E20-880 by EMC Actual Free Exam Q&As

Question 1

During decompression with default settings, if the pool becomes too full, decompression will be paused but host I/O can continue. At what percent full will host I/O be terminated to the LUN?

A. 91% B. 100% C. 80% D. 98%

Discussion 0

Correct Answer: D Vote an answer

Question 2

A customer has recently virtualized an Oracle database on a VNX system. Initially, performance was satisfactory. Now, with more usage there is some performance degradation. You used Analyzer to check the backend and did not see any problems.
Which VMware best practice would be easiest to resolve the issue?

A. Use a paravirtualized SCSI adapter B. Align VMFS properly C. Use Oracle ASM D. Create dedicated datastores to service workloads

Discussion 0

Correct Answer: A Vote an answer

Question 3

A VNX for File administrator is implementing SnapSure for backup staging. The administrator is concerned that this solution might affect the Production File Systems (PFS). You are asked to describe the possible performance impact of SnapSure checkpoints on the PFS.
How would you respond?

A. Checkpoints have no performance impact on the PFS. B. PFS read activity is not affected by Checkpoints. C. COFW will affect PFS write performance. D. COFW will affect PFS read performance.

Discussion 0

Correct Answer: C Vote an answer

Question 4

You are designing a VNX for File implementation for a customer. SnapSure Checkpoints will be used for both backup staging and file restore. The customer would like to place the SavVols on specific disks, but is concerned that this might make administration difficult.
What would you recommend?

A. Create a user-defined pool using clarsas_R6 as a template B. Use the system-defined Snapshot pool C. Create an AVM user-defined pool using specific dvols D. Use the system-defined clarsas_archive pool

Discussion 0

Correct Answer: C Vote an answer

Question 5

An application generates 500 random 8 KiB 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. 14,064 MiB B. 16,250 MiB C. 879 MiB D. 7,032 MiB

Discussion 0

Correct Answer: D Vote an answer

Question 6

A VNX block-only customer is requesting a performance evaluation of their array. The storage administrator asks you what files you will need to perform the assessment. The customer does not have Analyzer licensed. How do you respond?

A. Request the .nar files and server_stats output B. Request the CCC output from the collect_config script C. Request the .naz files and SP collects D. Request the .nar files and SP collects

Discussion 0

Correct Answer: C Vote an answer

Question 7

Which action would be most effective in reducing the performance impact of a Snapshot on a Source LUN?

A. Increasing the Snapshot chunk size B. Using faster disks for the Reserved LUN Pool C. Increasing the Snapshot write-aside size D. Using faster disks for the Source LUN

Discussion 0

Correct Answer: D Vote an answer

Question 8

When designing a VNX Block Pool layout for a high performance application, how should LUN ownership be assigned?

A. Avoid assigning any LUNs to the most utilized SP until each SP has the same number of LUNs B. All LUNs in the pool should be owned by the same SP C. LUNS should be evenly assigned between each SP D. The LUNs should be distributed so that the majority is owned by the least utilized SP first

Discussion 0

Correct Answer: B Vote an answer

Question 9

You are migrating a database on NFS to a new VNX. The customer notes that you have designated only SAS drives for the database transaction logs and not any Flash drives. The customer believes that the Flash drives will greatly increase transaction log performance.
What is the reason that you chose SAS drives?

A. Databases cannot sustain multiple concurrent I/Os. B. SAS drives are just as efficient for sequential I/O C. The transaction logs vary in size and can be sequential or random I/O D. Flash drives are most efficient for small block random I/O

Discussion 0

Correct Answer: B Vote an answer

EMC VNX Solutions Expert Exam for Technology Architects - E20-880 Exam Practice Test