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EMC E20-554 Exam Syllabus Topics:

EMC Isilon Design Specialist Exam for Technology Architects Sample Questions:

1. You are asked to size a cluster for a file sharing environment. nfsstat indicates that no more than 10% of the requests are namespace operations (e.g. GETADDR, SETADDR). There will be 10,000 active Linux users, connecting over NFS.
Which cluster configuration would you recommend?

A) Ten X200 (27 TB) 48 GB RAM, 600 GB SSD, N+2:1
B) Eight X200 (36 TB) 24 GB RAM, no SSD, N+2:1
C) Five X400 (120 TB) 96 GB RAM, 2.4 TB SSD, N+2
D) Ten X400 (60 TB) 48 GB RAM, 2.4 TB SSD, N+2:1

2. Refer to the exhibit.

Which tool was used to create this output and which line item counts the metadata read operations occurring in the file service?

A) tcpdump and nfsstat
B) isi_netlogger and commit
C) nfsstat and getattr
D) iostat and fsstat

3. Refer to the exhibit.

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

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

4. Refer to the exhibit.

A large hospital chain has approached you to redesign their storage infrastructure. The head of IT believes their requirement is for 100 TB of RAW capacity. They want to consolidate their PACS, file shares and home directories onto one cluster and require very fast enumeration of the directories. The following are the notes from meetings with the department heads.Which is the best cluster configuration that meets the customer's requirements?

A) 5 x S-Series nodes
B) 3 x NL-Series nodes using SynqIQ to 3 x NL-Series nodes
C) 4 x X-Series nodes using SynqIQ to 4 x NL-Series nodes
D) 3 x S-Series nodes using SmartPools and 3 x NL-Series nodes for Archive

5. -- 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.
The customer provides the following environment summary from the engineering firm's recently departed IT staff:
20 TB of Home Directory data
100 TB of active CAD projects
400 TB of archived data stored on tape at an offsite warehouse -- Exhibit -
Based on the meeting with the customer, which Isilon cluster configuration would you recommend?

A) 4 x NL400 nodes with 36 x 4TB drives
B) 9 x S200 nodes with 2 x SSD and 22 x 900GB SAS
C) 6 x X400 nodes with 36 x 4TB drives 1 x Backup Accelerator
D) 4 x X400 nodes with 2 x SSD and 34 x 4TB drives 1 x Additional NL400

Solutions: