EMC EMC Certifications E20-555 Questions & Answers

• Question 151:

  An existing customer has two NAS systems providing NFS storage in their main datacenter - one is an Isilon cluster and the second is an array from another vendor. Both systems are four years old, and the customer would like to consolidate the storage into a single solution. According to the customer, both systems support identical workloads with similar performance and utilization, and they want the new solution to support 50% performance growth.

  Which method can model the workload requirements, and what multiplier will capture the requirements for the new solution?

  A. Use isi statistics protocol, and multiply by 3

  B. Use isi statistics drives, and multiply by 1.5

  C. Use isi statistics query, and multiply by 2

  D. Use isi statistics system, and multiply by 3

  Correct Answer: A

• Question 152:

  A customer plans to replace an existing array that is supported by the MiTrend Workload Profile Assessment (WPA) service. You receive performance data from the customer and run a WPA report that shows the array has 50TB of usable capacity.

  In discussions with the customer, you learn the content is comprised of four million 6MB files and 400 million 64KB files. The customer explains they have a small budget and very limited rack space available in their datacenter. Performance is not a concern because the files are rarely accessed.

  Which configuration provides the needed usable capacity using N+2:1 protection, and requires the least amount of rack space?

  A. 3 x NL400 nodes with 2TB Drives

  B. 3 x X400 nodes with 1TB Drives

  C. 5 x X200 nodes with 1TB Drives

  D. 6 x X200 nodes with 1TB Drives

  Correct Answer: A

• Question 153:

  Refer to the exhibit.

  

  You are analyzing a customer's existing Isilon environment using InsightIQ in order to expand the cluster. When examining the protocol data, you see the output as shown. What does the data tell you about the workload?

  A. It is mostly sequential reads

  B. It uses large read requests

  C. It is metadata intensive

  D. It contains mostly random writes

  Correct Answer: C

• Question 154:

  Your customer has an existing Isilon cluster with seven X200 nodes. The cluster is used to store home directories and departmental shared folders. They are planning to deploy a new application that generates small block, synchronous writes.

  Which OneFS 7 capability can help reduce latency for the new workload?

  A. Endurant Cache

  B. L2 Cache

  C. Solid State Drives

  D. Prefetcher

  Correct Answer: A

  Reference: http://isilonblog.emc.com/diving-deeper-into-isilon-onefs-7-0/ (performance, third para)

• Question 155:

  You are sizing an Isilon Cluster for a new customer. Analyzing their workflow, you determine that they have a small block random read workload.

  What is the most important factor to consider when sizing this solution?

  A. Headroom

  B. IOPS

  C. Latency

  D. Bandwidth

  Correct Answer: B

• Question 156:

  Your customer is a major metropolitan newspaper. Your previous discussion centered on their storage requirements, and you asked them some of the Top Ten questions.

  They responded: "Well, it's not the prettiest or most high-tech solution...we use Secure FTP (SFTP) to upload the stories and images and put them in a workflow that formats them for printing in the newspaper." "What really worries us is the fact that our Storage Array from your competitor is going out of maintenance in 120 days, and they are dropping support for Secure FTP. This isn't even considered in our D/R Plan. Do you have a better solution with Isilon?"

  Which top 10 questions led to this information?

  A. How much capacity are you looking for? What applications access this storage? What risks are there in your current infrastructure?

  B. What is your network infrastructure like? How many Storage Fabrics do you have? What is your Disaster Plan for the Newspaper?

  C. What does your infrastructure look like? What applications access this storage? What protocols and version number?

  D. What filesystems, SMB, NFS, or other are you using? What does your infrastructure look like? How do you manage your File Systems?

  Correct Answer: D

• Question 157:

  You have had several meetings with an existing EMC VMAX customer. They have agreed that they would like to review an initial Isilon Solution for unstructured data used by the Product Development Team. All production is managed through a Global Enterprise Resource Planning system based in Germany. They require 600TiB of usable capacity. The File System must be accessible from Windows and Linux High-End Workstations. The files are generally not accessed after 120 days, and they would like automated tiering.

  Which questions about architectural integration will impact the solution design?

  A. • What Enterprise Resource Planning platform are they using in manufacturing?

  •

  What is their Recovery Point Objective?

  •

  What is their Archival Strategy?

  B. • How many data centers do they have?

  •

  Will their Network Infrastructure support implementing Isilon?

  •

  What Enterprise Resource Planning platform are they using in manufacturing?

  C. • How many clients will access the File System?

  •

  Will their VDI clients access the Isilon Cluster?

  •

  What is the DR plan for the ERP System?

  D. • What non-sizing-specific factors in the customer's environment could impede integration of the Isilon solution?

  •

  What applications are they using?

  •

  What are your priorities among performance, scalability, or availability?

  Correct Answer: C

• Question 158:

  You meet a customer for the first time. They explain that their current environment for NAS does not meet their needs. You want to make sure that Isilon is a good fit for their needs. What would be a good prequalifying question to ask?

  A. Where will the data center be installed?

  B. How many concurrent clients are accessing your NAS?

  C. How many users are in your Directory Services?

  D. Are you currently using a UPS for your main power source?

  Correct Answer: B

• Question 159:

  You have been invited to meet with the Social Media and Marketing Department and gather requirements for a potential File System Project. They primarily use CIFS and are considering deploying a Hadoop cluster to analyze customer demographic data. The Senior Systems Engineer thinks they will need 2PB of usable capacity.

  What would you do to gain an understanding of the customer's environment to qualify and develop the opportunity?

  A. Create a cluster configuration specifying HDFS, NFS, and CIFS protocols; select 19 x X400 nodes with 144TB per node, and Enhanced Support

  B. Request the Windows Systems Administration Team run a PerfMon analysis on the Marketing Servers, consider adding 75 x 3TB drives to your VNX 5500, and contact the DBA Team for their help

  C. Ask them to identify how the current data is accessed, where the data is accessed from, and who is accessing the data

  D. Send the Social Media Team a sizing and features spreadsheet to complete; download the OneFS Architectural White Paper for them, and create a Logical System diagram in Visio

  Correct Answer: B

• Question 160:

  When an Isilon SyncIQ replication job completes, how many SnapshotIQ policies can be created on a target cluster directory?

  A. 1

  B. 2

  C. 3

  D. 4

  Correct Answer: D