D-VPX-OE-A-24 Dell VPLEX Operate Achievement Practice Questions
Prepare for D-VPX-OE-A-24 with more than an answer.
- Level
- Achievement
- Valid for
- Achievement credentials typically do not expire
Domains covered on the exam 4
- VPLEX Concepts25%
- VPLEX Storage Provisioning35%
- Volume Management and Protection25%
- VPLEX Monitoring15%
- 1
A VPLEX administrator needs to configure proactive hardware fault monitoring and automatic service request creation with Dell Support. Which VPLEX component or service must be configured to enable this functionality?
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Correct answer: C
EMC Secure Remote Support (ESRS) is the service responsible for the 'call home' functionality. By configuring the VPLEX management server to communicate with an ESRS Gateway, the system can automatically send alerts, logs, and system reports to Dell Support upon detecting a hardware fault or critical event. This enables proactive monitoring and automated service request creation.
- 2
True or False: A single VPLEX engine consists of two directors, and each director has both front-end (host-facing) and back-end (array-facing) ports.
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Correct answer: A
This statement is true. The fundamental building block of a VPLEX cluster is the engine. Each engine contains two redundant directors for high availability. Each of these directors is equipped with I/O modules that provide both front-end Fibre Channel ports for host connectivity and back-end Fibre Channel ports for connecting to the underlying storage arrays.
- 3
What is the primary role of GeoSynchrony in the VPLEX software architecture?
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Correct answer: B
GeoSynchrony is the core software of VPLEX. It is a proprietary, real-time operating system that runs on each director. It is responsible for all key VPLEX functions, including I/O processing, distributed data caching, metadata management, cache coherence between directors and clusters, and presenting virtual volumes to hosts.
- 4
A storage administrator is configuring a three-site disaster recovery solution using VPLEX Metro and RecoverPoint. The goal is to have synchronous replication between Site A and Site B, and asynchronous replication from the combined sites to Site C. What is this topology called?
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Correct answer: C
MetroPoint is the specific Dell EMC term for the architecture that combines VPLEX Metro for high availability and synchronous replication between two sites with RecoverPoint for continuous data protection (CDP) and asynchronous replication to a third, remote site. This provides both local/metro-area HA and long-distance DR.
- 5
During a data migration using VPLEX device mobility, the job fails with an error indicating the target device is too small. The administrator confirms that the target LUN from the array is the same size as the source LUN. What is the most likely cause of this error?
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Correct answer: B
When VPLEX claims a storage volume, it reserves a small portion of that volume (typically around 128MB) for its own metadata. This means the usable capacity of a claimed LUN is slightly smaller than its raw capacity. For a device mobility job, the target LUN's usable capacity must be greater than or equal to the source's usable capacity. If both raw LUNs are exactly the same size, the target will not have enough space, as the migration needs to copy the source data plus the source metadata overhead. The best practice is to make the target LUN slightly larger than the source.
- 6
A manufacturing company uses a VPLEX Local cluster. They have a requirement to ensure that a group of three virtual volumes, used by a single application, are always consistent relative to each other for snapshot and replication purposes. Which VPLEX object should be used to group these volumes together?
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Correct answer: C
A Consistency Group (CG) is a logical container for virtual volumes that must be managed as a single entity to maintain application consistency. When operations like creating snapshots, initiating replication with RecoverPoint, or managing distributed devices are performed on a CG, VPLEX ensures the action is applied to all member volumes at the exact same point in time. This is critical for applications that stripe data across multiple LUNs, such as databases.
- 7
A financial institution is implementing a MetroPoint solution. They need to understand the data flow to ensure compliance with data sovereignty regulations. Which statement accurately describes the write I/O path in a MetroPoint topology?
sequenceDiagram participant Host participant VPLEX_A as VPLEX Site A participant VPLEX_B as VPLEX Site B participant RP_C as RecoverPoint Site C Host->>VPLEX_A: Write I/O VPLEX_A->>VPLEX_B: Sync Write to Cache VPLEX_B-->>VPLEX_A: Acknowledge Cache Write VPLEX_A-->>Host: Acknowledge I/O VPLEX_A->>RP_C: Async Replicate VPLEX_B->>RP_C: Async ReplicateShow answer details
Correct answer: B
The MetroPoint architecture combines two replication methods. The VPLEX Metro portion ensures that writes are synchronously committed to the cache of both metro clusters (Site A and Site B) before acknowledging the write to the host, providing zero RPO for the metro distance. The RecoverPoint portion then captures these writes from the VPLEX splitter and replicates them asynchronously to the third, remote site (Site C), providing disaster recovery with a near-zero RPO.
- 8
A financial services firm is experiencing intermittent high latency on a critical database application hosted on a VPLEX Metro cluster. An administrator has created a performance monitor for the associated distributed virtual volume. The initial analysis of the monitor's output shows high back-end read latency, but front-end latency remains within acceptable limits. The WAN link between the two sites shows no signs of congestion. Which component is the most likely source of the performance bottleneck?
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Correct answer: B
The scenario explicitly states that back-end read latency is high while front-end latency is acceptable. Back-end components in a VPLEX architecture are the storage arrays providing the physical LUNs. High back-end latency points directly to a performance issue on the storage array itself, such as slow disk response, cache contention, or overloaded storage processors. The VPLEX directors are merely passing the slow response from the array to the host.
- 9
A storage administrator is tasked with setting up a new VPLEX VS6 Metro cluster. For security compliance, all management and monitoring traffic must be encrypted and authenticated. Which actions are required to configure SNMP monitoring according to this policy? (Select TWO)
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Correct answer: B, C
SNMPv3 is required to meet the security policy of encryption and authentication. This involves creating a user with specific credentials and selecting protocols for authentication (e.g., SHA) and privacy/encryption (e.g., AES).
Regardless of the SNMP version, the SNMP agent service must be enabled on the VPLEX management server to allow it to respond to queries and send traps to the network management station.
- 10
During the provisioning of a new distributed device in a VPLEX Metro environment, an administrator needs to ensure that if one cluster loses connectivity to the other, its virtual volumes will continue I/O operations. Which consistency group rule set should be configured to achieve this outcome?
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Correct answer: D
The
detach-rule-local-com-criticalrule set is designed for scenarios where local I/O availability is prioritized over remote data consistency in the event of an inter-cluster link failure. This rule allows the local cluster to detach and continue serving I/O from its local leg, ensuring application uptime at that site. The other options either pre-determine a winner or require manual intervention, which doesn't meet the requirement.
