EMC D-VPX-OE-A-24 ACTUAL TEST | RELIABLE D-VPX-OE-A-24 MOCK TEST

EMC D-VPX-OE-A-24 Actual Test | Reliable D-VPX-OE-A-24 Mock Test

EMC D-VPX-OE-A-24 Actual Test | Reliable D-VPX-OE-A-24 Mock Test

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EMC Dell VPLEX Operate Achievement Sample Questions (Q39-Q44):

NEW QUESTION # 39
At which layer of the director IO stack are local and distributed mirroring managed?

  • A. Coherent Cache
  • B. Device Virtualization
  • C. Storage View
  • D. Storage Volume

Answer: B

Explanation:
Local and distributed mirroring in a VPLEX environment are managed at the device virtualization layer of the director IO stack. Here's the explanation:
* Device Virtualization Layer: This layer is responsible for the creation and management of virtualized storage devices in VPLEX. It abstracts the physical storage and presents it as virtual volumes that can be accessed by hosts.
* Mirroring Management: Both local and distributed mirroring are configured at the device level.Local mirroring involves creating RAID-1 devices within the same VPLEX cluster, while distributed mirroring involves creating distributed devices across two VPLEX clusters12.
* Coherent Cache: The coherent cache layer is involved in maintaining cache coherency across the VPLEX clusters but does not manage the mirroring of devices.
* Storage View: The storage view layer is where hosts are mapped to virtual volumes. It does not manage the mirroring of devices but rather the access to them.
* Storage Volume: The storage volume layer represents the physical storage volumes from backend arrays before they are virtualized by VPLEX. It is not the layer where mirroring is managed.
By managing mirroring at the device virtualization layer, VPLEX ensures that data is protected and available across multiple storage systems, providing high availability and disaster recovery capabilities.


NEW QUESTION # 40
When using VPLEX Metro, what is the supported round trip time between clusters?

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

Answer: C

Explanation:
When using VPLEX Metro, the supported round trip time (RTT) between clusters is 5 milliseconds (ms). This is the maximum latency that is supported to ensure proper synchronization and performance of the VPLEX Metro system.
* VPLEX Metro: VPLEX Metro is a storage virtualization solution that allows for the creation of distributed virtual volumes across two geographically separated clusters1.
* Round Trip Time (RTT): RTT is the time it takes for a signal to travel from one cluster to another and back again.It is a critical factor in the performance of distributed systems like VPLEX Metro1.
* 5 ms Limitation: The 5 ms RTT limitation is set to ensure that the clusters can maintain synchronization without significant performance degradation.Latencies higher than this can lead to issues with data consistency and application performance1.
* Network Considerations: When planning a VPLEX Metro deployment, it is important to consider the network infrastructure and ensure that the RTT between clusters does not exceed the 5 ms threshold1.
* Performance Impact: Adhering to the 5 ms RTT is crucial for maintaining the high availability and data mobility features of VPLEX Metro, as it affects the ability to perform real-time data mirroring and failover between clusters1.
By ensuring that the RTT between VPLEX Metro clusters does not exceed 5 ms, organizations can achieve the desired level of performance and reliability from their VPLEX Metro deployment.


NEW QUESTION # 41
What is a key VPLEX component that enables an active-active data center?

  • A. Distributed virtual volumes
  • B. Distributed storage volumes
  • C. Distributed storage views
  • D. Distributed extents

Answer: A

Explanation:
Distributed virtual volumes are a key component of Dell VPLEX that enable active-active data center configurations. Here's how they contribute to this capability:
* Active-Active Data Centers: In an active-active data center setup, both data centers are actively running workloads and can take over for each other in case of a failure.This configuration requires a storage solution that can provide simultaneous access to the same data from multiple locations1.
* Distributed Virtual Volumes: VPLEX creates distributed virtual volumes that span across two geographically separated clusters.These volumes can be accessed and written to simultaneously from both locations, which is essential for maintaining operations in an active-active environment1.
* Cache Coherence: VPLEX uses a cache coherence algorithm to ensure that write operations are synchronized across both sites.This means that when data is written to a distributed virtual volume, it is updated in both locations at the same time, ensuring consistency1.
* Application Support: Distributed virtual volumes support mission-critical applications that require high availability and continuous operations, such as Oracle RAC, by allowing them to operate in an active-active manner across data centers1.
* VPLEX Metro: The VPLEX Metro product supports active-active data centers by allowing applications to simultaneously read and write on both sites, which increases resource utilization and provides infrastructure that is actively used rather than remaining idle2.
By leveraging distributed virtual volumes, VPLEX enables organizations to create highly available, geographically distributed virtual data centers that support continuous data access and mobility.


NEW QUESTION # 42
What is a characteristic of global commands in the VPlexcli?

  • A. Accessible from all contexts
  • B. Run exclusively from the root context
  • C. Control tasks running on all directors
  • D. Executable from any director

Answer: A

Explanation:
Global commands in the VPLEX CLI (Command Line Interface) are characterized by their accessibility from all contexts within the CLI. This means that these commands can be executed regardless of the current navigation level or context in the CLI structure.
* Global Commands: Global commands are designed to provide convenience and efficiency by allowing administrators to execute certain operations without the need to navigate to a specific context within the CLI1.
* CLI Context Tree: The VPLEX CLI is organized into a hierarchical context tree, where commands are typically executed within a specific context that corresponds to the area of the system being managed1.
* Accessibility: Unlike other commands that must be executed from the appropriate location in the context tree, global commands can be accessed and run from any point within the CLI.This makes them readily available for common tasks that need to be performed frequently or quickly1.
* Examples: Examples of global commands might include those used for system-wide status checks, performance monitoring, or initiating tasks that affect multiple components of the VPLEX system.
* Efficiency: The ability to execute global commands from any context streamlines the management process, as it reduces the number of steps required to perform certain tasks and allows for quicker response to system events or requirements1.
By being accessible from all contexts, global commands in the VPLEX CLI provide a flexible and efficient way for administrators to manage and monitor the VPLEX system.


NEW QUESTION # 43
What is a consideration for using a VPLEX logging volume?

  • A. VIAS can be used to create a logging volume at each cluster
  • B. Automatically provisioned at each VPLEX cluster when the distributed device is created
  • C. A distributed device must be created before a logging volume can be created
  • D. Must be created on each VPLEX cluster before creating a distributed device

Answer: D

Explanation:
When considering the use of a VPLEX logging volume, it is important to note that a logging volume must be created on each VPLEX cluster before creating a distributed device. This is because logging volumes play a critical role in the VPLEX architecture by capturing write logs that are essential for data consistency and recovery processes.
* Role of Logging Volumes: Logging volumes in VPLEX are used to store write logs that ensure data consistency across clusters, especially in distributed device configurations1.
* Creation Before Distributed Devices: Before a distributed device can be created, which spans across clusters for high availability, logging volumes must exist on each cluster to handle the write logging required for the distributed device1.
* VIAS and Automatic Provisioning: While VIAS (VPLEX Integrated Array Services) is a tool that simplifies storage provisioning tasks, and automatic provisioning can occur in certain scenarios, the creation of logging volumes is a prerequisite step that typically requires explicit action by the administrator before distributed devices are set up1.
* Sequence of Operations: The sequence of operations is such that logging volumes are created first, providing the necessary infrastructure for capturing write logs, followed by the creation of distributed devices that will utilize these logging volumes1.
By ensuring that logging volumes are created on each VPLEX cluster prior to the creation of distributed devices, administrators can maintain the integrity and high availability of data within the VPLEX environment.


NEW QUESTION # 44
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