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EMC Dell VPLEX Operate Achievement Sample Questions (Q14-Q19):

NEW QUESTION # 14
A company has deployed a VPLEX Metro protecting two applications without Cluster Witness:
. App1 distributed virtual volumes are added to CG1, which has detach-rule set cluster-1 as winner
. App2 distributed virtual volumes are added to CG2, which has detach-rule set cluster-2 as winner What should be the consequence if there is a WAN COM failure for an extended period?

A. I/O for CG1 is suspended at cluster -1; I/O is serviced at cluster-2I/O for CG2 is serviced at cluster -1; I/O is suspended at cluster-2
B. I/O for CG1 is serviced at cluster -1; I/O is suspended at cluster-2I/O is serviced for CG2 at cluster -2; I/O is suspended at cluster-1
C. I/O for CG1 is suspended at cluster -1; I/O is serviced at cluster-2I/O for CG2 is serviced at cluster -2; I/O is suspended at cluster-1
D. I/O for CG1 is detached at cluster -1; I/O is serviced at cluster-2I/O for CG2 is detached at cluster -2; I/O is serviced at cluster-1

Answer: A

Explanation:
In a VPLEX Metro environment without a Cluster Witness, the detach rules set for consistency groups (CGs) dictate the behavior during a WAN COM failure. Here's what happens:
* WAN COM Failure: A WAN COM failure means that the communication link between the two clusters in a VPLEX Metro has been lost.
* Detach Rules: Detach rules are predefined actions that determine which cluster will continue to service I/O for a distributed virtual volume in the event of a communication failure.
* CG1 and CG2: For App1, CG1 has a detach rule set with cluster-1 as the winner, meaning if there's a WAN COM failure, cluster-1 will continue to service I/O for CG1, and I/O will be suspended at cluster-2. Conversely, for App2, CG2 has a detach rule set with cluster-2 as the winner, so cluster-2 will continue to service I/O for CG2, and I/O will be suspended at cluster-1.
* Consequence of Extended WAN COM Failure: If the WAN COM failure is extended, the detach rules will be invoked, and each cluster will service the I/O for its respective application based on the set rules. This means that CG1 will be active on cluster-1 and suspended on cluster-2, and CG2 will be active on cluster-2 and suspended on cluster-1.
* No Cluster Witness: Without a Cluster Witness, which usually arbitrates which cluster should remain active in case of a split-brain scenario, the detach rules are critical for maintaining data integrity and availability.
By setting appropriate detach rules, the company ensures that each application remains operational on one of the clusters, even during an extended WAN COM failure, thus maintaining availability according to the predetermined failover strategy.

NEW QUESTION # 15
What are the two common use cases of the VPLEX Mobility feature?

A. Tech Refresh
Workload Rebalance
B. Workload Rebalance
Deduplication
C. Workflow Automation
Tech Refresh
D. NDU upgrades
Continuous Data Protection

Answer: A

Explanation:
The VPLEX Mobility feature is designed to address several use cases, but two of the most common ones are:
* Tech Refresh: This involves the migration of data from older storage arrays to newer ones without disrupting access to the data.VPLEX Mobility facilitates this process by allowing data to be moved seamlessly between different storage systems, which is essential during technology upgrades1.
* Workload Rebalance: This use case involves the dynamic movement of workloads across different storage systems to balance performance and capacity needs.VPLEX Mobility enables administrators to shift data to the most appropriate storage resources as demands change, ensuring optimal performance and utilization1.
References:
* VPLEX Mobility: The VPLEX Mobility feature is a key component of the VPLEX system, providing the ability to move data across different storage installations within the same data center, across a campus, or within a geographical region1.
* Tech Refresh: The technology refresh use case is particularly important for organizations that need to update their storage infrastructure without causing downtime or affecting ongoing operations.VPLEX Mobility allows for such updates to happen in the background, with no impact on users or applications1.
* Workload Rebalance: Workload rebalance is crucial for maintaining performance levels across storage systems, especially in environments where workloads can be unpredictable or where there are periodic spikes in demand.VPLEX Mobility's ability to move data dynamically helps in managing these scenarios effectively1.
For more detailed information on VPLEX Mobility and its use cases, you can refer to the official Dell documentation on VPLEX Overview and General Best Practices1.

NEW QUESTION # 16
A storage administrator has been tasked with encapsulating 100 LUNs across five Oracle servers from an existing array to a VPLEX Metro cluster. The administrator can obtain the same outage window for all five servers and wants to streamline as much of the encapsulation process as possible.
What can the administrator use to help achieve this task?

A. SolVe Desktop utility
B. storage-tool compose
C. Claim Storage Wizard
D. VIAS Provisioning Wizard

Answer: D

Explanation:
To streamline the encapsulation process of LUNs across multiple servers to a VPLEX Metro cluster, the storage administrator can use the VIAS (VPLEX Integrated Array Services) Provisioning Wizard. This tool simplifies the process by automating many of the steps involved in encapsulating LUNs.
Here's how the VIAS Provisioning Wizard can help:
* Preparation: The administrator can prepare many of the encapsulation tasks ahead of time, such as host zoning to VPLEX FE ports, host registration of initiators in VPLEX, and LUN masking/zoning to the VPLEX BE Ports1.
* Encapsulation Process: During the outage window, the administrator can use the VIAS Provisioning Wizard to encapsulate the LUNs under VPLEX control.Since the preparation steps like LUN masking and zoning to VPLEX BE have already been prepped, the cutover process becomes quicker1.
* Storage View Container Creation: The VIAS Provisioning Wizard allows for the creation of a Storage View container in VPLEX, where only the VPLEX FE ports are included initially1.
* EZ Provisioning Wizard: After claiming and encapsulating the LUNs, the administrator can create a
1:1 mapping of Storage volume to virtual volume with the EZ Provisioning Wizard, which is a quick process and helps preserve the data in its current state1.
* Finalizing the Cutover: The newly encapsulated 1:1 virtual volumes are added to the previously created Storage View container, and the previously registered host initiators are added to the Storage View as well1.
By using the VIAS Provisioning Wizard, the administrator can efficiently manage the encapsulation of a large number of LUNs, reducing the complexity and duration of the outage window required for such a task.

NEW QUESTION # 17
What condition would prevent volume expansion?

A. Metadata volume being backed up
B. Volume not belonging to a consistency group
C. Logging volume in re-synchronization state
D. Migration occurring on the volume

Answer: D

Explanation:
Volume expansion in Dell VPLEX is a process that allows for increasing the size of a virtual volume.
However, certain conditions can prevent this operation from taking place:
* Migration Occurring on the Volume: If there is an ongoing migration process involving the volume, it cannot be expanded until the migration is complete.This is because the volume's data layout is being altered during migration, and any attempt to change its size could lead to data corruption or other issues1.
* Consistency Group Membership: Whether or not a volume belongs to a consistency group does not directly prevent volume expansion. Consistency groups in VPLEX areused to ensure write-order fidelity across multiple volumes but do not restrict the expansion of individual volumes within the group.
* Metadata Volume Backup: Backing up a metadata volume is a separate operation that does not interfere with the ability to expand a storage volume. Metadata backups are typically performed to preserve the configuration and state information of the VPLEX system.
* Logging Volume Re-synchronization: While a logging volume in a re-synchronization state indicates that there is an ongoing process to align data across clusters or devices, it does not inherently prevent the expansion of a storage volume.
Therefore, the condition that would prevent volume expansion is when there is a migration occurring on the volume (OA).

NEW QUESTION # 18
Which mobility operation must be used to perform storage volume defragmentation?

A. Device mobility
B. Extent mobility
C. Data mobility
D. Virtual volume mobility

Answer: C

Explanation:
Data mobility in VPLEX is used for various operations, including storage volume defragmentation. Here's the explanation:
* Data Mobility: This operation is designed to move data within the VPLEX system, which can include moving data from fragmented storage volumes to contiguous storage, effectively defragmenting the storage1.
* Device Mobility: Device mobility is typically used for moving devices within the VPLEX cluster or across clusters but is not specifically for defragmentation purposes.
* Virtual Volume Mobility: While virtual volume mobility can move virtual volumes within the VPLEX environment, it does not directly address storage volume defragmentation.
* Extent Mobility: Extent mobility involves moving extents, which are segments of storage within a volume, but this is not the operation used specifically for defragmentation.
* Defragmentation Process: During defragmentation, data mobility would be used to relocate data from fragmented extents to a set of contiguous extents, thereby optimizing the layout of the data on the physical storage and improving performance1.
* VPLEX Administration Guides: For detailed procedures on how to perform data mobility operations, including defragmentation, administrators should refer to the VPLEX Administration Guides2.
By using data mobility operations, administrators can manage and optimize the storage within the VPLEX system, ensuring efficient use of resources and maintaining performance.

NEW QUESTION # 19
......

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