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EMC Isilon Design Specialist Exam for Technology Architects Sample Questions:

1. -- 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 -
Currently, the workflows are being limited by the network access to the Isilon cluster.
What would result in the fastest possible network throughput?

A) Use LACP to aggregate the network connections.
B) Move analysis infrastructure to dedicated 10G network.
C) Add four A-Series accelerator nodes.
D) Implement jumbo frames.

2. When designing Isilon solutions, which issue should you pay special attention to?

A) Meet customer expectations
B) Conduct stakeholder interviews
C) Create a workflow document
D) Follow all SSD sizing rules

3. Refer to the exhibit.

Which tool was used to create this output and what is the most significant characteristic?

A) nfsstat and read-intensive access
B) nfsstat and write-intensive access
C) iostat and write-intensive access
D) isi_netlogger and moderate metadata read operations

4. A potential customer requires 4 PB of usable capacity to store media files. The workloads are a combination of streaming video delivery and long term archive of video assets.
There is very little space available in the customer's datacenter, so physical density is very important. The customer is concerned about performance impact and potential data loss when using 3 TB or larger drives.
What Isilon capabilities can address the customer's concerns?

A) Isilon does not perform rebuilds - data reprotection is typically 2x-3x faster than traditional RAID
rebuilds.
N+3 and N+4 Protection Levels exceed traditional RAID6 availability.
Data redistribution runs faster with more nodes in the cluster.
B) N+3 and N+4 Protection Levels exceed traditional RAID6 availability.
Proactive hot sparing eliminates most drive rebuilds.
Endurant Cache reduces the overhead for write operations.
C) Isilon nodes have more drives per rack unit so fewer shelves are required.
Proactive hot sparing eliminates most drive rebuilds.
N+3 and N+4 Protection Levels exceed traditional RAID6 availability.
D) Isilon does not perform rebuilds - data reprotection is typically 2x-3x faster than traditional RAID
rebuilds.
Data recovery is consistent, taking the same amount of time regardless of cluster size.
Isilon 'short strokes' 4TB drives to reduce rebuild time.

5. -- Exhibit -
A European Sports TV network is considering Isilon for their Media Edit Storage for their editing workloads. They are also considering Isilon for near-line media archiving.
The network receives XDCAM HD footage which is loaded onto their existing Transcoding Storage platform. New footage that needs to be edited will be transferred from their Transcoding Storage platform to the proposed Media Edit Storage platform at the rate of ten simultaneous XDCAM HD files via FTP. Edited files will be transferred back to the Transcoding Storage platform at the rate of ten simultaneous XDCAM HD files via FTP.
The network currently has 15 Final Cut Pro edit stations, 15 Avid edit stations. Proxy software will be used to allow Isilon to act as the storage for the Final Cut Pro and Avid media. Three of those edit stations will be performing content compositing as needed.
The network expects 70 hours of new content per week, and 50 hours of edited content per week. They intend to keep the new and edited content on the proposed Media Edit Storage as a performance tier for 30 days. They would like to retain all new and edited footage proposed Media Edit Storage as a near-line tier for two years.
In addition to the current workloads, the network expects to implement a new Media Asset Management (MAM) solution and has requested the Isilon cluster be capable of supporting 120 MBps read and 120 MBps write to support the MAM requirements.
-- Exhibit -
Refer to the exhibit.

Based on the number of edit stations, and their intended use, what bandwidth requirements should be considered while sizing?

A) Write Performance: 21 MBps FTP sequential 70 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random Read Performance: 210 MBps FTP sequential 70 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random
B) Write Performance: 550 MBps FTP sequential 275 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random Read Performance: 550 MBps FTP sequential
1.6 GBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random
C) Write Performance: 70 MBps FTP sequential 21 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random Read Performance: 70 MBps FTP sequential 210 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random
D) Write Performance: 70 MBps FTP sequential 210 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random Read Performance: 70 MBps FTP sequential 21 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random

Solutions: