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EMC E20-554 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Isilon Architecture and Concepts | 25% | - Data protection and protection levels - Node types and hardware platforms - Scale-out NAS architecture - OneFS file system fundamentals |
| Topic 2: Solution Design and Sizing | 10% | - Workload analysis and requirements gathering - Scalability and expansion planning - Cluster design best practices |
| Topic 3: Features and Functionality | 20% | - SnapshotIQ, SyncIQ, SmartQuotas - Multi-protocol access and identity management - Security and authentication - Deduplication, compression, and data efficiency |
| Topic 4: Capacity and Performance Design | 25% | - SSD use cases and caching - Performance requirements analysis - Capacity planning and sizing - SmartPools and tiering strategy |
| Topic 5: Network and Connectivity Design | 20% | - Network topology and protocols - Client access protocols (NFS, SMB, HTTP, HDFS) - SmartConnect configuration - Bandwidth and redundancy planning |
EMC Isilon Design Specialist Exam for Technology Architects Sample Questions:
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. 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.
- B. Suggest the customer consider leveraging SSDs in the new nodes they purchase and GNA to boost the performance of each cluster.
- C. Consider migrating data from Isilon to one of their SAN platforms or proposing a new solution to handle the performance requirements of SQL.
- D. 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.
Correct Answer: C 🗳️
Your customer's initial use case was Home Directories. They implemented the cluster with four 1Gbps ports and LACP. They are planning to expand their cluster to support their core file services. They plan to upgrade their network infrastructure to 10 GbE to facilitate this.
What are two design impacts this change will have?
- A. Dual 10GbE ports on each node will enable throughput of 20Gbps. Only connect half of the nodes to the network.
- B. Maximum performance is obtained by only using a single 10GbE interface per node. Isilon can support up to 400MB/s per node
- C. LACP and multiple links may be used to increase redundancy, but will not provide more overall
performance to the system.
FCoE should be considered for the External Network Ports on the nodes. - D. Maximum performance is obtained by only using a single 10GbE interface per node. LACP and multiple links may be used to increase redundancy, but will not provide more overall performance to the system
Correct Answer: D 🗳️
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. Five X400 (120 TB) 96 GB RAM, 2.4 TB SSD, N+2
- B. Ten X400 (60 TB) 48 GB RAM, 2.4 TB SSD, N+2:1
- C. Eight X200 (36 TB) 24 GB RAM, no SSD, N+2:1
- D. Ten X200 (27 TB) 48 GB RAM, 600 GB SSD, N+2:1
Correct Answer: D 🗳️
A company wants to reduce the footprint in their data center. They recently completed a proof of concept with Hadoop using Direct Attached Storage (DAS) for their Big Data initiative. You have determined that incorporating an Isilon cluster into their Hadoop environment would help in reducing this footprint.Which Hadoop components can be consolidated onto the Isilon cluster to reduce the footprint?
- A. DataNode and NameNode
- B. ComputeNode and NameNode
- C. DataNode and ComputeNode
- D. NameNode and TaskTracker
Correct Answer: A 🗳️
A potential customer requires 800 TB of usable capacity to store medical images for their network of health clinics. The IT department has limited staff and currently manages four storage arrays from other vendors. During a meeting with the Director of IT you learn that the company is considering a solution from a competitor of EMC using two of the existing arrays and two new arrays.Which Isilon capabilities would show a better ROI for the customer?
- A. Isilon has 6%-12% less filesystem overhead than traditional clustered filesystem solutions.
With a single filesystem and virtual capacity for drive and node failures, Isilon utilization is typically
80% or higher.
Isilon utilization is typically 80% or higher due to use of a single filesystem and virtual capacity for
drive and node failures. - B. With a single filesystem and virtual capacity for drive and node failures, Isilon utilization is typically
80% or higher.
OneFS compression results in higher effective capacity within the cluster.
Traditional clustered filesystems require 4%-10% internal overhead compared to Isilon virtual
capacity. - C. Forward Error Correction overhead is 7% lower than traditional RAID.
Isilon has 6%-12% less filesystem overhead than traditional clustered filesystem solutions.
According to an IDC study, Isilon improves IT productivity by nearly 50% compared to traditional competitors. - D. Isilon has 15%-20% less overhead than traditional clustered filesystems.
According to an IDC study, Isilon utilization is nearly 50% higher than traditional competitors.
Isilon QOS headroom and multiple node pools ensures consistent performance up to 80%
utilization.
Correct Answer: A 🗳️
