XtremIO Solutions and Design Specialist Exam for Technology Architects v7.0 (E20-526)

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Total 67 questions

A customer has a VMware vSphere environment running Native Multipathing (NMP). Which path selection policy should be set for optimal performance when connected to an XtremIO cluster?

  • A. Fixed AP
  • B. Most Recently Used
  • C. Fixed
  • D. Round Robin

Answer : D

Configuring vSphere Native Multipathing.
For best performance, it is recommended to do the following:
Set the native round robin path selection policy on XtremIO volumes presented to the ESX host.
References: https://itzikr.wordpress.com/2015/12/16/host-configuration-for-vmware- vsphere-on-emc-xtremio/

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

  • A. Enable Logical Volume Manager
  • B. Modify the file system block size
  • C. Disable HBA Queue Depth
  • D. Disable 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

You need to design a VDI solution for a customer. Which best practices should be used for
VDI environments?

  • A. Align data on 4 kB boundaries. Put persona and user data on XtremIO LUNs
  • B. Align data on 4 kB boundaries. Allocate multiple XtremIO LUNs to each host
  • C. Align data on 8 kB boundaries. Put the master VM image on an XtremIO LUN
  • D. Align data on 8 kB boundaries. Put all VDI-related data on one large LUN

Answer : C

A customers storage administration team wants to receive e-mail notifications when the
XtremIO cluster detects an issue of major seventy. The customer has successfully configured and tested the e-mail server in the XtremIO GUI. However, the e-mail server is not receiving the expected notifications when major severity issues appear.
What is the cause of this issue?

  • A. Alert definitions have not been defined
  • B. Event handlers have not been defined
  • C. Public reports have not been defined
  • D. Private reports have not been defined

Answer : A

What is a method to establish an XMCLI session?

  • A. Use the PuTTY SSH tool configured for the serial port and xmsupload credentials
  • B. Use the Telnet SSH tool configured on Port 443 and root credentials
  • C. Use the CLI terminal in the Administration tab and root credentials
  • D. Use the PuTTY SSH tool configured for Port 22 and xmsadmin credentials

Answer : D

The system's Command Line Interface (CLI) allows administrators and other system users to perform supported management operations. It is preinstalled on the XMS and can be accessed using the standard SSH protocol.
PuTTY is an SSH and telnet client.
The standard TCP port 22 has been assigned for contacting SSH servers.
You can login using the builtin xmsadmin account.
References: Introduction to the EMC XtremIO STORAGE ARRAY (April 2015), page 50

A storage administrator wants to add a volume to their XtremIO storage array using the
RESTful API. Which RESTful method should be used to complete this task?


Answer : A

An example of a generic wrapper function that queries XtremIO REST API using
HTTP/POST to create a new object with specified properties.

References: https://www.emc.com/collateral/white-papers/h14980-wp-accelerate-sql- lifecycle-management.pdf

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?

  • A. 1 cluster with 2 X-Bricks
  • B. 1 cluster with 4 X-Bricks
  • C. 2 clusters with 1 X-Brick each
  • D. 2 clusters with 2 X-Bricks each

Answer : A

A customer is considering a six brick dispersed cluster using 340U racks. The customer wants advice on racking the InfiniBand switches.
Which recommendation should be provided?

  • A. Install the InfiniBand switches in Rack 1 with a 1U placeholder between the switches.
  • B. Install an InfiniBand switch in Racks 1 and 3 with a 1U placeholder between the X- Bricks.
  • C. Install the InfiniBand switches in Rack 2 with a 1U placeholder between the switches.
  • D. Install the InfiniBand switches in Rack 3 with a 2U placeholder between the switches

Answer : B

A user attempts to create a quorum disk for a host cluster. Volume parameters are:
However, the volume creation fails. What caused the process to fail?

  • A. Quorum disks cannot have an 8kB block size
  • B. Volume size is too small
  • C. Volume name is invalid
  • D. XtremIO volumes cannot be quorum disks

Answer : B

The volume size must be specified in MB, GB, TB, and not in KB.

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

  • A. Compression is not supported
  • B. Deduplication is not supported
  • C. Snapshots of snapshots are not supported
  • D. Volume expansion cannot be reversed

Answer : D

Which values are required to enter a generic workload into the XtremIO Sizing Tool?

  • A. Capacity, IOPs, R/W ratio
  • B. IOPs, I/O size, bandwidth
  • C. IOPs, bandwidth, latency
  • D. Bandwidth, I/O size, latency

Answer : C

IDC outlines a criteria some criteria for selecting a testing tool:
* Generate workloads
* Capture results for analysis:

Throughput -


Latency -
References:http://emc.co/collateral/technical-documentation/h15280-euc-xendesktop- vsphere-xtremio-sg.pdf, page 87 http://info.xtremio.com/rs/xtremio/images/IDC_Flash_Array_Test_Guide.pdf, page 7

As shown in the exhibit, a customers environment is configured as follows:
What should be the host queue depth setting per path?

  • A. 64
  • B. 128
  • C. 256
  • D. 1024

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

What is a characteristic of the XtremIO Snapshot feature?

  • A. Snapshots may be deleted in any order
  • B. Snapshots can only be deleted in reverse creation order
  • C. Only one snapshot may be created or deleted at a time
  • D. Snapshots can be restored

Answer : D

Any copy in the hierarchy tree can be deleted without effecting the parents or children.

When using a 10 TB single X-Brick, what is the minimum amount of data that should be written during the Fill phase of the PoC Toolkit?

  • A. 10 TB
  • B. 15 TB
  • C. 20 TB
  • D. 30 TB

Answer : C

Per IDCs best practices the toolkit fills the array 2x.

A customer has purchased a two X-Brick XtremIO array with a physical XtremIO
Management Server (XMS). The customer plans to use all Fibre Channel connectivity in the environment.
What are the physical connectivity requirements for the cluster?

  • A. 1 Copper Ethernet connection, 4 Fibre Channel Optical connections
  • B. 3 Copper Ethernet connections, 8 Fibre Channel Optical connections
  • C. 4 Copper Ethernet connections, 16 Fibre Channel Optical connections
  • D. 5 Copper Ethernet connections, 8 Fibre Channel Optical connections

Answer : B


References:http://www.aecl.com/AECWeb/media/Assets/PDF/h12451-xtremio-4-system- specifications-ss.pdf

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Total 67 questions