E20-880 Online Practice Questions and Answers

A company has added a large number of users to a VMware VDI deployment. The users are complaining that the system (VNX-Block) is slow, especially when they start their shift. You have been tasked to provide an economical solution. Which technology would you use to improve performance?

A. FAST Cache

B. FAST VP

C. FAST

D. Fast VPN

A clone source LUN is 512 GiB in size. It performs 500 random 8 KiB IOPs with a 3:1 R/W ratio. As part of ongoing testing, the clone is fractured for 10 minutes and then resynchronized. The testing is performed every hour.

How much data (to the nearest GiB) is read from the source LUN as part of the resynchronization process?

A. 5 GiB

B. 9 GiB

C. 18 GiB

D. 36 GiB

Your customer has a VNX array with FAST Cache licensed with a single storage pool created.

They currently use the Storage Pool for their general production environment, but would like you to design an environment that will support their Exchange 2010 deployment. There is sufficient free space in the Storage Pool to accommodate

their Exchange storage requirements.

Based on EMC best practice guidelines, which design would you recommend?

A. Enable FAST Cache on the existing Storage Pool. Place the database volumes on the existing Storage Pool. Create a second storage pool for the log volumes.

B. Place the database and log files on the existing Storage Pool. Enable FAST VP. Increase the array Write Cache value.

C. Create a new Storage Pool. Place the database and log files on this new Storage Pool. Enable FAST VP.

D. Enable FAST Cache on the existing Storage Pool. Place the log volumes on the existing Storage Pool. Create a second storage pool for the database volumes.

You are designing a VNX for Block solution for a customer. The application is a high throughput OLTP and will require the use of a volume manager to combine multiple LUNs across multiple SPs. Each of the component LUNs resides on a RAID 5 (4+1) RAID Group. Based on best practices, which volume manager stripe element size would you recommend?

A. 64 KB

B. 128 KB

C. 256 KB

D. 1024 KB

A customer has placed their user data, consisting of text, Word, and Excel files, on a thin LUN created from an existing pool. The thin LUN is reaching capacity and cannot be expanded over the pool due to capacity constraints on the pool. What is the best way for the customer to reclaim some of the capacity on the thin LUN?

A. Compress the thin LUN

B. Defragment the thin LUN

C. Migrate the data to a new LUN on a new pool

D. Delete old files

Your customer is migrating from a VNX to a VNX with MCx. Based on their workload, 16 KB constant prefetch sizes were configured on the VNX to improve performance. The customer wants to implement the same configuration on the VNX with MCx.

What is the smallest prefetch size on VNX with MCx?

A. 64 KB

B. 8 KB

C. 16 KB

D. 32 KB

What is a restriction for the High Bandwidth option for classic LUNs?

A. Only supported for RAID 5 4+1 .

B. Recommended for FLASH drives.

C. Limited to VNX File OE LUNs.

D. Only supported for RAID1/0 4+4.

Your customer is interested in deploying XtremeSF and XtremeSW together on multiple hosts that will be attached to their new VNX. What would you discuss with your customer?

A. XtremeSF will only accelerate reads while writes will be passed through.

B. XtremeSF will pass though all reads and writes.

C. XtremeSF will only accelerate writes while reads will be passed through.

D. XtremeSF and XtremeSW cannot be used together.

A customer's database resides on a RAID 5 Pool with SAS drives. Which best practice should be followed to optimize Reserved LUN Pool disk performance?

A. Use equal size thin LUNs from the same Pool as the database

B. Use a mix of both SAS and NL-SAS disks from the same Pool as the database

C. Use only SAS disks on dedicated RAID Groups

D. Use only NL-SAS II drives on dedicated RAID Groups

Refer to the exhibit.

A pre-MCx VNX has three SAS DAEs configured with eight 4+1 RAID 5 Groups and six Hot Spares as shown in the exhibit. All RGs are unused except for RG 0, which contains the Control LUNs. All LUNs except for those in RG 0 are the same size.

Which dvols will be selected for file system creation using Automatic Volume Management System-defined pools?

A. dvols 11, 13, 20, and 22

B. dvols 9, 12, 14, and 18

C. dvols 7, 11, 17, and 25

D. dvols 9, 10, 11, and 12