EMC E20-880 Online Practice Questions and Exam Preparation

EMC E20-880 Online Questions & Answers

• Question 121:

  Click the calculator icon in the upper left-hand corner.

  An application generates 500 random 8 kB IOPS with a R/W ratio of 3:1. An asynchronous mirror is started on the application LUN. The update cycle is configured to be 30 minutes, and updates take 15 minutes to complete. Assume that the

  data rate is constant.

  What is the minimum space that should be configured for the Reserved LUN Pool on the secondary VNX?

  A. 879 MiB
  B. 7,032 MiB
  C. 14,064 MiB
  D. 16,250 MiB
  B. 7,032 MiB

• Question 122:

  A company needs to create clone LUNs on a VNX storage system. These LUNs will be used by Replication Manager to back up a Microsoft Exchange server database and log LUNs. Where must the clone LUNS be created to have the least impact on the Exchange servers?

  A. In a RAID Group shared with another application
  B. In the same RAID Group as the Exchange databases
  C. In the same RAID Group as the Exchange logs
  D. In their own RAID Group
  A. In a RAID Group shared with another application

• Question 123:

  You designed the disk layout on a VNX storage system for a large client. They have a very large amount of basic file data consisting of Word documents and text files. The data needs to be accessible but sits for long periods of time without

  activity.

  You decided to place this data on a thin LUN and compress it to maximize capacity. The client is concerned about how much capacity they will reclaim with compression.

  Based on the data that is going to be placed on the compressed LUN, what compression ratio will the client typically see?

  A. 2:1
  B. 3:1
  C. 4:1
  D. 8:1
  A. 2:1

• Question 124:

  A customer asks about the High Bandwidth option for a data warehousing application. The customer would like to know the benefits of implementing this feature. How do you respond?

  A. Increased queue depth and increased stripe element size
  B. Symmetric Active/Active and increased queue depth
  C. Increased Full Stripe Writes (FSW)
  D. Increased random, small-block read performance
  A. Increased queue depth and increased stripe element size

• Question 125:

  Your customer is operating a payment processing application on a Windows Server cluster with the back- end Oracle databases running on Oracle Enterprise Linux (OEL). Both the application and database environments have been

  presented storage from the customer's VNX solution.

  Your customer reports less than optimal performance for their online payment processing application. While utilizing IOSTAT, utlbstat and utlestat, a high load on the buffer cache and I/O system performance issues are found on the database servers.

  What is the most likely problem?

  A. Redo logs are too small
  B. High Amounts of Recursive (SYS) SQL
  C. Long Full Table Scans
  D. Shortage of rollback segments
  A. Redo logs are too small

• Question 126:

  You received a call from a customer asking to help troubleshoot why they cannot select dvols using MVM from their remaining pool LUNS to create a stripe volume. What could be a reason for this?

  A. All Thick LUNs must be used first
  B. All Thin LUNs must be used first
  C. LUNs must not exceed 18 TB in size
  D. LUNs must be on the same SP
  A. All Thick LUNs must be used first

• Question 127:

  Your customer has recently purchased a VNX to host their three Oracle RAC database environments and automated payment processing application. The RACs and application are differentiated as follows: ORA- PROD, ORA-STAGE, ORADEV, APP-PROD, APP-STAGE, and APP-DEV.

  The customer has provided you with their Enterprise Storage Policy (ESP) and is requesting that you adhere to this policy when architecting their new VNX solution. The ESP states the following as it relates to Oracle database storage requirements:

  All LUNs must be configured as raw devices

  All LUNs must be managed using ASM

  No fewer than two LUNs per ASM disk group

  No more than one database per RAC per RAID Group

  No more than three databases per RAID Group

  All data LUNs must be 1000 GiB RAID 5

  All FRA LUNs must be 500 GiB RAID 1/0

  No more than eight total disks per RAID Group

  No fewer than four disks per RAID Group

  

  Based on the ESP, and assuming ORA-PROD has six instances, what is the minimum number of disks required?

  A. 4
  B. 8
  C. 12
  D. 24
  B. 8

• Question 128:

  How do you change the Allocation Owner of a FAST VP pool LUN to match the Default SP owner?

  A. The LUN must be migrated to a new LUN with the desired Allocation Owner.
  B. Trespass the LUN to the SP of the desired Allocation Owner.
  C. Change the Allocation Owner in the LUN properties within Unisphere.
  D. Run naviseccli lun -owner to change the Allocation Owner.
  A. The LUN must be migrated to a new LUN with the desired Allocation Owner.

• Question 129:

  What can be concluded from the exhibit about the I/O profile of LUN 600?

  A. Read access is random.
  B. I/Os are too big for prefetch.
  C. Read access is sequential.
  D. Reads are being prefetched.
  A. Read access is random.

• Question 130:

  You are being asked to help a customer that is having issues with their new data warehouse application that they have just connected to their existing VNX.

  The administrator has created a 2 TB pool LUN on 8 NL-SAS drives in a 6+2 raid 6 configuration. The customer does not have the budget to purchase more hardware this quarter but does have a mixture of SAS and NL-SAS drives you can

  use.

  Which action would you recommend to the customer?

  A. Move to SAS drives.
  B. Move to NL-SAS drives in a 14+2 Raid 6.
  C. Leave the data as is
  D. Enable FAST Cache on the pool.
  A. Move to SAS drives.