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Exam Code: E20-554
Exam Name: EMC (Isilon Design Specialist Exam for Technology Architects)
One year free update, No help, Full refund!
Total Q&A: 30 Questions and Answers
Last Update: 2013-10-13

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NO.1 A customer's cluster contains three X200 (24 GB RAM, 3 TB drives) nodes, and three X400 (48
GB RAM, 1 TB drives) nodes.
All nodes are configured in a single pool.
All data is protected at N+2. After upgrading OneFS to 7.0, the Isilon Web interface indicates that
files are not fully protected. RA
A. Add 24 GB RAM to each of the X200 nodes
B. Recreate the original pool using the Isilon Web interface
C. Add two X200 nodes and two X400 nodes
D. Recreate the original pool using the command line interface
Answer: C

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NO.2 Your customer is looking for a storage solution that will be able to store seven million three
MB files which are written and seldom accessed.
Read and write operations are both completed by a web based application, which requires 1.3 Gbps
throughput.
The customer's network has not been upgraded in many years, so the network interfaces are 1Gbps.
Which cluster configuration would best meet the customer's requirements? RA
A. 3 NL400 nodes
B. 3 X400 nodes
C. 4 X200 nodes
D. 5 S200 nodes
Answer: C

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NO.3 Your customer has a new business unit. They are gathering web log files to be analyzed.
They are using Hadoop to do the analysis of the logs.
The IT department is centrally storing the log files on a five node Isilon cluster.
They have enabled the Hadoop cluster to access the files directly.
The nodes are X400's with two SSD drives in each node and 96GB of RAM.
How many DataNodes does the Isilon Cluster have? RA
A. 1
B. 5
C. 10
D. 15
Answer: B

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NO.4 You have scheduled a meeting with a prospective customer in the Life Sciences vertical
market.
Which Isilon features should be presented to them? RA
A. SyncIQ, Antivirus, 10 GigE support and HDFS
B. SmartPools, HDFS, 10 GigE support and SmartQuotas
C. SmartLock, HDFS, SmartPools and SmartQuotas
D. SyncIQ, SmartLock, HDFS and SmartConnect
Answer: B

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NO.5 You are asked to size a cluster for a file sharing environment. nfsstat indicates that 75% of the
requests are namespace operations (e.g., GETADDR, SETADDR). There will be 8,000 active Linux
users, connecting over NFS? RA
A. Five X400 (66 TB) 48 GB RAM, 1.2 TB SSD, N+2:1
B. Eight X200 (27 TB) 12 GB RAM, 600 GB SSD, N+2
C. Eight X200 (27 TB) 48 GB RAM, 600 GB SSD, N+2:1
D. Eight X200 (36 TB) 48 GB RAM, no SSD, N+2:1
Answer: C

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NO.6 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?
RA Exhibit:
A. It is mostly sequential reads
B. It is meta data intensive
C. It uses large read requests
D. It contains mostly random writes
Answer: B

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NO.7 Click on the calculator icon. 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? RA
A. 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
B. Create a cluster configuration specifying HDFS, NFS, and CIFS protocols; select 19 x X400 nodes
with 144TB per node, and Enhanced Support
C. 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
D. Ask them to identify how the current data is accessed, where the data is accessed from, and who
is accessing the data
Answer: D

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NO.8 A potential customer is considering replacing a four year old, Linux-based NFS server with
40TB of usable capacity.
The existing system supports home directories, an internal website, and a content repository for the
customer's content management system.
The customer is concerned about performance of any new solution because they expect to double
workload in the content management system. RA
A. syslog and vmstat
B. Perfmon and sysstat
C. isi statistics and Wireshark
D. iostat and nfsstat
Answer: D

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NO.9 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? RA
A. IOPS
B. Bandwidth
C. Latency
D. Headroom
Answer: A

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NO.10 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 65%
utilized for their video surveillance operations.
They wish to achieve the following: --Upgrade from 1280 x 720 resolution, with a 15 days retention
policy, to 2048 x 1536 resolution with a 30 days retention policy.
What is the minimum number of nodes of the same type will you need to add in order to meet the
required changes and not exceed 70% raw capacity? RA
A. 6 nodes
B. 10 nodes
C. 14 nodes
D. 18 nodes
Answer: B

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