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

Which tool provides recommendations on how query processing performance can be improved by modifying physical design structures such as indexes, indexed views, and partitioning?

A. Tuning Advisor

B. Query Editor

C. SQL Activity Monitor

D. Performance Monitor

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

You are conducting an analysis of a Celerra system to migrate the data to a new VNX Unified storage system. You want to measure the current connections for the CIFS/NFS protocol. Which "server_stats" statistic type would you use to get the desired information?

A. Fact

B. Counter

C. Element

D. Correlated Set

A customer recently added a large number of new users to their VNX for Block storage system. They now complain that the system is slow. You have been asked to fix this problem. Their configuration uses traditional LUNs exclusively. They have a number of Flash drives that are currently unused. Analysis of their application environment shows that several LUNs have skew > 90%.

Which technology would you implement to solve their performance problem?

A. FAST Cache

B. FAST VP

C. Flash RG

D. Pool LUNs

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 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

A customer has configured replication between Data Movers on two VNX arrays. In order to provide maximum network performance for the replication process, the customer has configured link aggregation on each Data Mover to provide two Gigabit Ethernet ports per Data Mover to the replication process. While reviewing performance reports the customer notices the replication network is using less than 30% of the available bandwidth.

What change will increase the efficiency of the replication network bandwidth?

A. Add ports to the aggregated links on each Data Mover.

B. Increase FAST Cache capacity on the target VNX.

C. Add spindles to the disk group hosting the destination SavVol.

D. Configure multiple Replicator sessions between the source and target VNX.

Refer to the exhibit.

A single small IO spans 2 physical disks.

What will the disk crossing counter increase by?

A. 1

B. 2

C. 4

D. 5

A VNX Administrator is analyzing storage workload distribution. The administrator is trying to determine if the array has an acceptable skew. Based on the workload in the illustration, what could be concluded?

A. 95% of the workload is distributed over 5% of the capacity, for a skew of 95%.

B. 10% of the workload is distributed over 90% of the capacity, for a skew of 80%.

C. 80% of the workload is distributed over 20% of the capacity, for a skew of 20%.

D. 90% of the workload is distributed over 50% of the capacity, for a skew of 10%.