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EMC E20-554 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Implementation and Troubleshooting | - Common issues and troubleshooting methods - Deployment planning and best practices |
| Data Protection and Availability | - Erasure coding and data protection schemes - Snapshots, replication, and backup integration |
| Networking and Protocols | - Network architecture for Isilon clusters - NFS, SMB, and HDFS protocol support |
| Solution Design Considerations | - Cluster design and scalability planning - Customer requirements analysis and sizing |
| Performance and Scalability | - Cluster scaling and workload distribution - Performance optimization techniques |
| Isilon / OneFS Architecture Fundamentals | - OneFS operating system fundamentals - Scale-out NAS architecture concepts |
EMC Isilon Design Specialist Exam for Technology Architects Sample Questions:
1. You meet a customer for the first time. They explain that their current environment for NAS does not meet their needs. You want to make sure that Isilon is a good fit for their needs.
What would be a good prequalifying question to ask?
A) What protocols are accessing your NAS?
B) How many users are in your Directory Services?
C) What application are you using to create directories?
D) Is your datacenter ISO9001 compliant?
2. A customer is inquiring about expanding their primary cluster consisting of six S-Series nodes in order to improve performance. They have a second cluster with 11 X-Series nodes. Both clusters leverage 1GbE, but the customer recently installed a 10GbE network that can be utilized. They also have multiple Fibre Channel SAN arrays in their environment.
They have a variety of workloads on each cluster and are in the process of determining which workloads belong on which cluster. They have discovered that one of the workloads- a SQL database that resides on the X-Series node cluster - is experiencing timeouts due to latency. The database vendor has suggested limiting latency to 5ms or less to eliminate these timeouts.
How do you advise the customer?
A) Merge the S-Series nodes and X-Series nodes into one cluster, upgrade the 1GbE to 10GbE, and leverage SmartPools to allow for the cluster to determine where data should reside.
B) Consider migrating data from Isilon to one of their SAN platforms or proposing a new solution to handle the performance requirements of SQL.
C) Recommend they increase the amount of DRAM in the cluster or consider an Accelerator node in order to increase the amount of cache in their cluster.
D) Suggest the customer consider leveraging SSDs in the new nodes they purchase and GNA to boost the performance of each cluster.
3. A potential customer has about 540TB of NetApp running in ONTAP 7-Mode. They are willing to let you gather some workload data. They have LDAP and Active Directory authentication and primarily Windows Clients. They are very interested in Automated Tiering and Large Scale Archives. They are not certain about the workflows from the Marketing Department. The Content Team will only say they need to acquire 300 TB within 90 days. They do not know the average file size or the number of aggregates they are managing.
Which tools would you use to gather information to do your Isilon sizing?
A) Wireshark, isi statistics, and iostat
B) Isilon Insight IQ, OnCommand Insight, and nfsstat
C) MiTrendWPA ,Autosupport, and PerfCollect
D) isi status, isi_netlogger, and PerfMon
4. -- 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) 6 x X400 nodes with 36 x 4TB drives 1 x Backup Accelerator
B) 9 x S200 nodes with 2 x SSD and 22 x 900GB SAS
C) 4 x NL400 nodes with 36 x 4TB drives
D) 4 x X400 nodes with 2 x SSD and 34 x 4TB drives 1 x Additional NL400
5. You have 1000 users for an application that reads and writes files averaging between one and four MB in size. Each user requires 24 MB of RAM. You want to add another 1000 users for this application, and in preparation for them, you run the isi statistics command. You discover that the average CPU utilization is 20%; aggregate throughput averages 700 MB/s and the disk QueueD average is 1.5. Your cluster currently has five X200 (12 GB RAM, 1 TB drive) nodes, uses N+2:1 protection and 1 GigE networking.
What should you do to accommodate the next 1000 users?
A) Upgrade each X200 node to a total of 24 GB of RAM.
B) Add five additional X200 (12 GB, 1 TB drive) nodes
C) Add five A100 (24 GB RAM) accelerator nodes.
D) Upgrade two of the 1 GigE NICs to 10 GigE on each node.
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: B | Question # 3 Answer: C | Question # 4 Answer: D | Question # 5 Answer: B |







