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EMC Isilon Design Specialist Exam for Technology Architects Sample Questions:

1. Your customer is looking for a storage solution that will be able to store seven million 3 MB files which are written and seldom accessed. Read and write operations are both completed by a web-based application, which requires 1.3 Gbps throughput. The customer's network has not been upgraded in many years, so the network interfaces are 1 Gbps.
What would be the best solution for this network configuration?

A) Aggregate Infiniband (IB) ports across all nodes.
B) Use LACP to aggregate the network ports on each node.
C) Bond EXT-0 across all nodes.
D) Use jumbo frames to compensate for the 1GB Core network.

2. 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

3. 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) 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
D) 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.

4. -- Exhibit -
We have been engaged by a research hospital to help upgrade their Isilon installation. They currently have 12 previous generation Isilon nodes with 200TB of capacity and run on a 1Gbps network. They currently have 6 Illumina Hi-Seq Sequencers and an HPC cluster to process data. They would like to expand Isilon to 2PB of active data and 1PB of archive data. They use a third party data and metadata management service (IRODs) to stage data for analysis. The Isilon cluster is mainly used for analysis work with the HPC cluster.
-- Exhibit -
Before making any changes, the customer would like a graphical presentation of their existing array performance to present to management.What is the best tool to gather this information?

A) tcpdump
B) isi_netlogger
C) InsightIQ
D) netstat

5. You will be meeting with the Corporate Security Team as part of the implementation planning for a new Isilon cluster deployment. The Lead Security Analyst has asked you to discuss the Authentication Sources on your Isilon Cluster.
What customer questions regarding Isilon-supported Authentication Sources do you need to be prepared to answer?

A) Is the cluster X.400 compliant?
What firewall rules are in place to prevent data leakage?
Is there a audit trail for access zone configuration changes?
B) Are you using File Services for UNIX in your AD environment?
Do you support NIS+ for NFS authentication?
Do you support multiple Access Zones connecting to the AD Domain?
C) What mechanism are you using for NFS authentication?
Do you support Novell Directory Services?
What implementations of LDAP are supported?
D) What mechanism are you using for NFS authentication?
Do you have multiple AD domain support?
What versions of LDAP are supported?

Solutions: