EMC Technology Architect E20-880 Questions & Answers

• Question 121:

  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

  Correct Answer: A

• Question 122:

  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 an AVM user-defined pool using specific dvols

  B. Use the system-defined Snapshot pool

  C. Create a user-defined pool using clarsas_R6 as a template

  D. Use the system-defined clarsas_archive pool

  Correct Answer: A

• Question 123:

  Replication Manager (RM) is being used to create replicas for a SQL server installed on VMFS residing on an ESX server. The operations are sent from a separate virtual RM proxy host. However, the RM is not able to successfully create copies.

  What is the most likely cause of the failure?

  A. The RM proxy is unable to connect to the RM Server over port 443.

  B. The RM proxy host is already registered with the RM server.

  C. The RM proxy must be a physical host.

  D. The RM server credentials were not properly entered for the RM proxy.

  Correct Answer: A

• Question 124:

  Seven users are trying to simultaneously read different parts of the same file from their VNX for File storage system. All parts of the file are located on the same physical disk. I/O from each of the users is sent sequentially to the array.

  Which type of I/O workload is likely to be reported by the storage array?

  A. Random I/O

  B. Sequential I/O

  C. Single-threaded I/O

  D. Pre-fetched I/O

  Correct Answer: A

• Question 125:

  During a white board session with your customer you explain the benefit of partition alignment. As an example, you use a 64 K write and explain the difference between a properly aligned partition RAID 5 4+1 and a misaligned partition.

  If the partition is misaligned, how many disk operations will be performed for a RAID 5 4+1 write?

  A. 2

  B. 5

  C. 8

  D. 10

  Correct Answer: C

• Question 126:

  An application generates 1000 random 16 KiB IOPS with a R/W ratio of 4:1. An asynchronous mirror is started on the application LUN. The update cycle is configured to be 20 minutes, and updates take 6 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. 1,125 MiB

  B. 4,500 MiB

  C. 5,625 MiB

  D. 9,000 MiB

  Correct Answer: B

• Question 127:

  A customer has implemented your VNX for File design for a high-performance CAD/CAM application. The design specified several NFS clients, each accessing a single file system in a single-threaded manner. You need to guarantee that each file system resides on an exclusive LUN set.

  Which value would you change?

  A. default_slice_flag

  B. is_greedy

  C. is_dynamic

  D. stripesize

  Correct Answer: A

• Question 128:

  A customer is running a data warehouse server with dual HBAs connected to a SAN . A performance analysis of the server shows high utilization. This server needs to be backed up to a SAN-attached backup device. The customer is concerned about production performance while backing up the data.

  Which solution should be proposed?

  A. Back up the data over a LAN

  B. Perform disk-based backup

  C. Use clones as the backup source

  D. Use direct-attached tape-based backup

  Correct Answer: B

• Question 129:

  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

  Correct Answer: A

• Question 130:

  A customer is using a virtualized environment with a large number of NFS datastores presented from a VNX system. They are experiencing more than expected network traffic on their datastore networks.

  What recommendation would you make to your customer?

  A. Make sure that the NFS and VMKernel traffic is segmented onto different virtual switches.

  B. Ensure that all VMware file systems are thin provisioned to improve NFS write I/O.

  C. Enable NFS write cache for all NFS datastores.

  D. Adjust NFS.ReadBufferSize and NFS.SendBufferSize to 32.

  Correct Answer: A