EMC Technology Architect E20-880 Questions & Answers

• Question 31:

  You are conducting an analysis of a Celerra system to migrate the data to a new VNX Unified storage system. You want to collect statistical information about CIFS file system activity.

  Which "server_stats" statistic type would you use to get the desired information?

  A. Family

  B. Compound

  C. Element

  D. Computed

  Correct Answer: A

• Question 32:

  Your customer is having performance problems on their Linux database servers that are attached to a VNX. You have diagnosed the VNX and found no obvious issues.

  Which utility would the customer use to provide performance reports on host block device activity?

  A. sar

  B. perfstat

  C. perfmon

  D. tcpdump

  Correct Answer: A

• Question 33:

  If the workload graph shows that most of the Storage Processor load is used to support a small amount of data, what could cause this utilization?

  A. heavy skew

  B. low skew

  C. moderate skew

  D. no skew

  Correct Answer: A

• Question 34:

  In reviewing a nar analysis, what does workload skew measure?

  A. How much of the storage is handling the bulk of the workload

  B. The percentage of data that would be demoted from FAST Cache

  C. The distribution of the active data on the backend disks

  D. The percentage of data that has been moved to the Extreme Performance Tier

  Correct Answer: A

• Question 35:

  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.

  Correct Answer: A

• Question 36:

  Which naviseccli performance counter is used to view stripe boundary crossing statistics?

  A. getdisk

  B. getcontrol

  C. getrg

  D. getlun

  Correct Answer: D

• Question 37:

  Click the calculator icon in the upper left-hand corner. An application generates 1000 IOPS with a read/ write ratio of 3:1. What is the difference in disk IOPS between RAID 1/0 and RAID 5 for this workload?

  A. There are 500 fewer IOPS for RAID 1/0

  B. There are 250 fewer IOPS for RAID 5

  C. There are 1000 fewer IOPS for RAID 1/0

  D. They have the same number of IOPS

  Correct Answer: A

• Question 38:

  A customer is creating a new configuration that has 100% sequential reads with very high thread counts. The configuration will be for a test bed which will require no high availability or fault tolerance on failures. What RAID and drive configuration should be recommended?

  A. RAID 0 with SAS Drives

  B. RAID 5 with NL-SAS Drives

  C. RAID 6 with NL-SAS Drives

  D. RAID 3 with NL-SAS Drives

  Correct Answer: A

• Question 39:

  A Customer is creating a new configuration which requires a ratio of 90% reads and 10% writes. The configuration will also need to handle very large I/O sizes. The customer is also concerned about cost and availability of the data. What RAID configuration would meet the customer's requirements?

  A. RAID 6 with NL-SAS Drives

  B. RAID 5 with SAS Drives

  C. RAID 1/0 with SAS Drives

  D. RAID 6 with SSD Drives

  Correct Answer: A

• Question 40:

  A Customer is creating a new configuration which requires a ratio of 10% reads and 90% writes. The configuration will also need to handle very small I/O sizes. The customer is also concerned about the performance of the new drives. What RAID and drive configuration should be recommended?

  A. RAID 1/0 with SAS Drives

  B. RAID 5 with SAS Drives

  C. RAID 6 with NL-SAS Drives

  D. RAID 5 with NL-SAS Drives

  Correct Answer: A