LATEST D-VPX-OE-A-24 TRAINING - RELIABLE D-VPX-OE-A-24 BRAINDUMPS BOOK

Latest D-VPX-OE-A-24 Training - Reliable D-VPX-OE-A-24 Braindumps Book

Latest D-VPX-OE-A-24 Training - Reliable D-VPX-OE-A-24 Braindumps Book

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EMC Dell VPLEX Operate Achievement Sample Questions (Q12-Q17):

NEW QUESTION # 12
In a VPLEX Metro, what factor has a direct impact on VPLEX performance with respect to WAN bandwidth?

  • A. Write rate on distributed volumes
  • B. Read rate on distributed volumes
  • C. Raid rebuild on array
  • D. Thin pool rebalances

Answer: A

Explanation:
In a VPLEX Metro environment, the write rate on distributed volumes has a direct impact on VPLEX performance with respect to WAN bandwidth. Here's how:
* Distributed Volumes: Distributed volumes in VPLEX Metro span across two geographically separated clusters and are designed to provide continuous availability and data mobility1.
* Write Operations: Write operations on distributed volumes require data to be written to both clusters before an acknowledgment is sent back to the host.This ensures data consistency across both sites2.
* WAN Bandwidth: The Wide Area Network (WAN) bandwidth between the two clusters is a critical factor in the performance of these write operations.If the WAN bandwidth is insufficient, it can lead to increased latency and reduced throughput3.
* Performance Impact: With only half the available WAN-COM paths, VPLEX can exceed bandwidth limitations on the existing WAN-COM paths, causing severe latency impacting the remote writes of distributed devices3.
* Best Practices: VPLEX best practices indicate that the round-trip time (RTT) between VPLEX clusters shouldn't exceed 5 ms to provide the best performance, and an RTT of 1 ms is recommended for a campus-wide network2.
By managing the write rate on distributed volumes and ensuring adequate WAN bandwidth, VPLEX Metro can maintain high performance and meet the required service levels for data availability and accessibility.


NEW QUESTION # 13
What determines which cluster will service I/O in the event of a WAN COM failure for a distributed device that is not a member of a consistency group?

  • A. VPLEX Witness
  • B. Detach rule of the storage view
  • C. Detach rule of the consistency group
  • D. Rule set of the distributed device

Answer: D


NEW QUESTION # 14
What is a consideration for using a VPLEX logging volume?

  • A. Must be created on each VPLEX cluster before creating a distributed device
  • B. A distributed device must be created before a logging volume can be created
  • C. VIAS can be used to create a logging volume at each cluster
  • D. Automatically provisioned at each VPLEX cluster when the distributed device is created

Answer: A

Explanation:
When considering the use of a VPLEX logging volume, it is important to note that a logging volume must be created on each VPLEX cluster before creating a distributed device. This is because logging volumes play a critical role in the VPLEX architecture by capturing write logs that are essential for data consistency and recovery processes.
* Role of Logging Volumes: Logging volumes in VPLEX are used to store write logs that ensure data consistency across clusters, especially in distributed device configurations1.
* Creation Before Distributed Devices: Before a distributed device can be created, which spans across clusters for high availability, logging volumes must exist on each cluster to handle the write logging required for the distributed device1.
* VIAS and Automatic Provisioning: While VIAS (VPLEX Integrated Array Services) is a tool that simplifies storage provisioning tasks, and automatic provisioning can occur in certain scenarios, the creation of logging volumes is a prerequisite step that typically requires explicit action by the administrator before distributed devices are set up1.
* Sequence of Operations: The sequence of operations is such that logging volumes are created first, providing the necessary infrastructure for capturing write logs, followed by the creation of distributed devices that will utilize these logging volumes1.
By ensuring that logging volumes are created on each VPLEX cluster prior to the creation of distributed devices, administrators can maintain the integrity and high availability of data within the VPLEX environment.


NEW QUESTION # 15
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 # 16
A new VPLEX system has been installed that uses ESRS. The firewall administrator has opened ports 25,
9010, and 5901 between VPLEX and ESRS. A support ticket is
logged. While trying to troubleshoot, the technical support engineer cannot access the GUI of VPLEX.
Which port needs to be opened on the firewall?

  • A. 0
  • B. 1
  • C. 2
  • D. 3

Answer: C

Explanation:
When setting up a VPLEX system that uses ESRS (EMC Secure Remote Services), it is essential to ensure that the correct ports are open to allow for various types of communication, including access to the VPLEX GUI.
The port that needs to be opened on the firewall to allow access to the VPLEX GUI is port 443.
* Port 443: This port is commonly used for HTTPS traffic, which is the protocol used for secure web communications.The VPLEX GUI is accessed over a web browser using HTTPS, hence the need for port 443 to be open1.
* Firewall Configuration: The firewall administrator must configure the firewall to allow inbound and outbound traffic on port 443 to the VPLEX system's IP address.This ensures that the technical support engineer and other users can access the VPLEX GUI through a secure connection1.
* Troubleshooting Access Issues: If the technical support engineer cannot access the VPLEX GUI, one of the first steps in troubleshooting is to check the firewall settings to confirm that the necessary ports, including port 443, are open1.
* ESRS Communication: While ports 25, 9010, and 5901 are important for ESRS communication and other services, they do not facilitate access to the VPLEX GUI.Port 25 is typically used for SMTP email services, port 9010 may be used for internal services, and port 5901 could be used for VNC or other remote access protocols1.
* Secure Access: Opening port 443 not only allows access to the VPLEX GUI but also ensures that the communication is encrypted and secure, protecting sensitive data and system configurations1.
By opening port 443 on the firewall, the company ensures secure and reliable access to the VPLEX GUI for administration, monitoring, and troubleshooting purposes.


NEW QUESTION # 17
......

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