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EMC Isilon Design Specialist Exam for Technology Architects Sample Questions:

1. A cost-conscious customer is exploring Isilon for their PACS archive. The workflow consists of one hundred cases a day, each including fifty 60MB image files. However, each image will have five-hundred 64kB metadata files associated with it. They currently have six years worth of archived data. They will need to migrate to the new solution and they need to plan for an additional three years of archive capacity.
Which solution would you recommend to fit their capacity needs?

A) 24 X-Series nodes with N+3 protection policy providing 2597 TiB of useable capacity
B) 18 NL-Series nodes with N+2:1 protection policy providing 2078 TiB of useable capacity
C) 24 NL-Series nodes with N+3 protection policy providing 2597 TiB of useable capacity
D) 12 NL-Series nodes with N+2 protection policy providing 1300 TiB of useable capacity

2. 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 you trying to understand in their environment and what is the comparable feature in IsilonOneFS?

A) NFS Export Management and OneFS Cluster Management
B) User Management and AD Authentication
C) Identity Mapping and Authentication Sources
D) Kerberos Infrastructure and Identity Management

3. You are sizing an Isilon cluster for a new customer. Analyzing their workflow you determine that they have a large block random read workload.What is the most important factor to consider when sizing this solution?

A) Latency
B) Bandwidth
C) Headroom
D) IOPS

4. 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 A100 (24 GB RAM) accelerator nodes.
C) Upgrade two of the 1 GigE NICs to 10 GigE on each node.
D) Add five additional X200 (12 GB, 1 TB drive) nodes

5. A customer has grown 2 PB in the last year. The cluster performs well most times of the day, but occasionally during the day, the customer notices a decrease in performance. You have been told that 'tree-deletes' are taking too long and can only be run on weekends.
What would you recommend to speed up the 'tree-deletes'?

A) Use an A100 node for added CPU performance to help with 'tree-deletes.'
B) Add an SSD node tier for metadata to account for at least 2% of RAW capacity
C) Add an SSD tier for metadata, ensuring all nodes have SSDs.
D) Add 20% more nodes to the cluster to help with degraded performance.

Solutions: