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EMC Isilon Design Specialist Exam for Technology Architects Sample Questions:

1. You have gathered information from your customer about their current NAS environment. They indicated they are having performance and time-out issues with their clients accessing the storage. Currently over 5000 clients are simultaneously accessing the NAS; however, this will double in the next year.
Based on this information, what recommendations for a new Isilon cluster would you give to the customer based on this information?

A) Create a six node X400 cluster today. As additional clients are added, add additional X400 nodes for them.
B) Create a three node cluster today. As more clients are added, add three additional nodes each time for 1000 clients.
C) Create a five node X400 cluster today. As more clients are added, add a Performance Accelerator node for every 1000 clients.
D) Create a seven node X400 cluster today. You will not need to purchase additional nodes as more clients are added.

2. Your customer is moving from a Restaurant/Bar business model to a Restaurant/Casino business model. You are helping architect the upgrade of a current 4-node X200 48 TB Isilon cluster, with 50% utilized for their video surveillance operations.
They want to upgrade from 15 FPS (NTSC) in H.264 codec, with a 15 days retention policy to 30 FPS (NTSC) in H.264 codec, with a 30 days retention policy.
How many nodes of the same type will you need to add in order to meet the required changes and not exceed 70% raw capacity?

A) 16 nodes
B) 12 nodes
C) 4 nodes
D) 8 nodes

3. You have 1000 users for an application that reads and writes files averaging between one and four MB in size. Each user requires 24 MB of RAM. You want to add another 1000 users for this application, and in preparation for them, you run the isi statistics command. You discover that the average CPU utilization is 20%; aggregate throughput averages 700 MB/s and the disk QueueD average is 1.5. Your cluster currently has five X200 (12 GB RAM, 1 TB drive) nodes, uses N+2:1 protection and 1 GigE networking.
What should you do to accommodate the next 1000 users?

A) Upgrade each X200 node to a total of 24 GB of RAM.
B) Upgrade two of the 1 GigE NICs to 10 GigE on each node.
C) Add five additional X200 (12 GB, 1 TB drive) nodes
D) Add five A100 (24 GB RAM) accelerator nodes.

4. Refer to the exhibit.

A customer calls you and asks if you could come by and interpret their InsightIQ data. You see that namespace reads are 63% of the work load.
What would you recommend to help this cluster's namespace performance?

A) Add S-Series nodes
B) Turn off write cache
C) Add A-Series nodes
D) Add SSDs

5. You are reviewing an opportunity with a trusted advisor. You both discover gaps in the initial solution design.
Each iterative discussion with the customer helps you define the solution better. The documents produced capture the customer's requirements.
What else needs to occur to refine the sizing considerations?

A) Provide the CIO with the findings and gain commitment to a Proof of Concept.
B) Review you assumptions and ask the customer what business issue you're solving.
C) Validate the Workflow Profile Assessment and test the solution against your findings.
D) Complete your Solution Design Document and forward to EMC consulting.

Solutions: