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Free D-PVM-OE-01 Exam Braindumps (page: 4)

Page 3 of 14
PDF with 49 Questions

When setting Host I/O Limits on a Storage Group, what are the available dynamic I/O distribution modes?

  1. Never, OnFailure. and Always
  2. Balanced Always, and OnFailure
  3. Never, Balanced, and Always
  4. Balanced, OnFailure. and Never

Answer(s): C

Explanation:

Step by Step Comprehensive Detailed

Host I/O Limits in PowerMax allow you to control the maximum IOPS (Input/Output Operations Per Second) or bandwidth that a storage group can consume. This helps prevent performance issues caused by one application or workload monopolizing resources.
When setting Host I/O Limits, you can choose from different dynamic I/O distribution modes:

Never: This is the default mode. It means that the I/O limits are statically distributed across the directors in the associated masking view. If a director fails, its allocated portion of the I/O limit is lost.

Balanced: In this mode, the I/O limits are dynamically adjusted based on the number of online directors. If a director fails, its I/O limit is redistributed among the remaining online directors. This helps maintain performance even in the event of a director failure.

Always: This mode provides full dynamic distribution of I/O limits. The limits are continuously adjusted across all online directors based on the current workload and demand. This ensures optimal resource utilization and performance.

Reference and documents of Dell's public documentation for PowerMax Operate v.2:

Dell PowerMax and VMware vSphere Configuration Guide: This guide provides detailed information about Host I/O Limits, including the different distribution modes and their benefits. You can find this document on the Dell Support website by searching for "PowerMax and VMware vSphere Configuration Guide."

Dell Solutions Enabler 10.0.0 CLI User Guide: This guide provides information on how to set Host I/O Limits using SYMCLI commands, including the -dynamic option for specifying the distribution mode.



What are the two configuration rules that apply to SRDF groups and connections during Non- Disruptive Migrations'?

  1. The source and target arrays are at most one hop away from the control host
  2. Two DM RDF groups are created per SG migration session
  3. RF and RE ports are supported, with RF ports being selected if both types are available
  4. A single array cannot have multiple DM RDF groups
  5. DM RDF groups are configured with a minimum of one path

Answer(s): A,E

Explanation:

Step by Step Comprehensive Detailed

Non-Disruptive Migration (NDM) is a feature in PowerMax that allows you to migrate data between storage arrays without any downtime or disruption to host applications. During NDM, SRDF (Symmetrix Remote Data Facility) is used to replicate data between the source and target arrays. Here are the configuration rules that apply to SRDF groups and connections during NDM:

A . The source and target arrays are at most one hop away from the control host: The control host, which manages the NDM process, must have direct connectivity to both the source and target arrays. This ensures efficient communication and control during the migration.

E . DM RDF groups are configured with a minimum of one path: SRDF groups used for NDM (DM RDF groups) must have at least one active path between the source and target arrays. This ensures that data can be replicated continuously during the migration.

Why other options are incorrect:

B . Two DM RDF groups are created per SG migration session: This is not a strict requirement. The number of DM RDF groups may vary depending on the configuration and the specific NDM operation.

C . RF and RE ports are supported, with RF ports being selected if both types are available: While RF and RE ports are supported for SRDF, there's no specific preference for RF ports during NDM. The choice of ports depends on the overall network configuration and availability.

D . A single array cannot have multiple DM RDF groups: An array can have multiple DM RDF groups if needed for different NDM operations or configurations.

Reference and documents of Dell's public documentation for PowerMax Operate v.2:

Dell PowerMax Family: Essentials and Best Practices Guide: This guide provides an overview of NDM and its requirements, including information about SRDF configuration.

Dell Solutions Enabler 10.0.0 CLI User Guide: This guide provides detailed information about SRDF

commands and configuration options, which are relevant for NDM operations.



Refer to the exhibit.



What is the Unisphere for PowerMax deployment option pictured?

  1. Embedded
  2. Either remote or local
  3. Remote
  4. Local

Answer(s): C

Explanation:

Step by Step Comprehensive Detailed

Unisphere for PowerMax offers different deployment options to manage PowerMax storage arrays.
Based on the exhibit, we can identify the following:

Separate SYMAPI Server: The diagram shows a dedicated SYMAPI server. SYMAPI (Symmetrix Application Programming Interface) is a command-line interface used to manage PowerMax and VMAX storage arrays. This indicates that the Unisphere server is not directly connected to the storage arrays.

Unisphere Server Connected to SYMAPI Server: The Unisphere server is shown to be connected to the SYMAPI server. This means that the Unisphere server relies on the SYMAPI server to communicate with the PowerMax arrays.

No Direct Connection to Arrays: The Unisphere server does not have a direct connection to the PowerMax arrays.

Considering these points, the deployment option depicted in the exhibit is a remote deployment. In a remote deployment, the Unisphere server is installed on a separate host and communicates with the PowerMax arrays through a SYMAPI server. This allows for centralized management of multiple arrays from a single Unisphere instance.

Why other options are incorrect:

A . Embedded: In an embedded deployment, the Unisphere software runs directly on the PowerMax array itself. This eliminates the need for a separate Unisphere server.

B . Either remote or local: While the diagram could technically represent a local deployment with a dedicated SYMAPI server, the presence of the separate SYMAPI server and the lack of direct connection to the arrays strongly suggest a remote deployment.

D . Local: In a local deployment, the Unisphere server is typically installed on the same host as Solutions Enabler, which has direct connectivity to the storage arrays.

Reference and documents of Dell's public documentation for PowerMax Operate v.2:

Dell Unisphere for PowerMax 10.0.0 Installation Guide: This guide provides detailed information about the different Unisphere deployment options, including local, remote, and embedded. It also includes diagrams and explanations of each deployment scenario. You can find this document on the Dell Support website by searching for "Unisphere for PowerMax Installation Guide."

Dell PowerMax Family: Essentials and Best Practices Guide: This guide offers a general overview of PowerMax systems and their management using Unisphere. It may provide context for understanding the different deployment options.



What is an update operation in SRDF on PowerMax arrays?

  1. process to retain the data on the target R2 side
  2. A process used to return to the original production site after a failover event
  3. A process that initiates an incremental copy from the target R2 to the source R1
  4. A process that allows separate hosts to access the same data independently

Answer(s): C

Explanation:

Step by Step Comprehensive Detailed

In SRDF (Symmetrix Remote Data Facility), an "update" operation refers to a specific process where changes made on the target (R2) side are copied back to the source (R1) side. This is typically used in disaster recovery scenarios where:

Failover: A failover occurs, and the target (R2) becomes the active production site.

Data Modification: Data is modified or updated on the target (R2) while it's acting as the primary.

Update Operation: An "update" is initiated to synchronize the changes from the target (R2) back to the source (R1), ensuring that the source has the latest data.

This process is crucial for maintaining data consistency and ensuring a smooth transition back to the original production site after a failover event.

Why other options are incorrect:

A . process to retain the data on the target R2 side: This is not specific to an "update" operation. Data retention on the target is a general aspect of SRDF.

B . A process used to return to the original production site after a failover event: While an "update" is part of the failback process, it's not the entire process itself. Failback involves other steps like reversing replication direction and restoring host access.

D . A process that allows separate hosts to access the same data independently: This describes a different SRDF configuration (like Active/Active) and is not related to the "update" operation.

Reference and documents of Dell's public documentation for PowerMax Operate v.2:

Dell Solutions Enabler 10.0.0 SRDF Family CLI User Guide: This guide provides detailed information about SRDF commands and operations, including the symrdf update command used to initiate an update from R2 to R1. You can find this document on the Dell Support website by searching for "Solutions Enabler SRDF Family CLI User Guide."

Dell PowerMax Family: Essentials and Best Practices Guide: This guide offers a comprehensive overview of SRDF and its functionalities, including disaster recovery scenarios and the use of the "update" operation.






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