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NEW QUESTION # 10
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 # 11
Which command can be used to create a distributed device from specified local devices?
Answer: A
Explanation:
To create a distributed device from specified local devices in a Dell VPLEX environment, the command used is ds dd create. This command is part of the VPLEX CLI and stands for "distributed storage - distributed device create".
* Identify Local Devices: Before creating a distributed device, you need to identify the local devices that will be part of the distributed device. These are typically volumes that are already provisioned and claimed by the VPLEX system1.
* Use the ds dd create Command: Execute the ds dd create command in the VPLEX CLI, specifying the local devices that you want to include in the distributed device. The syntax for the command includes the names of the local devices and the name you want to assign to the distributed device1.
* Command Execution: The command will initiate the creation of the distributed device, which involves pairing the specified local devices across the VPLEX clusters to create a single distributed volume that spans both clusters1.
* Verification: After running the command, verify that the distributed device has been created successfully by using the ll /distributed-storage/distributed-devices/ command, which lists all the distributed devices in the system1.
* Best Practices: It is important to follow the best practices for creating distributed devices as outlined in the Dell VPLEX Deploy Achievement documents. This includes ensuring that the local devices are properly configured and that the VPLEX clusters are in a healthy state before creating the distributed device1.
In summary, the ds dd create command is used to create a distributed device from specified local devices in a Dell VPLEX environment. This command is a fundamental part of managing distributed storage within VPLEX and is essential for achieving high availability and data mobility across clusters.
NEW QUESTION # 12
What is a requirement for zoning FC WAN COM ports on a VPLEX Metro?
Answer: A
Explanation:
For zoning FC WAN COM ports on a VPLEX Metro, the requirement is that each WAN COM port in the local cluster must be zoned to all WAN COM ports in the remote cluster. This setup ensures that there is a redundant network capability where each director on one cluster communicates with all the directors on the other site, even in the event of a fabric or network failure1.
* Zoning Configuration: The zoning needs to be fixed such that all A2-FC00 only see (are zoned with) remote A2-FC00 ports, and similarly for A2-FC01 with A2-FC01, and so on for all WAN COM ports1.
* Redundant Network: This zoning configuration provides a redundant network capability, which is essential for maintaining communication between the two VPLEX clusters in a Metro configuration1.
* Fabric Separation: The FC WAN COM ports will be connected to dual separate backbone fabrics or networks that span two sites, allowing for data flow between the two VPLEX clusters without requiring a merged fabric between the two sites1.
* Best Practices: For configuring FC WAN COM ports, it is recommended to refer to the
"Implementation and Planning Best Practices for EMC VPLEX Technical Notes" provided by Dell1.
In summary, the requirement for zoning FC WAN COM ports on a VPLEX Metro is to ensure that each WAN COM port in the local cluster is zoned to all WAN COM ports in the remote cluster, providing a robust and fault-tolerant communication network.
NEW QUESTION # 13
When using VPLEX Metro, what is the supported round trip time between clusters?
Answer: C
Explanation:
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.
NEW QUESTION # 14
What is the purpose of issuing the batch-migrate check-plan command?
Answer: D
NEW QUESTION # 15
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