EMC E20-880 : VNX Solutions Expert Exam for Technology Architects

A VNX customer is using storage pools and FAST Cache to support a mixed workload environment. The mission-critical application is SAP with an underlying MS SQL database. The SQL database has an IO profile that is well suited for FAST Cache. The customer would like to increase the efficiency of FAST Cache while not degrading the performance in any way. Cost is not a consideration. What action should the SE recommend to improve FAST Cache efficiency?

• A. Discuss the benefits of VNX with MCx in regard to FAST Cache and DRAM cache improvements.
• B. Request an EMC Customer Engineer perform a comprehensive health check of the array to determine if any hardware faults exist.
• C. Review the SP Collects and .nar data to determine which pools currently have FAST Cache enabled. Recommend FAST Cache only on pools that generate small to medium random IO.
• D. Review the SP collects and .nar data to determine if the FAST Cache is currently at the maximum supported value. If it is not, recommend adding additional SSDs to FAST Cache.

A customer with an existing VNX for File implementation wants to enable deduplication on a file system, based on the following specifications:
-Idle File System -Number of files: 1 M -Average file size: 50 KiB -Estimated deduplication: 30%
What is the estimated time for initial deduplication?

• A. 20 min
• B. 10 min
• C. 15 min
• D. 5 min

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. Computed
• C. Compound
• D. Element

Your customer is designing a Proof of Concept with SQL Server attached to a VNX. The storage design includes seven LUNs on a RAID Group. The system is generally very heavily loaded, with a particularly high load on the cache. This is a very carefully controlled environment and your customer has asked for assistance in planning the layout of the LUN location on the physical spindles.
Where in the RAID Group would you recommend placing the two heavily used LUNs for a "short-stroked" architecture?

• A. Evenly placed, as non-adjacent as possible
• B. Adjacent to each other at the beginning
• C. Adjacent to each other in the middle
• D. One at beginning and one at the end

A customer with a virtualized environment has asked you to architect a new VNX storage solution utilizing their many NFS datastores. They are also deploying a new Cisco Unified Computing System as their compute base. However, they believe that virtualizing their critical servers may cause network performance concerns because these servers have a very high transaction rate with a CPU bound application.
How would you respond to your customer's concerns?

• A. Their environment will not be compromised by virtualization, but it requires pNFS on the ESXi and VNX systems.
• B. Deploy their environment as architected, with CNA configured for Jumbo frame support, end-toend.
• C. Their environment will not be compromised by virtualization; it can be deployed as architected.
• D. Deploy their environment as architected, and enable DirectPath I/O for their servers.