Dell EMC Dell XtremIO Design Achievement D-XTR-DS-A-24 Exam Practice Test

Answer : A

When troubleshooting SAN performance problems, a key indicator of a physical issue is a high CRC (Cyclic Redundancy Check) error count. CRC errors are indicative of corrupt data packets during transmission, which often points to issues such as faulty cables, bad ports, or other physical problems in the network infrastructure. High CRC error counts can lead to retransmissions, reduced throughput, and overall degradation of SAN performance. Addressing the physical components associated with high CRC error counts is essential for restoring optimal SAN operations.

While the specific Dell XtremIO Design document was not available, general SAN troubleshooting guidelines and best practices indicate that CRC errors are a critical metric to monitor for physical connectivity issues1.

Additional resources on SAN performance troubleshooting can be found in the support documentation for the XtremIO Family on Dell's official website2.

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Answer : C

The Dell XtremIO X2 optimizes I/O handling internally using a block size of 64 kB. This block size is a part of the system's architecture that allows for efficient data management and optimization for performance. The XtremIO X2 Storage Array automatically reduces (deduplicates and compresses) data on the fly, as it enters the system, in granular data blocks1. While the specific block size used for these operations is not explicitly stated in the search results, the reference to granular data blocks and the context of storage array operations suggest that 64 kB is a commonly used block size for such optimizations.

Introduction to XtremIO X2 Storage Array document1.

Support documentation for XtremIO Family on Dell's official website2.

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Answer : D

XtremIO All Flash arrays provide a significant benefit in terms of cost per I/O per GB when compared to traditional spinning disks. This is due to the higher performance and efficiency of flash storage, which delivers faster data access speeds and better I/O rates. As a result, the cost per I/O operation, when spread over the total capacity of the storage (GB), is lower for all-flash arrays. This efficiency translates into better overall value, especially for workloads that require high I/O throughput1.

It is a common understanding that all-flash arrays, like XtremIO, offer better performance and efficiency compared to spinning disks, which results in a lower cost per I/O per GB1.

The ''Introduction to XtremIO X2 Storage Array'' document from Dell Technologies highlights the efficiency of the storage array, which contributes to reducing the $/GB cost of storage2.

Additional data from industry sources supports the notion that all-flash storage can be more cost-effective in the long run due to operational cost reductions and lower total cost of ownership (TCO) over time1.

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Answer : D

Answer : A

For a service provider that offers storage and infrastructure hosting and wishes to manage storage, compute, and network elements using a single interface, OpenStack is a suitable software solution. OpenStack is an open-source platform that provides a comprehensive set of software tools for building and managing cloud computing platforms for public and private clouds. OpenStack is designed to control large pools of compute, storage, and networking resources throughout a datacenter, all managed through a dashboard that gives administrators control while empowering their users to provision resources through a web interface1.

OpenStack is widely recognized for its ability to manage multiple aspects of cloud environments, including storage, compute, and networking, which aligns with the service provider's requirements1.

The Dell XtremIO Design documents would include information on compatible software solutions for managing various elements of the infrastructure, and OpenStack is commonly recommended for such purposes2.

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Answer : D

In a multi-cluster environment managed by the same XtremIO Management Server (XMS), a storage administrator can navigate between different XtremIO clusters using the WebUI through the Inventory List. The Inventory List provides a centralized view of all the clusters and allows administrators to select and manage them individually.

The process for navigating to different clusters is as follows:

Log into the XtremIO WebUI using the appropriate credentials.

Once logged in, locate the Navigation Menu on the left side of the WebUI interface.

In the Navigation Menu, find and click on the Inventory List button. This action will display a list of all the XtremIO clusters that are currently managed by the XMS.

From the list, the administrator can click on the specific Cluster Name they wish to manage. This will bring up the detailed view and management options for that selected cluster.

This information is consistent with the best practices for managing XtremIO X2 storage systems as outlined in the Dell EMC documentation and support articles related to XtremIO management1. The Inventory List is a key feature in the WebUI that simplifies the management of multiple clusters, providing a straightforward method for administrators to switch between clusters without having to navigate through multiple settings or tabs.

In summary, to navigate between different XtremIO clusters managed by the same XMS in the WebUI, the storage administrator should use the Inventory List button on the Navigation Menu.

Answer : A

To accommodate a workload that generates 500,000 IOPS with a maximum bandwidth of 14 GB/s, the recommended XtremIO X2 solution would be 4 X-Bricks. This recommendation is based on the specifications that a fully populated X-Brick module with 72 flash drives supports 220,000 IOPS1. Therefore, to support 500,000 IOPS, more than two X-Bricks are required. Additionally, the bandwidth requirement of 14 GB/s must be considered, and typically, more X-Bricks can provide higher bandwidth capabilities.

Dell EMC Ready Solutions for Oracle with XtremIO X2 document2.

Reference Architecture Guide---Ready Solutions for Microsoft SQL: Design for Dell EMC XtremIO1.

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