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D-XTR-DS-A-24 Bestehen Sie Dell XtremIO Design Achievement! - mit höhere Effizienz und weniger Mühen

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EMC D-XTR-DS-A-24 Prüfungsplan:

Thema	Einzelheiten
Thema 1	XtremIO X2 Optimization and Performance Management: For performance analysts and storage administrators, this section addresses XtremIO X2 system optimization and performance management. It provides an overview of performance metrics, XtremIO X2 architecture, and the application of environmental, host, and benchmarking tools for performance measurement and improvement.
Thema 2	Positioning XtremIO and X2: For sales engineers and solution architects, this section explores the benefits and positioning of XtremIO and XtremIO X2 storage solutions. It highlights All-Flash array advantages and XtremIO's specific benefits, including high performance and efficiency. The section covers XMS Simulator usage for demonstrations, post-processing operation benefits, and XtremIO Data Protection (XDP) performance value.
Thema 3	Designing an XtremIO X2 Solution: For solution architects and storage designers, this comprehensive section addresses design considerations and best practices for XtremIO X2 solutions. It covers performance design considerations to meet required standards, and designing solutions with features like deduplication, compression, encryption, and replication.
Thema 4	Host Configurations in XtremIO and X2 Environments: For system administrators and storage specialists, this section explores various host configurations crucial for optimal performance in XtremIO and XtremIO X2 environments. It covers common setups like host bus adapters (HBAs) and multipathing, as well as ESXi-specific configurations. The section also addresses configurations for other operating systems such as Microsoft Windows, Linux, Sun Solaris, IBM AIX, and HP-UX, ensuring broad compatibility and performance across different IT environments.

EMC Dell XtremIO Design Achievement D-XTR-DS-A-24 Prüfungsfragen mit Lösungen (Q40-Q45):

40. Frage
Which SCSI instructions are used to build a bitmap of the changes between the first snapshot and subsequent snapshots when RecoverPoint is used with XtremIO?

A. SCSI DIFF
B. SCSI DELTA
C. SCSI UPDATE
D. SCSI TRANSFER

Antwort: A

Begründung:
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.

41. Frage
When using the XtremIO PoC Toolkit, what is the purpose of the Age phase?

A. Test the performance of the All-Flash array with non-production static data
B. Continuously write to a specific range of logical block addresses to test Flash durability
C. Overwrite each LUN multiple times to ensure they contain all unique data
D. Scatter writes across the entire array to simulate ordinary use of the system

Antwort: C

Begründung:
The purpose of the Age phase in the XtremIO PoC (Proof of Concept) Toolkit is to overwrite each LUN (Logical Unit Number) multiple times to ensure that they contain all unique data.This process is crucial for simulating a real-world scenario where the storage array has been in use for some time, which allows for the evaluation of the performance and behavior of the All-Flash array under more typical conditions1.
References:
* The XtremIO PoC Toolkit documentation, which outlines the procedures and phases used during a proof of concept to evaluate the performance and capabilities of the XtremIO storage system1.
* Discussions and resources available on professional forums and communities that share insights into the use and stages of the XtremIO PoC Toolkit2.

42. Frage
What is true about the Solaris specific configuration settings?

A. Enable flow control
B. Increase the Maximum I/O Size parameter
C. Disable flow control
D. Decrease the Maximum I/O Size parameter

Antwort: A

Begründung:
In the context of Dell XtremIO storage arrays and their interaction with host systems such as Solaris, flow control is a network feature that manages data transmission and helps prevent packet loss when network congestion occurs. Enabling flow control on Solaris when it's connected to XtremIO arrays can be crucial for maintaining data integrity and ensuring smooth communication between the host and the storage system.
The Dell EMC Host Connectivity Guide for Oracle Solaris provides detailed instructions and best practices for configuring Solaris systems that are connected to Dell EMC storage arrays, including XtremIO1. While the document does not explicitly mention the setting to "enable flow control," it is generally recommended to enable flow control in enterprise environments to manage data flow effectively and to prevent data loss or corruption during peak loads or network issues.
Enabling flow control can help in managing the pace at which data packets are sent, allowing the receiving device to handle the incoming data without being overwhelmed. This is particularly important in high-performance environments where XtremIO arrays are used, as they often handle large volumes of data transfers.
In summary, enabling flow control is a recommended practice for Solaris specific configurations when interfacing with Dell XtremIO storage arrays to ensure data transfer reliability and system stability.

43. Frage
What is the recommended execution throttle setting for Windows, Linux, and VMware for Qlogic adapters?

A. 0
B. 1
C. 2
D. 3

Antwort: B

Begründung:
The recommended execution throttle setting for Qlogic adapters, when used with Windows, Linux, and VMware, is typically set to the maximum value to allow for the greatest throughput and performance. The execution throttle setting determines the maximum number of outstanding I/O operations that can be queued to the storage controller.For Qlogic Fibre Channel adapters, especially when the HBA speed is 8GBs or over, the execution throttle can be set to 65,5351. This high setting is used to ensure that the storage array can handle a large number of concurrent I/O requests, which is beneficial in environments with high-performance requirements.
References:
* Dell community discussions on Qlogic Fibre Channel adapter settings1.
* Knowledgebase articles and documentation on Dell EMC's official website2.

44. Frage
You are connecting a Linux host to an XtremlO array. The host will be connected to the array using the QLogic HBA's. Based on the recommended best practice, what is the value for the queue depth?

A. 0
B. 1
C. 2
D. 3

Antwort: B

Begründung:
When connecting a Linux host to an XtremIO array using QLogic HBAs, the recommended best practice for the queue depth value is 256.This setting ensures that the XtremIO X2 storage arrays handle an optimal number of SCSI commands, including I/O requests, which is crucial for maintaining high performance and efficient data processing1.
References:
* The Dell EMC Ready Solutions for Oracle with XtremIO X2 document specifies the LUN queue depth to the recommended value of 256 for the QLogic HBAs used in their virtualized databases server1.
* Additional discussions on HBA Queue Depth and host settings for environments utilizing XtremIO can be found in the Dell Community forums2.

45. Frage
......

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