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Dell E20-526 Exam Practice Questions (P. 5)

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Question #21

Refer to the exhibit.
A customer has a VMware Horizon View environment with the following characteristics:
✑ One X-Brick XtremIO cluster
✑ 100% read during a boot storm
8K read/writes

What is the maximum recommended number of VDIs the XtremIO cluster can support during a boot storm?
  1. A
    1625
  2. B
    1833
  3. C
    3250
  4. D
    5094

Correct Answer:
A
EMC estimates that 150 IOPS per desktop is required in a boot storm. As per table the recommended number of VDIs then is 243,831/ 150, which equals 1625.
References:
https://www.emc.com/collateral/white-papers/h14279-wp-vmware-horizon-xtremio-design-considerations.pdf
, page 32

Question #22
You have worked with a customer to successfully evaluate their existing server environment using the MiTrend data analysis tool. You have collected the resulting reports and aggregated the data set. You determine the customers application workload generates a 50:50 read/write ratio with an average of 500K IOPs during peak business hours.
Which recommended XtremIO model meets the customers needs?
  1. A
    Starter X-Brick cluster
  2. B
    Single X-Brick cluster
  3. C
    Two X-Brick cluster
  4. D
    Four X-Brick cluster

Correct Answer:
D

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 #23
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?
  1. A
    Fixed AP
  2. B
    Most Recently Used
  3. C
    Fixed
  4. D
    Round Robin

Correct 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/

Question #24
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

Correct 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 #25
Based on XtremIO best practice, which byte sector size should be used for volumes hosting Oracle database files?
  1. A
    256
  2. B
    512
  3. C
    1024
  4. D
    4096

Correct Answer:
D
Architecting a database on an All Flash Array (AFA) like EMCs XtremIO is best done by reviewing practices to optimize I/O performance. One consideration is the use of Advanced Format and how it impacts the performance of the database Redo logs. Advanced Format refers to a new physical sector size of 4096 bytes
(4KB) replacing original 512 byte standard.
References:
https://community.emc.com/community/connect/everything_oracle/blog/2014/07/18/xtremio-best-practices-advanced-format-512e-and-native-modes

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