Dell EMC E20-526 Exam Practice Test Instant Access

Question 1

A customer has decided to use VMware Horizon View as their desktop virtualization technology. Their VDI environment will consist of XtremIO storage and ESXi hosts. They are looking for increased speed and low latencies while performing file copy operations.

What should the setting for VAAI XCOPY I/O size be set to in order to achieve this requirement?

A8 kB

B63 kB

C256 kB

D4 MB

Answer : C

The VAAI XCOPY I/O size of 256 kB gives the best performance. 4 MB is the default value.

References: https://www.emc.com/collateral/white-papers/h14279-wp-vmware-horizon-xtremio-design-considerations.pdf, page 57

Question 2

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

Question 3

A customer has a group of applications that need storage which can provide low response times. The total I/O requirements are 75,000 IOPs with a 4 kB block size. They will have 500 LUNs and need to keep 30 daily snapshots of each LUN.

What is the smallest XtremIO configuration that will meet their needs?

A1 cluster with 2 X-Bricks

B1 cluster with 4 X-Bricks

C2 clusters with 1 X-Brick each

D2 clusters with 2 X-Bricks each

Answer : A

Question 4

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 5

A customer wants to use the Cinder driver to manage XtremIO storage in an OpenStack environment. What is a potential concern?

ACompression is not supported

BDeduplication is not supported

CSnapshots of snapshots are not supported

DVolume expansion cannot be reversed

Answer : D

Question 6

A storage administrator wants to re-use some of their XtremIO thin provisioned disks attached to a Microsoft Windows 2012 host. However, the administrator notices that ''Quick Format'' of the drives is taking a long time to complete. This has an impact on the overall performance.

What should be recommended to minimize the performance impact?

ADisable the I/O elevator feature on the Windows host while formatting

BTemporarily disable the UNMAP feature on the Windows host during formatting

CAdjust the execution throttle value on the Windows host

DChange the disk format to thick provisioned

Answer : B

It is related to TRIM/UNMAP, which is enabled per default in Server 2012(R2).

References:https://serverfault.com/questions/679211/quick-format-of-lun-in-server-2012r2-hosted-on-a-thin-provisioned-san-vol-take

Question 7

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

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