D-VPX-DY-A-24 Exam Dumps - Dell VPLEX Deploy Achievement

When provisioning LUNs from active/passive arrays to VPLEX, it is essential that each VPLEX director has at least two paths to both the active and passive controllers of each array. This requirement ensures high availability and redundancy for the storage volumes being managed by VPLEX1.

Active/Passive Arrays: Active/passive arrays have one controller actively serving I/O (active) and another on standby (passive). The VPLEX system must have paths to both controllers to maintain access to the LUNs in case the active controller fails1.

Path Redundancy: Having at least two paths to both controllers from each VPLEX director provides redundancy. If one path fails, the other can continue to serve I/O, preventing disruption to the host applications1.

VPLEX Configuration: In the VPLEX configuration, paths are zoned and masked to ensure that the VPLEX directors can access the LUNs on the storage arrays. Proper zoning and masking are critical for the paths to function correctly1.

Failover Capability: The dual-path configuration allows VPLEX to perform an automatic failover to the passive controller if the active controller becomes unavailable, ensuring continuous data availability1.

Best Practices: Following the path requirement as per Dell EMC’s best practices ensures that the VPLEX system can provide the expected level of service and data protection for the provisioned LUNs1.

In summary, the path requirement for each VPLEX director when connecting to active/passive arrays is to have at least two paths to both the active and passive controllers of each array, providing the necessary redundancy and failover capabilities.

For a database administrator who needs access to diagnostic files from the VPLEX system but does not have shell access, the recommended method is to use Secure Copy Protocol (SCP) to copy the files. SCP is a secure file transfer protocol that allows files to be copied over a network.

Access the Management Server: First, the administrator must access the VPLEX management server for the cluster from which they need to collect the logs1.

SSH to the Director: Using SSH, the administrator logs in as root to the director from which the logs need to be collected1.

Navigate to Log Directory: Change the directory to /var/log on the director to access the log files1.

Create a Tarball of Logs: Use the tar command to create a compressed archive (tarball) of the log files1.

Copy the Tarball Using SCP: Use SCP to copy the tarball to the management server’s /tmp directory. The administrator will be prompted for the service account password before the file can be transferred1.

Access the Files: Once the files are on the management server, the database administrator can download them from the /tmp directory using SCP from their workstation1.

This process allows the database administrator to obtain the necessary diagnostic files without having direct shell access to the VPLEX system.

The default subnet mask for a management server network, specifically for the network 128.221.252.0, is typically a subnet mask that allows for a small number of hosts, as management networks do not usually require a large number of IP addresses.

Subnet Mask Purpose: A subnet mask is used in IP networking to divide the IP address into a network and host identifier. The default subnet mask for a particular network depends on the class and configuration of the network1.

Management Server Network: For a management server network like 128.221.252.0, a common default subnet mask is 255.255.255.248. This subnet mask allows for up to 6 usable IP addresses, which is generally sufficient for management purposes1.

Network Configuration: The choice of subnet mask can affect the number of hosts that can be accommodated within a network. A subnet mask of 255.255.255.248 indicates a very small network, often used for specialized network segments such as management interfaces1.

Dell VPLEX Configuration: In the context of Dell VPLEX Deploy Achievement, the management server network would be configured with a subnet mask that supports the network architecture and design best practices as outlined in Dell’s documentation1.

Best Practices: It is important to follow the recommended settings and configurations provided in the Dell VPLEX Deploy Achievement documents to ensure proper network segmentation, security, and performance1.

In summary, the default subnet mask value for a management server network like 128.221.252.0 is typically 255.255.255.248, which aligns with the standard practices for configuring management networks in a Dell VPLEX environment.

When using VPLEX with RecoverPoint enabled consistency groups, it is important to ensure that local copy volumes and production volumes are placed in separate consistency groups. This separation is crucial for maintaining the integrity of the data replication and recovery processes.

Consistency Group Configuration: Consistency groups in VPLEX are logical groupings of virtual volumes that VPLEX treats as a single unit for operations such as data mobility and recovery. When RecoverPoint is enabled, these groups also align with RecoverPoint consistency groups for replication purposes1.

Separation of Volumes: Keeping local copy volumes (volumes used for local replication) and production volumes (active volumes serving data to hosts) in separate consistency groups helps to prevent any potential conflicts or issues with replication and ensures that the local copies are consistent and usable for recovery1.

RecoverPoint Replication: RecoverPoint provides continuous data protection and replication for recovery to any point in time. The separation of volumes into different consistency groups helps to manage and maintain the replication process effectively1.

Operational Management: By separating these volumes into different consistency groups, administrators can manage operations such as replication, failover, and recovery with greater precision and control1.

Best Practices: This separation is part of the best practices recommended by Dell EMC when configuring VPLEX with RecoverPoint, ensuring that the system operates efficiently and that data is protected in case of any failures1.

In summary, when using VPLEX with RecoverPoint enabled consistency groups, local copy volumes and production volumes must be placed in separate consistency groups to ensure proper replication and recovery processes.

When using VPLEX Metro, the supported round trip time (RTT) between clusters is a crucial factor for optimal performance. The RTT is the time it takes for a signal to travel from one cluster to another and back again.

RTT Importance: The RTT affects how quickly data can be synchronized between the two clusters. A lower RTT means faster synchronization, which is essential for maintaining the high availability and data consistency that VPLEX Metro is designed to provide1.

Supported RTT: The supported network round trip latency for VPLEX Metro is up to 5 ms. This is the maximum latency that allows the system to perform optimally without significant performance degradation1.

Performance Considerations: If the inter-cluster FC/IP WAN network experiences congestion, it can result in an increased RTT, which may cause performance issues. Therefore, it’s important to ensure that the network infrastructure supports the required RTT1.

Best Practices: Dell EMC recommends keeping the RTT as low as possible, ideally around 1 ms for a campus-wide network, to provide the best performance. However, VPLEX Metro can support RTTs up to 5 ms under optimal conditions1.

Monitoring and Management: It’s important to monitor the RTT regularly and manage the network to avoid congestion. Tools and techniques should be in place to measure and maintain the RTT within the supported range1.

In summary, the supported round trip time between clusters when using VPLEX Metro is 5 ms. This parameter is critical for ensuring that the VPLEX Metro operates within the designed performance specifications.