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Category: E20-555 (v.1)

Exam E20-555: Isilon Solutions and Design Specialist Exam for Technology Architects (update January 28th, 2014)

What would be the best solution for this network configuration?

Your customer is looking for a storage solution that will be able to store seven million 3 MB files
which are written and seldom accessed. Read and write operations are both completed by a webbased application, which requires 1.3 Gbps throughput. The customer’s network has not been
upgraded in many years, so the network interfaces are 1 Gbps.
What would be the best solution for this network configuration?

what is the comparable feature in Isilon OneFS?

In your second meeting with the customer you ask the following questions about their current
unified SAN and NAS platform.
“Are you using an application to map users from NFS Exports to SMB shares? Is each site a
separate LDAP or AD Domain?”
What functionality are your trying to understand in their environment and what is the comparable
feature in Isilon OneFS?

What is the recommended solution that will meet this company’s requirements?

A company currently has multiple fileservers to provide home directories for its employees. Each
department has a separate fileserver. Most corporate users are on Windows clients and utilize
Active Directory, except for the Engineering department, which uses Linux and NIS for
authentication. The company is looking for a solution with minimal administrative overhead and a
single namespace for the home directories.
What is the recommended solution that will meet this company’s requirements?

What is the recommended solution that will meet this company’s requirements?

A company currently has numerous file servers providing home directories for its employees.
Some departments have their own file servers. All corporate users authenticate using Active
Directory. The engineering department has their own untrusted AD domain for their file servers.
The company is looking for a consolidated solution that requires minimal changes to the
environment, and that creates a single namespace for the home directories.
What is the recommended solution that will meet this company’s requirements?

What should be done to increase write performance of the cluster?

An Isilon customer is reporting less than expected performance from the cluster and poor space
utilization. The customer is using three X400 nodes with N+2:1 protection policy to host webserver
log data. Upon further analysis, it is discovered that the webservers write log files 64 KiB in size.
The log files are then accessed by an analytics application for reporting.
What should be done to increase write performance of the cluster?

What is the minimum initial configuration you would recommend?

A healthcare services provider is implementing an X-Series cluster. Currently they have
approximately 200 customers and they are growing at 30% per year. They have 200 TB of storage

utilized. Health Insurance Portability and Accountability Act (HIPAA) regulations require they keep
all patient data for seven (7) years. They would like to keep all genomic sequencing data stored
with N+3 protection, not to exceed 75% utilization.
What is the minimum initial configuration you would recommend?

which Isilon cluster configuration would you recommend?

— Exhibit —
A large manufacturing company is an existing Isilon customer with a cluster consisting of four
NL400 nodes with 4TB drives. The cluster is using N+2:1 protection level and the file system
shows that it is 60% utilized. Home directories and file shares comprise 75% of the existing
content and the remainder is inactive deep archive. The company has 1,000 employees using
Windows and Mac clients participating in a single Active Directory (AD) forest.
During a meeting with the CIO and Director of IT you discuss the company’s recent acquisition –
an engineering firm that specializes in Computer Aided Design (CAD). The engineering firm has
400 UNIX workstations that produce technical drawings which are currently stored on another
vendor’s SAN solution. The all UNIX environment uses NIS for authentication and name
resolution. They do not currently use DNS or LDAP. The engineering company has an old storage
system that has been experiencing problems and the CIO would like you to migrate the data onto
the Isilon cluster. The CIO would like to eliminate all tape and recover the data onto disk.
The CIO is concerned about security of the company’s intellectual property, especially with the
rapid adoption of mobile devices and external cloud content sharing services such as DropBox,
Egnyte, and SugarSync. They would like to implement an alternative that provides external file
sharing and mobile device synchronization while maintaining security control over the company’s
data.
The Director of IT reports that users are storing non-work related content on the Isilon cluster.
They would like to limit the amount of capacity that each user can consume in their home directory
and want to ensure you provide the capability to easily visualize which users are over their
allotment.The company’s Windows users currently leverage Windows Shadow Copy to recover

files that have been accidentally deleted. The IT department wants to ensure that Mac and
incoming UNIX clients have the same functionality.
The Director of IT also mentions that users are reporting slow response times when browsing their
home directories and shared folders. They are concerned that Isilon cannot scale to support their
combined requirements.

— Exhibit —
Based on the meeting with the customer, which Isilon cluster configuration would you
recommend?


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