Free EMC D-XTR-DS-A-24 Practice Exam with Questions & Answers

TheSCSI DIFFinstruction is used to build a bitmap of the changes between the first snapshot and subsequent snapshots when RecoverPoint is used with XtremIO1.

The DIFF protocol is a vendor-specific SCSI command which RecoverPoint uses to query XtremIO in order to obtain a bitmap of changes between two snapshot sets1.RecoverPoint uses the output of the DIFF command to read the actual data and transfer it to the target side1.

The other options provided are not typically used for this purpose:

SCSI DELTAis not a recognized SCSI command2.

SCSI TRANSFERis not a recognized SCSI command3.

SCSI UPDATEis not a recognized SCSI command4.

Therefore, the verified answer is A.SCSI DIFF, as it is the SCSI instruction used to build a bitmap of the changes between the first snapshot and subsequent snapshots when RecoverPoint is used with XtremIO1.

For environments expected to grow significantly (more than 150 TB physical capacity), it is better to start with an X2-R cluster and add additional X2-R X-Bricks as needed. X2-R configurations are designed for a variety of use cases and can handle larger capacities and high-performance requirements.

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A Decision Support System (DSS) is a computer-based tool designed to aid individuals and organizations in making informed decisions. It integrates data, models, and analytical tools to solve complex problems and support strategic planning.A DSS is particularly effective in handling large volumes of data and applying sophisticated algorithms to generate insights that guide effective choices1.

A Data Warehouse is an example of a DSS workload because it is a centralized repository for storing large amounts of data from multiple sources.Its primary purpose is to facilitate reporting and analysis1. Data Warehouses are designed to perform queries and analysis on historical data and are an integral part of business intelligence that supports decision-making processes.

References:

A comprehensive explanation of what constitutes a DSS and its applications can be found in various resources, including those that define a Data Warehouse as a key component of DSS1.

The “Introduction to XtremIO X2 Storage Array” document by Dell Technologies provides insights into the system features that support DSS workloads like Data Warehouses2.

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In a VMware VDI solution utilizing VAAI XCOPY on XtremIO, the I/O size should be set to 256 kB.This setting is recommended to optimize the performance of the storage array during XCOPY operations, which are used to offload the copying of data within the storage array to the array itself, freeing up host resources1.

References:

The Dell support knowledge base article on using a VAAI claim rule to set the XCOPY size when using XtremIO for ESXi hosts recommends setting the XCOPY system value to 256 kB for XtremIO arrays1.

Additional information on VAAI XCOPY and its configuration can be found in the “Introduction to XtremIO X2 Storage Array” document, which provides insights into the system features that support such operations2.

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ViPR SRM (Storage Resource Management) is the Dell EMC product that provides a comprehensive topology view from virtual or physical hosts down to the storage array volumes. This tool is designed to help customers manage complex virtualized environments by offering insights into application-to-storage dependencies.ViPR SRM delivers detailed reporting and analytics, which can be used to optimize storage performance and capacity planning1.

References:

The Introduction to XtremIO X2 Storage Array document provides information on the system features and management tools available for XtremIO arrays, which includes details on how ViPR SRM can be used to visualize and manage the storage infrastructure1.

Additional resources on the Dell EMC support site offer documentation and guides on how to effectively use ViPR SRM for storage resource management2.

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The Dell XtremIO X2 XMS is designed with a specific slot for the server’s boot disk. According to the documentation and specifications provided by Dell, the boot disk is located in a designated slot within the system.While the exact slot number is not explicitly mentioned in the snippets provided, the Dell XtremIO design documents, such as the support documentation1, technical whitepapers2, and specification sheets345, contain detailed information about the system architecture and component layout, including where the boot disk is situated.

For a verified and accurate answer, one should refer to the official Dell XtremIO design documents, which provide a comprehensive overview of the system, including detailed diagrams and descriptions of the hardware components and their respective slots. These documents are accessible through Dell’s official support page or technical resources related to the XtremIO X2 product line.

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.

References:

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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To maximize the connectivity between Storage Controllers and Fibre Channel switches, all available ports should be utilized. This ensures redundancy and maximizes throughput. The exhibit provided shows a Storage Controller with four ports labeled 1, 2, 3, and 4. Without specific design documents, the general best practice is to use all available ports for suchconnections, assuming the ports are configured for Fibre Channel traffic and the infrastructure supports it.

References:

General best practices for Fibre Channel connectivity and port usage are discussed in various Dell EMC documents, such as the “Introduction to XtremIO X2 Storage Array” and “Configuring Fibre Channel Storage Arrays” documents12.

Specific port configurations and their usage would be detailed in the Dell XtremIO Design documents, which would provide definitive guidance on which ports to use for connecting to Fibre Channel switches.

The Live Optics Collector, which is used for profiling several hardware storage arrays including the Dell XtremIO family of all-flash arrays, can run on any host with IP connectivity to the storage array being profiled. The supported operating systems for the Live Optics Collector areWindows and Linux.This is based on the information provided by the Live Optics support documentation, which outlines the process to produce an XtremIO array storage profile1.

References:

The Live Optics support documentation provides detailed instructions on how to launch and run the Live Optics Collector, which includes the supported operating systems1.

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For a customer who wants to design an XtremIO solution for an Oracle RAC application environment, maintains two data centers, and requires replication to a third site for disaster recovery purposes, the recommended Dell EMC technology isMetroPoint1.

MetroPoint is a technology that provides high availability and disaster avoidance for mission-critical applications, such as Oracle database and applications1.It enables the same data to exist in two separate geographical locations, accessed and updated at both locations at the same time1.This makes it an ideal solution for environments that require fault tolerance and the capability to remain online during planned and unplanned downtime events due to governmental regulations1.