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EMC Dell VPLEX Operate Achievement Sample Questions (Q36-Q41):

NEW QUESTION # 36
Which type of VPLEX statistic provides an instantaneous value that displays CPU utilization and memory utilization?

A. Readings
B. Buckets
C. Counters
D. Journal Lag

Answer: C

Explanation:
Questions no:Q29
In VPLEX, the type of statistic that provides an instantaneous value displaying CPU utilization and memory utilization is referred to as "counters." These counters offer real-time metrics that reflect the current state of the system's resources.
* Counters: Counters are a type of statistic in VPLEX that provide immediate, real-time values for various system metrics, including CPU and memory utilization.They are used to monitor the current performance and resource usage of the VPLEX system1.
* CPU Utilization: CPU utilization counters show the percentage of CPU resources currently being used by the VPLEX directors.This information is crucial for understanding the load on the system and for capacity planning1.
* Memory Utilization: Memory utilization counters display the amount of RAM currently in use by the VPLEX system.This helps administrators monitor memory consumption and ensure that the system has enough memory to operate efficiently1.
* Monitoring and Management: Counters are an essential tool for the ongoing monitoring and management of a VPLEX environment.They help administrators identify potential performance bottlenecks and take proactive measures to optimize system performance1.
* Instantaneous Values: Unlike other statistics that may provide averages or aggregated data over a period, counters offer instantaneous snapshots of resource usage, making them ideal for real-time monitoring1.
By utilizing counters, VPLEX administrators can gain immediate insights into the system's CPU and memory utilization, enabling them to maintain optimal performance and address issues as they arise.

NEW QUESTION # 37
Why is it EMC best practice that each back-end LUN has a connection to all the A-directors and to all the B-directors in the VPLEX cluster?

A. Optimizes global read cache
B. Reduces the number of ITLs
C. Ensures writes are mirrored on director local cache
D. Prevents data unavailability during a non-disruptive upgrade

Answer: D

Explanation:
It is EMC best practice to ensure that each back-end LUN has a connection to all the A-directors and to all the B-directors in the VPLEX cluster to prevent data unavailability during a non-disruptive upgrade. Here's why:
* Non-Disruptive Upgrades: VPLEX allows for non-disruptive upgrades, meaning that system updates and maintenance can occur without impacting data availability or application performance1.
* Director Connectivity: By connecting each back-end LUN to all A-directors and B-directors, VPLEX ensures that there are multiple paths for data access.If one director is being upgraded or is offline, the other directors can continue to provide access to the LUNs1.
* High Availability: This connectivity model supports VPLEX's high availability architecture, allowing for continuous operations even during maintenance activities1.
* Redundancy: The practice of connecting LUNs to all directors provides redundancy, ensuring that there is no single point of failure that could lead to data unavailability1.
* Best Practice: EMC recommends this approach as a best practice to maximize the uptime and resilience of the storage environment, which is critical for mission-critical applications that require constant data access1.
By following this best practice, organizations can leverage VPLEX's capabilities to maintain data availability and ensure business continuity, even when system upgrades or director maintenance is required.

NEW QUESTION # 38
What is a supported geometry for a VPLEX device?

A. 2-1 mapping
B. RAID-C
C. JBOD
D. RAID-5

Answer: B

Explanation:
A supported geometry for a VPLEX device is RAID-C, which stands for RAID Concatenation. RAID-C is a VPLEX-specific RAID configuration that concatenates multiple extents or devices to create a larger virtual volume.
* RAID Concatenation (RAID-C): RAID-C is a VPLEX geometry that allows for the concatenation of multiple storage extents or devices.This configuration is used to create larger virtual volumes by combining smaller ones1.
* Use of RAID-C: RAID-C is typically used when there is a need to expand storage capacity without the requirement for additional redundancy.It is a simple way to increase the size of a virtual volume by adding more storage to it1.
* Advantages: The advantage of using RAID-C is that it allows for flexibility in storage provisioning and can be easily expanded as storage needs grow.It also enables the use of storage from different arrays1.
* VPLEX Device Configuration: In the context of VPLEX, a device refers to a logical unit that can be presented to hosts.By using RAID-C geometry, VPLEX can present larger logical units that span across multiple physical storage arrays1.
* Supported Geometries: VPLEX supports various RAID geometries, including RAID-0, RAID-1, and RAID-C, each serving different purposes and providing different levels of performance and protection1.
By utilizing RAID-C geometry, VPLEX administrators can manage storage more effectively, ensuring that they can meet the capacity requirements of their applications and services.

NEW QUESTION # 39
VPLEX Metro has been added to an existing HP OpenView network monitoring environment. The VPLEX SNMP agent and other integration information have been added to assist in the implementation. After VPLEX is added to SNMP monitoring, only the remote VPLEX cluster is reporting performance statistics.
What is the cause of this issue?

A. Local VPLEX Witness has a misconfigured SNMP agent.
B. Local VPLEX cluster management server has a misconfigured SNMP agent.
C. HP OpenView is running SNMP version 2C, which may cause reporting that does not contain the performance statistics.
D. TCP Port 443 is blocked at the local site's firewall.

Answer: B

Explanation:
When only the remote VPLEX cluster is reporting performance statistics in an HP OpenView network monitoring environment, the cause is likely due to a misconfiguration of the SNMP agent on the local VPLEX cluster management server. Here's a detailed explanation:
* SNMP Agent Role: The SNMP (Simple Network Management Protocol) agent is responsible for collecting and sending performance statistics from the VPLEX cluster to the monitoring system1.
* Misconfiguration Symptoms: If the SNMP agent is misconfigured on the local VPLEX cluster management server, it may fail to collect or send the correct performance data, resulting in missing statistics in the monitoring system1.
* Troubleshooting Steps: To resolve this issue, the VPLEX administrator should verify the SNMP configuration on the local VPLEX cluster management server.This includes checking the community strings, SNMP version, and target IP addresses for the monitoring system1.
* Correct Configuration: Ensuring that the SNMP agent is correctly configured on the local VPLEX cluster management server will allow it to report performance statistics accurately to the HP OpenView network monitoring environment1.
* Monitoring Continuity: Proper configuration of the SNMP agent is crucial for continuous and comprehensive monitoring of the VPLEX environment, which is essential for maintaining system performance and availability1.
By addressing the misconfiguration of the SNMP agent on the local VPLEX cluster management server, the service provider can restore full monitoring capabilities and ensure that both local and remote VPLEX clusters report performance statistics as expected.

NEW QUESTION # 40
What can be used to monitor VPLEX performance parameters?

A. EMCREPORTS utility
B. Unisphere Performance Monitor Dashboard
C. EMC SolVe Desktop
D. VPLEX Cluster Witness

Answer: B

Explanation:
The Unisphere Performance Monitor Dashboard is used to monitor VPLEX performance parameters. This dashboard is part of the Unisphere for VPLEX management suite and provides a graphical interface for monitoring various performance metrics.
* Unisphere for VPLEX: Unisphere for VPLEX is the management interface for VPLEX systems.It provides administrators with tools to configure, manage, and monitor VPLEX environments1.
* Performance Monitoring: The Performance Monitor Dashboard within Unisphere allows administrators to view real-time and historical performance data.This includes metrics such as I/O rates, latency, and throughput1.
* Dashboard Features: The dashboard offers various features such as performance charts, threshold alerts, and detailed reports that help in identifying performance trends and potential issues1.
* Accessibility: The dashboard is accessible through the Unisphere web interface, making it convenient for administrators to monitor the VPLEX system from any location1.
* Usage: To use the Performance Monitor Dashboard, administrators log into Unisphere for VPLEX, navigate to the performance section, and can then view and analyze the performance data presented in the dashboard1.
By using the Unisphere Performance Monitor Dashboard, administrators can effectively monitor VPLEX performance parameters, ensuring the system operates efficiently and meets performance requirements.

NEW QUESTION # 41
......

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