E20-880 Online Practice Questions and Answers

Your customer has a single threaded legacy application with a sequential write workload. They are currently performing a storage technology refresh. They ask you to architect a solution using VNX systems configured with NL-SAS, SAS and Flash drives.

Which drive and RAID protection should they use for the legacy application?

A. SAS drives; RAID 5 protection

B. Flash drives; RAID 5 protection

C. SAS drives; RAID 6 protection

D. NL-SAS drives; RAID 6 protection

You are in a design session with a customer of an ESXi 5.0 cluster. One of the stakeholders inquires about vNUMA. By default, what is the minimum number of CPUs in a vNUMA enabled environment?

A. More than 4 vCPU

B. More than 8 vCPU

C. More than 12 vCPU

D. More than 16 vCPU

A LUN has the following settings:

Prefetch TypE. Variable

Prefetch Multiplier: 4

Segment Multiplier: 4

Prefetch DisablE. 4097

Write-aside SizE. 2048

Maximum Prefetch: 4096

What is largest write that will be cached?

A. 1 MB

B. 2 MB

C. 4 MB

D. 512 KB

You have a VNX customer who is concerned that you created multiple LUNs within the same Flash drive RAID group and believes this will create disk contention with reduced performance.

What is the reason to create the Flash drive LUNs in this manner?

A. Flash drives have multiple internal channels which can service concurrent I/O's

B. The Flash drive RAID group was carved for both FAST Cache and Flash drive file pool use.

C. Flash drive RAID group drives used for file must be created as small size LUNs and concatenated

D. Flash drives have significantly quicker response times and therefore disk contention is not an issue

A customer created a Thin LUN, enabled compression on a Pool, and installed their email application environment. The application is showing poor performance. Which workload characteristic of the application would produce poor access times on a compressed LUN?

A. Small random writes

B. Small random reads

C. Sequential reads

D. Uncompressed or host based data

A customer decides to oversubscribe a switch port group to optimize switch usage. What factors need to be considered?

A. Bandwidth, IO and response times

B. Bandwidth, response time and utilization

C. Bandwidth, IO and transfer rates

D. Bandwidth, transfer rates and utilization

Refer to the Exhibit.

A VNX Administrator is monitoring the workload and is considering adding a few flash drives. Based on the workload shown in the illustration, what would be the outcome of adding these drives?

A. Reduces the moderate skew.

B. Reduces the heavy skew.

C. Reduces the low skew.

D. Has no effect on skew.

Refer to the exhibit.

Which process is illustrated in the exhibit?

A. FAST Cache warmup

B. FAST VP slice relocation

C. FAST VP policy change

D. FAST Cache writeback