D-VPX-DY-A-24 Visual Cert Exam | D-VPX-DY-A-24 Valid Test Objectives

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EMC Dell VPLEX Deploy Achievement Sample Questions (Q24-Q29):

NEW QUESTION # 24
Which type of statistics is used to track latencies, determine median, mode, percentiles, minimums, and maximums?

A. Counters
B. Readings
C. Monitors
D. Buckets

Answer: D

Explanation:
In the context of performance monitoring, particularly for systems like Dell VPLEX, histograms are used to track latencies and display statistical data such as median, mode, percentiles, minimums, and maximums. The term "buckets" is often used to describe the segments within a histogram that categorize the latency data into ranges. Each bucket represents a range of latencies, and the number of events (or I/O operations) that fall into each latency range is counted and displayed.
* Histograms in Monitoring: Histograms provide a visual representation of how data is distributed across different ranges of values, which is particularly useful for understanding the performance characteristics of a system like VPLEX.
* Buckets Explained: Buckets within a histogram divide the entire range of collected data into discrete intervals. For latency tracking, these buckets might represent latency ranges such as 0-1 ms, 1-2 ms, etc.
* Latency Tracking: By collecting latency data in buckets, administrators can quickly identify the distribution of latencies over time, pinpointing whether most I/O operations are fast, slow, or somewhere in between.
* Minimums and Maximums: Histograms make it easy to see the minimum and maximum latencies experienced by the system, as well as the frequency of latencies within each bucket range.
* Performance Analysis: This method of collecting and analyzing performance statistics is crucial for performance tuning and capacity planning, as it helps administrators understand the behavior of their storage systems under different workloads.
In summary, "buckets" are the correct answer when referring to the segments within a histogram that are used to collect and categorize latency data for performance monitoring purposes in systems like Dell VPLEX.

NEW QUESTION # 25
How much cache is available in a VPLEX VS2 dual engine setup?

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

Answer: D

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) times 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) times 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 # 26
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. auto-resume = true
B. rule-set-name = cluster-1-detaches
C. rebuild-allowed = true
D. rebuild-type = full

Answer: A

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 # 27
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. VML ID
C. Virtual volume VPD
D. UUID of back-end LUN

Answer: C

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 # 28
How many copies can RecoverPoint maintain in a MetroPoint topology?

A. 0
B. 1
C. 2
D. 3

Answer: C

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 # 29
......

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D-VPX-DY-A-24 Visual Cert Exam | D-VPX-DY-A-24 Valid Test Objectives

EMC D-VPX-DY-A-24 Valid Test Objectives, Valid D-VPX-DY-A-24 Test Review

EMC Dell VPLEX Deploy Achievement Sample Questions (Q24-Q29):

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