the ESXi host with the necessary information to differentiate between the virtual volumes and other storage devices. Without the VPD, the ESXi host may not be able to properly identify the encapsulated LUNs, leading to issues with datastore accessibility1.
* Best Practices: It is recommended to follow the best practices and required configurations for a vSphere Metro Storage Cluster using EMC VPLEX Storage array as outlined in VMware KB articles and Dell support documents. This ensures a smooth encapsulation process and proper functioning of the ESXi hosts with the VPLEX storage volumes1.
In summary, sharing the Virtual Volume VPD with the ESXi administrator is a critical step in ensuring that the ESXi cluster can successfully re-discover the datastore and the RDM LUNs after they have been encapsulated behind VPLEX.


NEW QUESTION # 63
When are the front-end ports enabled during a VPLEX installation?

  • A. Before creating the metadata volumes and backup
  • B. After exposing the storage to the hosts
  • C. Before launching the VPLEX EZ-Setup wizard
  • D. After creating the metadata volumes and backup

Answer: D

Explanation:
During a VPLEX installation, the front-end ports are enabled after the metadata volumes and backup have been created. This sequence ensures that the system's metadata, which is crucial for the operation of VPLEX, is secured before the storage is exposed to the hosts.
* Metadata Volumes Creation: The first step in the VPLEX installation process involves creating
* metadata volumes. These volumes store configuration and operational data necessary for VPLEX to manage the virtualized storage environment1.
* Metadata Backup: After the metadata volumes are created, it is essential to back up this data. The backup serves as a safeguard against data loss and is a critical step before enabling the front-end ports1.
* Enabling Front-End Ports: Once the metadata is secured, the front-end ports can be enabled. These ports are used for host connectivity, allowing hosts to access the virtual volumes presented by VPLEX1.
* Exposing Storage to Hosts: With the front-end ports enabled, the storage can then be exposed to the hosts. This step involves presenting the virtual volumes to the hosts through the front-end ports1.
* Final Configuration: The final configuration steps may include zoning, LUN masking, and setting up host access to the VPLEX virtual volumes. These steps are completed after the front-end ports are enabled and the storage is exposed1.
In summary, the front-end ports are enabled during a VPLEX installation after the metadata volumes and backup have been created, which is reflected in option D. This ensures that the system metadata is protected and available before the storage is made accessible to the hosts.


NEW QUESTION # 64
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