D-XTR-OE-A-24 Exam Dumps - EMC Storage Administrator Questions and Answers

The RESTful API method used to retrieve an existing configuration from a system like XtremIO is the HTTP GET methD.The GET method is used to request data from a specified resource and is one of the most common HTTP methods used in RESTful APIs1.

In the context of the XtremIO REST API, the GET method would be used to access various types of information about the array’s configuration.For example, to retrieve details about the volumes configured on an XtremIO array, you would issue a GET request to the appropriate endpoint of the XtremIO REST API2.

The HTTP POST method, on the other hand, is typically used to send data to the server to create or update a resource.The terms HTTP RETRIEVE and HTTP GATHER are not standard RESTful API methods and are not used in the context of the XtremIO REST API or any RESTful API1.

The XtremIO X2-S system allows for a minimum of 12 SSDs and a maximum of 36 SSDs per Disk Array Enclosure (DAE).

This flexibility in the number of SSDs per DAE allows for scalable storage configurations tailored to varying performance and capacity requirements.

References:

Dell XtremIO X2-S Technical Specifications

XtremIO Product Documentation

The correct sequence of steps to map a volume to a host using the XtremIO WebUI is:

Select the volume.

Select an initiator group.

Assign a LUN number.

Click ‘Create/Modify Mapping’.

View/verify the results.

To map a volume to a host in the XtremIO WebUI, you would follow these steps:

Select the volume: Navigate to the volume you wish to map and select it. This is the first step because you need to specify which volume you’re working with.

Select an initiator group: Choose the initiator group that corresponds to the host to which you want to map the volume. An initiator group contains one or more initiators that uniquely identify the host in the storage environment.

Assign a LUN number: Specify a Logical Unit Number (LUN) for the volume in this mapping. The LUN is an identifier for the volume in the context of the host to which it’s being mapped.

Click ‘Create/Modify Mapping’: After selecting the volume, initiator group, and assigning a LUN, you’ll execute the command to create the mapping by clicking this button.

View/verify the results: Finally, check the mapping to ensure that it has been successfully created and is functioning as expected.

This sequence of steps ensures that the volume is properly configured and connected to the host, allowing for efficient data management and access within the Dell XtremIO storage system.

7 Days:Given that 500 production volumes must be backed up four times a day using XtremIO’s Protection Copies feature, the system can store the read-only volumes for approximately 7 days before the oldest backups are deleted.

This calculation ensures that the array’s capacity is used efficiently while adhering to the backup policy requirements.

References:

Dell XtremIO Protection Copies Feature Guide

XtremIO Backup and Recovery Best Practices

The design concept of the XtremIO X2-S X-Brick configuration is to provide high logical capacity.

This allows for efficient storage management and data reduction technologies, enabling organizations to maximize their storage resources.

The high logical capacity supports extensive data consolidation and improved storage utilization.

References:

Dell XtremIO X2-S Configuration Guide

XtremIO Product Documentation

Offloaded Data Transfer (ODX) is a feature in Windows that enables efficient data transfer within or between compatible storage arrays, minimizing the host resources used during these operations.When a Microsoft Windows host is connected to an XtremIO array, leveraging ODX can significantly reduce the host’s CPU and network resource utilization during Volume Shadow Copy Service (VSS) operations1.

ODX Functionality: ODX offloads the data transfer workload from the host to the storage array itself.This means that data can be moved or copied within the array without passing through the host, thus not consuming host bandwidth or processing power1.

VSS Operations: During VSS operations, which create snapshots or backups of data, there can be a significant amount of data movement.Utilizing ODX allows these operations to be handled more efficiently by the storage array, freeing up the host to perform other tasks1.

XtremIO Compatibility: XtremIO supports ODX, which allows it to handle data movement operations internally.This is particularly beneficial in environments wherefrequent snapshots or backups are taken, as it ensures minimal impact on host performance1.

Other Options: While MPIO (OA) is used for path redundancy and load balancing, VAAI (OB) offloads certain storage operations to the array, and VSI (OC) is a set of VMware integration tools, none of these specifically address the reduction of host resource utilization during VSS operations as effectively as ODX1.

For synchronous replication from an XtremIO X1 cluster to a third-party array, the solution that enables this operation isVPLEX with RecoverPoint. Here’s why:

VPLEX: Dell EMC VPLEX is a virtualization and data mobility solution that allows for continuous availability and data mobility across arrays within a data center and over distance.It is often used in conjunction with RecoverPoint to provide synchronous replication1.

RecoverPoint: Dell EMC RecoverPoint offers continuous data protection with multiple replication options, including synchronous and asynchronous replication.It is designed to work with various storage arrays, including third-party arrays, providing flexibility in replication strategies1.

Combination of VPLEX and RecoverPoint: When combined, VPLEX and RecoverPoint offer a comprehensive solution that supports synchronous replication, ensuring zero data loss (RPO=0) and enabling consistency across sites.This combination is particularly useful when integrating XtremIO with third-party arrays1.

Native XtremIO Replication: While XtremIO does offer native replication capabilities, these are typically asynchronous and are designed to work within the XtremIO ecosystem.For synchronous replication, especially to a third-party array, the native replication may not be sufficient1.

RecoverPoint for VMs: This variant of RecoverPoint is specifically designed for virtual environments and may not be the best fit for array-based synchronous replication requirements1.

Therefore, the correct answer isVPLEX with RecoverPoint(OD), as it provides the necessary infrastructure and capabilities for synchronous replication from an XtremIO X1 cluster to a third-party array, ensuring data consistency and zero data loss during the replication process1.

When using XtremIO storage arrays for Oracle ASM disk groups, the recommended redundancy type is typically external redundancy.This is because XtremIO arrays are built with inherent data protection and redundancy features that eliminate the need for additional mirroring at the ASM level1.

External Redundancy: With external redundancy, Oracle ASM does not mirror data within the disk group. Instead, it relies on the underlying storage system to provideredundancy and data protection.XtremIO’s unique data protection scheme, XDP (XtremIO Data Protection), provides such redundancy1.

XtremIO Features: XtremIO arrays are designed with high levels of fault tolerance and include features like SSD failover and advanced error correction.These features ensure data integrity and availability, making external redundancy a suitable choice1.

Performance Considerations: Choosing external redundancy can also lead to better performance since it avoids the overhead of additional mirroring at the ASM level, which is unnecessary given XtremIO’s capabilities1.

Best Practices: Dell EMC recommends using external redundancy for ASM disk groups when using storage arrays like XtremIO that provide their own robust data protection mechanisms1.

In summary, for Oracle ASM disk groups using XtremIO storage arrays, external redundancy (OC) is the recommended setting, as it leverages the array’s built-in redundancy features and optimizes performance1.