EMC Isilon Design Specialist Exam for Technology Architects : E20-554

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EMC Isilon Design Specialist Exam for Technology Architects Sample Questions:

1. 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.

2. Your customer has a new business unit. They are gathering web log files to be analyzed. They are using Hadoop to do the analysis of the logs. The IT department is centrally storing the log files on a 5-node Isilon cluster. They have enabled the Hadoop cluster to access the files directly on the Isilon storage. The nodes are X400's with two SSD drives in each node and 96GB of RAM.How many DataNodes does the Isilon cluster have?

A) Three
B) Five
C) Two
D) One

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

4. 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 type of racks are in your datacenter?
B) Are you using a KVM to access your storage?
C) How many NICs do your clients have?
D) What applications access this storage?

5. Refer to the exhibit.

You want to add redundancy to your network configuration, rather than performance. You have configured all interfaces into the default SmartConnect zone.
How should you configure the switches and Isilon networking to provide your desired network redundancy?

A) Configure the switch ports as access points and use LACP aggregation for subnet0:pool0.
B) Configure the switch ports as access points, bond ext-0 and ext-1 on all nodes and use Active/Passive aggregation for subnet0:pool0.
C) Configure the switch ports for LACP and use FEC aggregation for subnet0:pool0.
D) Configure the switch ports for LACP and use LACP aggregation for subnet0:pool0.

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