Skip to main content

E20-526 Real Exam Questions

XtremIO Solutions and Design Specialist for Technology Architects

67 questions available · Page 1 of 7

Updated Exam DumpsVerified AnswersPass Guarantee

Get Complete Exam Dumps
Question 1 Single choice

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

  1. A

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

  2. B

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

  3. C

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

  4. D

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

Show answer and explanation

Correct answer: C

Explanation

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 2 Single choice

A user attempts to create a quorum disk for a host cluster. Volume parameters are: Size = 1000 kB
Name 1MB_Vol

However, the volume creation fails.

What caused the process to fail?

  1. A

    Quorum disks cannot have an 8kB block size

  2. B

    Volume size is too small

  3. C

    Volume name is invalid

  4. D

    XtremIO volumes cannot be quorum disks

Show answer and explanation

Correct answer: B

Explanation

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

Incorrect Answers:
D: Quorum disks on XtremIO
The SAN Volume Controller cluster will select disks that are presented by the XtremIO storage system as quorum disks. To maintain availability for the cluster, ideally each quorum disk should reside on a separate disk subsystem.

The quorum device can be any disk device that is shared between two or more nodes. EMC Symmetrix, VNX series, or XtremIO devices are commonly used for this purpose.

References:
https://vcdx133.com/2014/09/14/emc-xtremio-provisioning-a-lun/

Question 3 Single choice

A customer has recently deployed an XtremIO 20 TB two X-Brick cluster to run an existing instance of Oracle RAC previously leveraging VNX for back-end storage. The application environment uses a block size of 1 MB. Multiple tables are in use with the PARALLEL_DEGREE_POLICY variable set to AUTO.

The customer wants your help with tuning the DB_FILE_MULTIBLOCK_READ_COUNT parameter for best performance with XtremIO.

Which values should be recommended for tuning the DB_FILE_MULTIBLOCK_READ_COUNT parameter in the Oracle RAC environment?

  1. A

    8 or 16

  2. B

    24 or 32

  3. C

    64 or 128

  4. D

    256 or 512

Show answer and explanation

Correct answer: C

Explanation

Oracle Database performs I/O on data files in multiples of the database block size (db_block_size), which is 8KB by default. The default Oracle Database block size is optimal on XtremIO. XtremIO supports larger block sizes as well. In the case of multiblock I/O (e.g., table/index scans with access method full), one should tune the Oracle Database initialization parameter db_file_multiblock_read_count to limit the requests to 128KB.
Therefore, the formula for db_file_multiblock_read_count is:
db_file_multiblock_read_count = 128KB / db_block_size

In our case the block size is 1 MB, so the formula db_file_multiblock_read_count is 1 MB/ 8KB = 1024/8 =
128

References:
https://www.emc.com/collateral/white-papers/h13497-oracle-best-practices-xtremio-wp.pdf,
page 21

Question 4 Single choice

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?

  1. A

    Delivers SaaS
    Centralized management and monitoring Chargeback and billing capabilities

  2. B

    Chargeback reporting capability
    Centralizes reactive monitoring capability
    Policy-driven configuration management

  3. C

    Automatically grows storage volumes
    Slows growth of data Centralized auto-deletes of aging files

  4. D

    Creates virtual storage pools
    Automates disaster recovery
    Replaces chargeback capabilities

Show answer and explanation

Correct answer: A

Explanation

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 5 Single choice

What is considered typical performance for an XtremIO single X-Brick cluster?

  1. A

    Small block writes: 200k-250k IOPs. Large block reads: up to 2.5 GB/s

  2. B

    Small block writes: 200k-250k IOPs. Large block writes: up to 2.5 GB/s

  3. C

    Small block reads: 200k-250k IOPs. Large block writes: up to 2.5 GB/s

  4. D

    Small block reads: 200k-250k IOPs. Large block reads: up to 2.5 GB/s

Show answer and explanation

Correct answer: C

Explanation

Choose an EMC XtremIO system and scale out linearly by adding more XtremIO X-Bricks.

References:
https://store.emc.com/en-us/Product-Family/EMC-XtremIO-Products/EMC-XtremIO-All-Flash-Scale-Out-Array/p/EMC-XtremIO-Flash-Scale-Out

Question 6 Single choice

How can REST API commands be run to manage and monitor an XtremIO cluster?

  1. A

    From the REST API CLI built into each X-Brick

  2. B

    From the REST API GUI built into each X-Brick

  3. C

    From a third-party GUI

  4. D

    From the REST API tab in the XMS GUI

Show answer and explanation

Correct answer: C

Explanation

The XtremIO's RESTful API allows HTTPS-based interface for automation, orchestration, query and provisioning of the system. With the API, third party applications can be used to control and fully administer the array.

Normally you would access the API using some form of programming/scripting language, such as Python or Perl. However for the purposes of learning or testing concepts there are a number of tools that work better, such as HTTPRrequester and curl.

* Curl is a command-line tool that exists in all Linux distributions, and is available for most other Unix OSes as well as Windows. To use curl to access XtremIO you'll need to pass it a few options, such as the username/password to access the array (any valid account on the XtremIO XMS will work), the URL of the API, and potentially a few options such as -k to tell curl not to validate the SSL certificate (presuming you don't have a valid certificate installed), and -s (silent) to stop curl displaying it's progress as it downloads the response.

* HTTPRequester is a browser extension that is available for both Chrome and Firefox.
As with for curl, you'll need to provide a username/password, which is done by clicking on the "Authentication..." box, which adds two boxes below the URL for the username and the password.

References:
https://blog.docbert.org/using-the-xtremio-rest-api-part-1/

Question 7 Single choice

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?

  1. A

    8 kB

  2. B

    63 kB

  3. C

    256 kB

  4. D

    4 MB

Show answer and explanation

Correct answer: C

Explanation

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 8 Single choice

A customer has an existing Oracle environment they are considering moving over to XtremIO from VMAX for improved performance. The customer wants to know the expected deduplication and compression savings they can achieve with XtremIO.

Which tool is appropriate for conducting this assessment?

  1. A

    EMC Backup Tool

  2. B

    EMC Storage Tool

  3. C

    XtremIO Sizing Tool

  4. D

    EMC MiTrend Tool

Show answer and explanation

Correct answer: D

Explanation

MiTrend has been available for EMC Employees and Partners for years, but it's a valuable tool that Customers can take advantage of also. And the price is awesome. It's FREE !

Use it for VNX, Clariion, VMAX, and many more.

References:
http://www.pragmaticio.com/2014/11/mitrend-self-service-performance-analysis-for-emc-vnx/

Question 9 Single choice

You have been asked to design an XtremIO storage array solution that will be used for two large applications workloads. One overload will generate approximately 150,000 write IOPs with an average 4 kB I/O size. The second write workload will have an average I/O size of 128 kB and will generate approximately 2 GB/s of throughput.

At a minimum, how many X-Bricks are needed in a single cluster to meet this requirement?

  1. A

    2

  2. B

    4

  3. C

    6

  4. D

    8

Show answer and explanation

Correct answer: A

Explanation

Second write workload IOPS = 2 GB/s divided by 128 kB = 2 x 1,073,741,824 / (128 x 1,024) = 16384 IOPs.
Total IOPS required would be 150,000, from the first workload, plus 16384, totaling 166384.

A 2 X-Brick cluster provides 300K Read/write IOPS so it would be adequate.

Storage capacity and performance scale linearly, such that two X-Bricks supply twice the IOPS, four X-
Bricks supply four times the IOPS, six X-Bricks supply six times the IOPS and eight X-Bricks supply eight times the IOPS of the single X- Brick configuration.

Note: Choose an EMC XtremIO system and scale out linearly by adding more XtremIO X-Bricks.

References:
https://store.emc.com/en-us/Product-Family/EMC-XtremIO-Products/EMC-XtremIO-All-Flash-Scale-Out-Array/p/EMC-XtremIO-Flash-Scale-Out

Question 10 Single choice

How many management IP addresses are required on a single XtremIO storage controller?

  1. A

    1

  2. B

    2

  3. C

    3

  4. D

    4

Show answer and explanation

Correct answer: A

Explanation

References:
https://docs.openstack.org/juno/config-reference/content/XtremIO-cinder-driver.html#xtremio-management-ip