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NEW QUESTION # 39
What is the purpose of issuing the batch-migrate check-plan command?
Answer: D
Explanation:
The batch-migrate check-plan command in Dell VPLEX is used to verify that the target devices specified in a migration plan have no virtual volumes configured. This is a crucial step before initiating a batch migration to ensure that the target devices are ready to receive data from the source devices.
* Pre-Migration Verification: Before starting a batch migration, it is important to ensure that the target devices are properly prepared. This includes verifying that they are not already in use by another virtual volume1.
* Ensuring Data Integrity: By checking that no virtual volumes are configured on the target devices, the command helps prevent data corruption or overwriting of existing data1.
* Migration Plan: The migration plan contains details about the source and target devices for the
* migration. The check-plan command reviews this plan to confirm that the target devices meet the necessary criteria for migration1.
* Command Execution: The command is executed in the VPLEX CLI, and the output will indicate whether the target devices are ready for migration or if there are any issues that need to be resolved1.
* Post-Verification Actions: If the command finds that virtual volumes are configured on the target devices, the administrator must take appropriate actions to remove these configurations before proceeding with the migration1.
In summary, the purpose of issuing the batch-migrate check-plan command is to verify that the target devices specified in a migration plan have no virtual volumes configured, ensuring that they are ready for the data migration process.
NEW QUESTION # 40
Which command is used to display available statistics for monitoring VPLEX?
Answer: D
Explanation:
The command used to display available statistics for monitoring VPLEX is monitor stat-list. This command provides a list of all the statistics that can be monitored on the VPLEX system.
* Command Usage: The monitor stat-list command is executed in the VPLEX CLI (Command Line Interface). When run, it will display a list of all the statistics that are available for monitoring1.
* Monitoring Statistics: The statistics available for monitoring can include various performance metrics such as IOPS (Input/Output Operations Per Second), throughput, and latency. These metrics are crucial for assessing the health and performance of the VPLEX system1.
* Custom Monitors: In addition to the default system monitors, custom monitors can be created to track specific data. The monitor stat-list command helps in identifying which statistics can be included in these custom monitors1.
* Performance Analysis: By using the monitor stat-list command, administrators can determine which statistics are relevant for their performance analysis and can then create monitors to track those specific metrics1.
* Documentation Reference: For more information on the usage of the monitor stat-list command and other monitoring commands, administrators should refer to the VPLEX CLI and Administration Guides for the code level the VPLEX is running1.
In summary, the monitor stat-list command is used to display the available statistics for monitoring VPLEX, providing administrators with the information needed to set up and manage performance monitoring on the system.
NEW QUESTION # 41
A company has 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 cluster-2 fails for an extended period?
Answer: B
Explanation:
In a VPLEX Metro environment without a Cluster Witness, consistency groups (CGs) are used to manage distributed virtual volumes with detach rules that determine the behavior during a cluster failure.
* CG1 with Cluster-1 as Winner: For App1, the distributed virtual volumes are added to CG1, which has a detach rule set with cluster-1 as the winner. This means that if cluster-2 fails, I/O for CG1 will continue to be serviced at cluster-1 after it automatically attaches the volumes that were distributed across both clusters1.
* CG2 with Cluster-2 as Winner: For App2, the distributed virtual volumes are added to CG2, which has a detach rule set with cluster-2 as the winner. In the event of a cluster-2 failure, I/O for CG2 will be serviced after the volumes are detached from cluster-2, allowing cluster-1 to take over and service the I/O1.
* Extended Cluster-2 Failure: If cluster-2 fails for an extended period, the VPLEX Metro will follow the detach rules set for each consistency group. CG1 will have its I/O serviced at cluster-1, and CG2 will also have its I/O serviced at cluster-1 after detaching from the failed cluster-21.
* No Cluster Witness: Without a Cluster Witness, the VPLEX Metro relies on the detach rules defined in the consistency groups to determine how to handle I/O in the event of a cluster failure1.
* Operational Continuity: The goal is to maintain operational continuity for both applications. By servicing I/O for both CG1 and CG2 at cluster-1, VPLEX ensures that both applications remain operational despite the failure of cluster-21.
In summary, if cluster-2 fails for an extended period in a VPLEX Metro setup without a Cluster Witness, I/O for CG1 will be serviced at cluster-1, and I/O for CG2 will also be serviced at cluster-1 after detaching from cluster-2, as per the detach rules set for each consistency group.
NEW QUESTION # 42
During VPLEX installation, four 78 GB metadata volumes have to be assigned to the VPLEX back-end ports.
How are these volumes used?
Answer: A
Explanation:
During the VPLEX installation, metadata volumes play a critical role in the system's operation. Here's how the four 78 GB metadata volumes are utilized:
* Meta-Volume Configuration: Two of the metadata volumes are mirrored to create the active meta-volume. This mirroring provides redundancy, ensuring that metadata, which is essential for the operation of VPLEX, is protected against single points of failure1.
* Backup Meta-Volumes: The other two metadata volumes are used as backups for the meta-volume.
They are used in an alternating fashion, which means that they can be rotated to maintain a fresh and consistent backup of the meta-volume1.
* Importance of Metadata: The metadata in VPLEX contains information about the virtual volumes, mappings, and other configuration details that are crucial for the system's virtualization capabilities1.
* System Resilience: By having mirrored meta-volumes and alternating backup volumes, VPLEX ensures high availability and resilience, which is critical for maintaining continuous operations and data integrity1.
* Operational Continuity: In the event of a failure or corruption of the active meta-volume, VPLEX can quickly switch to one of the backup volumes, minimizing downtime and maintaining operational continuity1.
In summary, the four 78 GB metadata volumes assigned to the VPLEX back-end ports during installation are used to create a mirrored meta-volume and provide alternating backups, ensuring system resilience and data integrity.
NEW QUESTION # 43
How much cache is available in a VPLEX VS2 dual engine setup?
Answer: C
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) imes 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) imes 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 # 44
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