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EMC Isilon Design Specialist Exam for Technology Architects Sample Questions:

1. 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.
Which storage capacity would be the best suited to meet the required changes and utilize 65-75% capacity?

A) 80TB
B) 50TB
C) 140TB
D) 110TB

2. A customer has grown 2 PB in the last year. The cluster performs well most times of the day, but occasionally during the day, the customer notices a decrease in performance. You have been told that 'tree-deletes' are taking too long and can only be run on weekends.
What would you recommend to speed up the 'tree-deletes'?

A) Add 20% more nodes to the cluster to help with degraded performance.
B) Use an A100 node for added CPU performance to help with 'tree-deletes.'
C) Add an SSD node tier for metadata to account for at least 2% of RAW capacity
D) Add an SSD tier for metadata, ensuring all nodes have SSDs.

3. When conducting high-level interviews with stakeholders of a project, what are the key questions that should be asked?

A) What does your network architecture look like?
Do you have existing NAS infrastructure?
Do you have 10Gb or 1Gb ethernet?
Which applications will access this storage?
B) How much usable storage are you looking for? What client OS will access this storage? Which applications will access this storage?
C) Which backup application is in use today?
What is your change rate?
How many clients will connect to the cluster?
D) Who are the application owners?
How much usable storage is needed?
What applications will be accessing the storage?
How many users are in your Active Directory?

4. -- Exhibit -
We have been engaged by a research hospital to help upgrade their Isilon installation. They currently have 12 previous generation Isilon nodes with 200TB of capacity and run on a 1Gbps network. They currently have 6 Illumina Hi-Seq Sequencers and an HPC cluster to process data. They would like to expand Isilon to 2PB of active data and 1PB of archive data. They use a third party data and metadata management service (IRODs) to stage data for analysis. The Isilon cluster is mainly used for analysis work with the HPC cluster.
-- Exhibit -
Before making any changes, the customer would like a graphical presentation of their existing array performance to present to management.What is the best tool to gather this information?

A) tcpdump
B) netstat
C) InsightIQ
D) isi_netlogger

5. -- Exhibit -
We have been engaged by a research hospital to help upgrade their Isilon installation. They currently have 12 previous generation Isilon nodes with 200TB of capacity and run on a 1Gbps network. They currently have 6 Illumina Hi-Seq Sequencers and an HPC cluster to process data. They would like to expand Isilon to 2PB of active data and 1PB of archive data. They use a third party data and metadata management service (IRODs) to stage data for analysis. The Isilon cluster is mainly used for analysis work with the HPC cluster.
-- Exhibit -
The customer has a limited budget. What would be the best price/performance solution for their active data?

A) 14 X-Series nodes with no SSD drives and 96GB of RAM
B) 14 NL-Series nodes with 24GB of RAM
C) 17 X-Series nodes with SSD drives and 48GB of RAM.
D) 12 X-Series nodes with no SSD drives and 24GB of RAM

Solutions: