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EMC Dell VPLEX Deploy Achievement Sample Questions (Q40-Q45):
NEW QUESTION # 40
What is a best practice when connecting a VPLEX Cluster-1 to VPLEX Cluster-2?
Answer: D
Explanation:
When connecting a VPLEX Cluster-1 to VPLEX Cluster-2, the best practice is to ensure that every director port in Cluster-1 is zoned to every director port in Cluster-2 within each fabric. This approach is recommended to maintain a robust and resilient storage network that can handle failover scenarios and provide continuous availability.
* Zoning Directors: Zoning is a SAN best practice that isolates traffic within the fabric to specific devices. By zoning every director port from one cluster to every director port in the other cluster, you ensure that there are multiple paths for communication, which enhances redundancy and fault tolerance1.
* Fabric Configuration: Each fabric should be configured separately to maintain isolation between the paths. This prevents a single point of failure from affecting all paths and allows for continued operation even if one fabric experiences issues1.
* Path Redundancy: With every director port zoned to its counterpart in the other cluster, there are multiple paths for data to travel. This redundancy is crucial for VPLEX Metro's high availability, as it allows for seamless failover between clusters1.
* Continuous Availability: VPLEX is designed for continuous availability, and proper zoning is key to achieving this. The zoning configuration should support VPLEX's ability to provide uninterrupted access to data, even in the event of hardware failures or maintenance activities1.
* Best Practices Documentation: Dell EMC provides detailed documentation on VPLEX implementation and best practices, including zoning recommendations. It is important to consult these documents when planning and implementing zoning for VPLEX clusters1.
In summary, the best practice for connecting VPLEX Cluster-1 to Cluster-2 is to zone every director port to every director port in each fabric, ensuring multiple paths for communication and enhancing the overall resilience of the storage network.
NEW QUESTION # 41
Once installed, how does VPLEX Cluster Witness communicate with each cluster to provide the health check heartbeats required for monitoring?
Answer: D
Explanation:
The VPLEX Cluster Witness communicates with each cluster using a VPN Tunnel over IP to the management servers. This method is used to provide the health check heartbeats required for monitoring the status of the clusters.
* VPN Tunnel Creation: Initially, a VPN tunnel is established between the VPLEX Cluster Witness and each VPLEX cluster's management server. This secure tunnel ensures that the communication for health checks is protected1.
* Health Check Heartbeats: Through the VPN tunnel, the VPLEX Cluster Witness sends periodic health check heartbeats to each management server. These heartbeats are used to monitor the operational status of the clusters1.
* Monitoring Cluster Health: The health check heartbeats are essential for the VPLEX Cluster Witness to determine the health of each cluster. If a heartbeat is missed, it may indicate a potential issue with the cluster1.
* Failover Decisions: Based on the health check heartbeats, the VPLEX Cluster Witness can make informed decisions about failover actions if one of the clusters becomes unresponsive or encounters a failure1.
* Configuration and Management: The configuration and management of the VPN tunnels and the health check mechanism are typically done through the VPLEX management console or CLI, following the best practices outlined in the Dell VPLEX Deploy Achievement documents1.
In summary, the VPLEX Cluster Witness uses a VPN Tunnel over IP to communicate with each cluster's management server, providing the necessary health check heartbeats for continuous monitoring and ensuring high availability of the VPLEX system.
NEW QUESTION # 42
What is a consideration when using Advanced provisioning?
Answer: C
Explanation:
Advanced provisioning in Dell VPLEX systems allows for more granular control over storage volumes by enabling the division of storage volumes into multiple extents. This capability is particularly useful for optimizing storage utilization and performance.
* Division into Extents: Advanced provisioning allows administrators to divide a larger storage volume into smaller, more manageable extents. This can help in aligning storage allocation with application requirements and improving performance by distributing I/O loads1.
* Flexibility: By dividing storage volumes into extents, administrators have the flexibility to manage storage more efficiently, such as allocating different extents to different virtual volumes or applications as needed1.
* Efficient Storage Utilization: This approach can lead to more efficient utilization of storage resources, as extents can be allocated and de-allocated dynamically based on changing needs1.
* Provisioning Steps: While advanced provisioning offers this flexibility, it does not require each provisioning step to be executed simultaneously. Instead, it allows for a more tailored approach to storage management1.
* Third-Party Arrays: Advanced provisioning is not limited to storage volumes from third-party arrays; it can be used with storage volumes from a variety of sources, including those directly managed by VPLEX1.
In summary, the consideration when using Advanced provisioning in Dell VPLEX systems is that it allows the user to divide storage volumes into extents, providing greater flexibility and efficiency in storage management.
NEW QUESTION # 43
A storage administrator created a local RAID-0 virtual volume. However, the administrator decided to increase data protection by requiring a distributed virtual volume.
What is the recommended method to change the local volume to a distributed volume?
Answer: B
Explanation:
To increase data protection by converting a local RAID-0 virtual volume to a distributed virtual volume, the recommended method is to create a corresponding device on the remote cluster and then attach it as a mirror to the existing local device. This process effectively creates a distributed virtual volume that spans across both clusters.
* Create a Device on the Remote Cluster: Start by creating a new device on the remote VPLEX cluster.
This device should be of the same size as the local RAID-0 virtual volume and should not have a virtual volume associated with it1.
* Attach as a Mirror: Once the remote device is created, attach it as a mirror to the local RAID-0 virtual volume. This operation is performed using the VPLEX CLI and will begin the process of mirroring the data from the local device to the remote device1.
* Synchronization: After attaching the remote device as a mirror, the VPLEX system will synchronize the data between the local and remote devices. This ensures that both devices have identical data and are in a consistent state1.
* Distributed Virtual Volume: Once the synchronization is complete, the local and remote devices together form a distributed virtual volume. This volume now has increased data protection because it is distributed across two different clusters1.
* Verification: Verify that the distributed virtual volume is functioning correctly by checking its status and ensuring that it is accessible from both clusters1.
* Best Practices: It is important to follow the best practices for creating and managing distributed virtual volumes as outlined in the Dell VPLEX Deploy Achievement documents. This includes proper planning, execution, and verification of the mirroring process1.
In summary, the recommended method to change a local RAID-0 virtual volume to a distributed virtual volume is to create a corresponding device on the remote cluster and attach it as a mirror, thereby forming a distributed virtual volume with increased data protection.
NEW QUESTION # 44
Which performance statistics are collected as histograms and used to track latencies to display minimums and maximums?
Answer: D
Explanation:
In the context of performance monitoring, particularly for systems like Dell VPLEX, histograms are used to track latencies and display minimums, maximums, and other statistical data. The term "buckets" is often used to describe the segments within a histogram that categorize the latency data into ranges. Each bucket represents a range of latencies, and the number of events (or I/O operations) that fall into each latency range is counted and displayed1.
* Histograms in Monitoring: Histograms provide a visual representation of how data is distributed across different ranges of values, which is particularly useful for understanding the performance characteristics of a system like VPLEX1.
* Buckets Explained: Buckets within a histogram divide the entire range of collected data into discrete intervals. For latency tracking, these buckets might represent latency ranges such as 0-1 ms, 1-2 ms, etc1.
* Latency Tracking: By collecting latency data in buckets, administrators can quickly identify the distribution of latencies over time, pinpointing whether most I/O operations are fast, slow, or somewhere in between1.
* Minimums and Maximums: Histograms make it easy to see the minimum and maximum latencies experienced by the system, as well as the frequency of latencies within each bucket range1.
* Performance Analysis: This method of collecting and analyzing performance statistics is crucial for performance tuning and capacity planning, as it helps administrators understand the behavior of their storage systems under different workloads1.
In summary, "buckets" are the correct answer when referring to the segments within a histogram that are used to collect and categorize latency data for performance monitoring purposes in systems like Dell VPLEX.
NEW QUESTION # 45
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