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EMC Dell VPLEX Deploy Achievement Sample Questions (Q60-Q65):

NEW QUESTION # 60
During VPLEX installation, four 78 GB metadata volumes have to be assigned to the VPLEX back-end ports.
How are these volumes used?

A. Two are mirrored and used as the meta-volume.
Two are used in an alternating fashion as meta-volume backups.
B. Two are mirrored and used as the meta-volume.
Two are also mirrored and used as the meta-volume daily backup.
C. One is used as the meta-volume.
One is used as the meta-volume backup
Two are used as logging volumes when the clusters lose connectivity.
D. One is used as the meta-volume.
Three are used in an alternating fashion as meta-volume backups.

Answer: A

Explanation:
During the VPLEX installation, metadata volumes play a critical role in the system's operation. Here's how the four 78 GB metadata volumes are utilized:
* Meta-Volume Configuration: Two of the metadata volumes are mirrored to create the active meta-volume. This mirroring provides redundancy, ensuring that metadata, which is essential for the operation of VPLEX, is protected against single points of failure1.
* Backup Meta-Volumes: The other two metadata volumes are used as backups for the meta-volume.
They are used in an alternating fashion, which means that they can be rotated to maintain a fresh and consistent backup of the meta-volume1.
* Importance of Metadata: The metadata in VPLEX contains information about the virtual volumes, mappings, and other configuration details that are crucial for the system's virtualization capabilities1.
* System Resilience: By having mirrored meta-volumes and alternating backup volumes, VPLEX ensures high availability and resilience, which is critical for maintaining continuous operations and data integrity1.
* Operational Continuity: In the event of a failure or corruption of the active meta-volume, VPLEX can quickly switch to one of the backup volumes, minimizing downtime and maintaining operational continuity1.
In summary, the four 78 GB metadata volumes assigned to the VPLEX back-end ports during installation are used to create a mirrored meta-volume and provide alternating backups, ensuring system resilience and data integrity.

NEW QUESTION # 61
Which consistency group configuration option must be set to ensure that a consistency group will continue synchronization without manual intervention once the link is restored after a link outage?

A. rule-set-name = cluster-1-detaches
B. auto-resume = true
C. rebuild-type = full
D. rebuild-allowed = true

Answer: B

Explanation:
To ensure that a consistency group will continue synchronization without manual intervention once the link is restored after a link outage, the configuration option that must be set is auto-resume = true.
* Consistency Group Configuration: A consistency group in Dell VPLEX is a collection of virtual volumes that are managed together to maintain write-order fidelity. This is crucial for applications that require all writes across multiple volumes to be consistent with each other1.
* Link Outage Handling: In the event of a link outage, it is important for the consistency group to be able to automatically resume synchronization once the link is restored. This minimizes the manual intervention required and ensures data integrity is maintained1.
* Auto-resume Option: The auto-resume = true setting is used to configure the consistency group to automatically resume synchronization. This setting is part of the consistency group's attributes and can be configured via the VPLEX CLI or Unisphere for VPLEX1.
* Implementation: To set this option, the administrator would use the VPLEX CLI to navigate to the consistency group settings and modify the auto-resume attribute to true. This ensures that the consistency group will automatically attempt to resume synchronization after a link outage is resolved1.
* Best Practices: It is recommended to enable auto-resume for all consistency groups that require high availability and automatic recovery from link outages. This setting is part of the best practices for VPLEX consistency groups as outlined in the Dell VPLEX Deploy Achievement documents1.
In summary, the auto-resume = true configuration option is essential for ensuring that a VPLEX consistency group will continue synchronization without manual intervention after a link outage, thereby maintaining the high availability and data protection standards set by Dell VPLEX Deploy Achievement guidelines.

NEW QUESTION # 62
How much cache is available in a VPLEX VS2 dual engine setup?

A. 288 GB
B. 72 GB
C. 144 GB
D. 128 GB

Answer: A

Explanation:
In a VPLEX VS2 dual engine setup, each engine is fixed at 72GB of cache, with 36GB per director. Since a dual engine setup contains two engines, the total available cache would be:
72 GB (per engine) imes 2 (engines) = 144 GB72 GB (per engine)×2 (engines)=144 GB However, as each engine contains two directors, and each director has 36GB of cache, the total cache available in a dual engine setup would be:
36 GB (per director) imes 4 (directors) = 144 GB36 GB (per director)×4 (directors)=144 GB Therefore, the total cache available in a VPLEX VS2 dual engine setup is 144 GB1.

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

A. Before launching the VPLEX EZ-Setup wizard
B. After exposing the storage to the hosts
C. Before creating the metadata volumes and backup
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
What is an EMC best practice for connecting VPLEX to back-end arrays?

A. Each VPLEX director should have four active paths to every back-end array storage volume
B. One multiple switch fabric should be used for each VPLEX engine
C. Two active paths per VPLEX engine to any storage volume is optimal
D. Back-end connections should be distributed across one director

Answer: A

Explanation:
EMC recommends specific best practices for connecting VPLEX to back-end storage arrays to ensure high availability and optimal performance. One of these best practices is that each VPLEX director should have four active paths to every back-end array storage volume.
* Multiple Paths: Having multiple active paths from each VPLEX director to the storage volumes ensures that there is no single point of failure. If one path fails, the other paths can continue to provide connectivity1.
* Load Balancing: Multiple paths also allow for load balancing of I/O operations across the different paths, which can improve performance and reduce the risk of bottlenecks1.
* Path Redundancy: Path redundancy is crucial for maintaining continuous availability, especially in environments where the VPLEX is used for mission-critical applications1.
* Configuration: The configuration of the paths should be done in accordance with EMC's best practices, which include proper zoning and masking in the SAN environment1.
* Documentation: Detailed guidelines and best practices for VPLEX SAN connectivity, including back-end array connections, are available in EMC's documentation, which provides comprehensive instructions for setting up and managing these connections1.
In summary, EMC's best practice for connecting VPLEX to back-end arrays is to ensure that each VPLEX director has four active paths to every back-end array storage volume. This setup provides the necessary redundancy and performance for a robust and reliable storage environment.

NEW QUESTION # 65
......

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