Dell EMC E20-526 Exam Practice Test Instant Access

Question 1

When creating XtremIO volumes for a host, which operating systems will benefit by changing the default logical block size for applications consisting of 4 KB I/Os?

AMicrosoft Windows and RHEL

BVMware ESX and Microsoft Windows

CRHEL and IBM AIX

DSun Solaris and HP-UX

Answer : B

With VMware ESX 5.5, the VMware hypervisor cannot work with LUNs that use a logical block size of 4K. When using VMware, be sure to specify Normal (512 LBs) from your XtremIO array.

References:https://gruffdba.wordpress.com/2015/08/02/4k-logical-block-size-size-fails-on-vmware/

Question 2

As shown in the exhibit, a customer's environment is configured as follows:

What should be the host queue depth setting per path?

A64

B128

C256

D1024

Answer : C

The queue depth is perLUN, and not perinitiator. Here there are 64 LUNs, each visible through 4 paths, which would indicate that 256 is a good choice for the queue depth setting.

Note: As a general advice, for optimal operation with XtremIO storage, consider the following: Set the queue depth to 256.

References:https://www.emc.com/collateral/white-paper/h14583-wp-best-practice-sql-server-xtremio.pdf

Question 3

What are common storage array mechanisms?

ALog structuring and RAID

BPost-processing and metadata logging

CRAID and metadata log structuring

DMetadata logging and RAID

Answer : B

XtremIO's snapshot technology is implemented by leveraging the content-aware capabilities of the system (Inline Data Reduction), optimized for SSD media, with a unique metadata tree structure.

XtremIO leverages a proprietary flash-optimized data protection algorithm (XtremIO Data Protection or XDP), which provides performance that is superior to any existing RAID algorithm.

References: Introduction to the EMC XtremIO STORAGE ARRAY (April 2015), page 33

Question 4

A Linux administrator is attaching a new RHEL server to their XtremIO storage array. Which configuration setting should be changed?

AEnable Logical Volume Manager

BModify the file system block size

CDisable HBA Queue Depth

DDisable I/O elevators

Answer : B

The block size for both Oracle Cluster Registry (OCR) and Cluster Synchronization Services (CSS) voting files are 512 bytes. I/O operations to these file objects are therefore sized as a multiple of 512 bytes.

This is of no consequence since the best practice with XtremIO is to create volumes with 512e formatting.

References:https://www.emc.com/collateral/white-papers/h13497-oracle-best-practices-xtremio-wp.pdf, page 22

Question 5

Which actions are initiated when a snapshot is created on an XtremIO array?

AParent object becomes read only and two auxiliary volumes are created

BParent object remains writeable and one auxiliary volume is created

CParent object remains writeable and two auxiliary volumes are created

DParent object becomes read only and one auxiliary volume is created

Answer : A

When a copy is created, the volume's existing metadata becomes an 'ancestor' entity (parent object) that is shared between the production volume and the copy. New empty containers are created for subsequent changes to both the production volume and the virtual copy volume. Therefore, the act of creating a copy is instantaneous and involves no data or metadata copies.

References: https://www.emc.com/collateral/white-paper/h13035-wp-introduction-to-xtremio-snapshots.pdf, pages 18

Question 6

A customer is interested in transitioning their traditional infrastructure to the Cloud by implementing ViPR software-defined storage in an XtremIO environment. Which capabilities will EMC ViPR software-defined storage provide to XtremIO?

ADelivers SaaSCentralized management and monitoringChargeback and billing capabilities

BChargeback reporting capabilityCentralizes reactive monitoring capabilityPolicy-driven configuration management

CAutomatically grows storage volumesSlows growth of dataCentralized auto-deletes of aging files

DCreates virtual storage poolsAutomates disaster recoveryReplaces chargeback capabilities

Answer : A

EMC ViPR Controller is a software-defined storage platform that abstracts, pools and automates a data center's underlying physical storage infrastructure. It provides data center administrators with a single control plane for heterogeneous storage systems.

ViPR enables software-defined data centers by providing features including:

* Comprehensive and customizable platform reporting capabilities that include capacity metering, chargeback, and performance monitoring through the included ViPR SolutionPack

References: Introduction to the EMC XtremIO STORAGE ARRAY (April 2015), page 60

Question 7

When installing a physical XtremIO Management Server (XMS) station, which requirement must be met?

AXMS must be able to access one of the management ports on one X-Brick storage controller in the cluster

BXMS must be able to access only the management ports on the first X-Brick's storage controllers

CXMS must be able to access all management ports on the X-Brick storage controllers

DXMS must be able to access all management ports on at least two X-Brick storage controllers in the cluster

Answer : C

The XMS must access all management ports on the X-Brick Storage Controllers, and must be accessible by any GUI/CLI client host machine.

References: Introduction to the EMC XtremIO STORAGE ARRAY (April 2015), page 48

Dell EMC E20-526 Technology Architect, XtremIO Solutions Specialist Exam Practice Test