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EMC Dell VPLEX Operate Achievement Sample Questions (Q57-Q62):

NEW QUESTION # 57
What steps are performed during extent and device migration?

  • A. Start, commit, clean, and remove
  • B. Create, commit, clean, and terminate
  • C. Create, clean, commit, and remove
  • D. Start, commit, clean, and terminate

Answer: B

Explanation:
The process of extent and device migration in a Dell VPLEX environment typically involves the following steps:
* Create: The initial step is to create a migration job for the extent or device. This involves specifying the source and target extents or devices and setting up the migration parameters.
* Commit: Once the migration job is created, the next step is to commit the jB.This action will start the migration process, where data begins to move from the source to the target.
* Clean: After the data has been successfully migrated, the system performs a cleanup operation to remove any temporary data structures or logs that were used during the migration process.
* Terminate: The final step is to terminate the migration jB.This step concludes the migration process and releases any resources that were allocated for the migration.
References:
* The Dell VPLEX documentation provides detailed procedures on how to perform data migration, including the steps involved in migrating extents and devices1.
* Best practices and technical guides from Dell also cover the topic of data migration, offering insights into the process and how to ensure a smooth migration experience1.
By following these steps, a storage administrator can successfully migrate extents and devices within the VPLEX environment, ensuring data availability and minimal disruption to services.


NEW QUESTION # 58
Which mobility operation must be used to perform storage volume defragmentation?

  • A. Extent mobility
  • B. Device 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 # 59
What is the correct order of steps to migrate from an old array to a new one without disruption using VPLEX?

Answer:

Explanation:

Explanation:


The correct order of steps to migrate from an old array to a new one without disruption using VPLEX is:
* VPLEX discovers the new array and the admin creates migration target devices.
* VPLEX admin initiates mobility job(s).
* Once volumes on the new array are fully synchronized, the admin commits the migration.
* VPLEX admin monitors progress of the migration; I/O to host continues.
* Connect new storage array to VPLEX.
* Discovery and Creation: The initial step involves VPLEX identifying the presence of a new storage array within its environment. Following this discovery, a system administrator is responsible for setting up migration target devices on this newly recognized array.
* Initiation of Mobility Jobs: Subsequently, a system administrator must initiate mobility jobs through the VPLEX management interface, which facilitates data movement from the existing source storage to the target devices on the new array.
* Synchronization and Commitment: After initiating mobility jobs, data synchronization between source and target arrays begins automatically. Once synchronization reaches completion, indicating that both arrays have identical data sets, an administrator must commit to finalizing this stage of migration.
* Monitoring Migration Progress: Throughout this process, it's crucial for an administrator to monitor ongoing operations ensuring that input/output operations continue uninterrupted for hosts accessing data during transition phases.
* Connecting New Array: The final step involves integrating the newly populated storage array into production by connecting it with VPLEX systems thus completing migration.


NEW QUESTION # 60
When using VPLEX Metro, what is the supported round trip time between clusters?

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

Answer: A

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 # 61
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 # 62
......

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