E20-555 Isilon Solutions and Design Specialist Exam for Technology Architects Question and Answers

A customer has a cluster of 16 A200 nodes. Due to recent and forecasted growth, they have decided to

expand the cluster by an additional 24 A200 nodes.

How many neighborhoods will exist on the cluster when all nodes have joined the cluster?

Your customer has an Isilon cluster with five X400 nodes and four 72NL nodes. A SmartPools policy moves data to the NL nodes after 60 days of inactivity. The customer wants to expand the archive tier by at least 150 TB and would like to manage a single archive pool.

Which nodes should be added to the cluster?

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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.

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Currently, the workflows are being limited by the network access to the Isilon cluster.

What would result in the fastest possible network throughput?

If a customer experiences a node failure while at 90% capacity, what is the fastest way of replacing the node in an Isilon cluster?

An Isilon customer implemented a retention period at the directory level. They set individual retention periods on individual files within those directories.

Which retention periods will be enforced?

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?

What determines how a user is directed to the correct secure multi-tenancy access zones?

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 customer is looking for a NAS solution to support their read-intensive application.

This solution must meet the following requirements:

• 1000 users
• Aggregate bandwidth of 5 GB/s
• 500 TB of user data
• Typical latency of 5 ms.

The files are distributed evenly across 10 directories.

Which cluster configuration would best meet these requirements?

A customer has a cluster running with a single access zone and serves multiple internal departments. The

clients access the cluster over both SMB and NFS protocols. A department user has been assigned the task of

auditing SMB activity and enforcing appropriate quotas for certain users.

How should the cluster administrator grant this access?

How does Isilon SnapshotIQ use storage for snapshots?

Which service daemon do FTP and FTPS use to transfer files to and from the cluster?

You have been invited to meet with the Social Media and Marketing Department and gather requirements for a potential File System Project. They primarily use CIFS and are considering deploying a Hadoop cluster to analyze customer demographic data. The Senior Systems Engineer thinks they will need 2PB of usable capacity.

What would you do to gain an understanding of the customer’s environment to qualify and develop the opportunity?

You set up a meeting to gather information on a new project with the IT manager and plan to use a workflow profile assessment (WPA) to document the requirements.

Why is it recommended to talk to as many stakeholders as possible?

In an NFSv3 only environment, what is the recommended limit for active NFSv3 connections, per Isilon node?

A customer requires a backup to tape of their Isilon cluster. They want advice on whether to implement a two-way NDMP solution or a three-way solution. The front-end network must be used to stream data to the backup solution. Which cost-effective solution will meet their needs?

Your customer has an existing Isilon cluster comprised of five NL-Series nodes. They have a new project that will quadruple their current throughput requirements. Upon reviewing reports in InsightIQ, you see that the aggregate external network throughput is peaking at 600MB/s. The customer states that data is only active for the first 7 days, but they keep it indefinitely.

Which recommendation best supports their growth requirements?

Refer to the exhibit.

Which tool was used to create this output and what is the most telling characteristic?

Which tool is used to perform a cluster-wide kernel configuration change on an Isilon Gen 6 cluster?

What is a Shadow Store used for in Isilon OneFS?

What is a benefit of using SSDs for Metadata Read/Write Acceleration?

A customer is planning an Isilon deployment for use with their Hadoop environment. What is one advantage of using Isilon as the HDFS layer?

If a file is 4 KB in size, how much space is consumed for file data when it is written to the Isilon cluster?

You have scheduled a meeting with a prospective customer in the Life Sciences vertical market. Which Isilon features should be presented to them?

Refer to the Exhibit.

What is represented by the information shown?

A customer is considering moving their NAS data over to Isilon systems. They want to know if the Isilon systems have any limitations regarding snapshots.

What explanation can be provided?

A customer has installed an Isilon Gen 6 cluster as a Proof of Concept. Before making a purchase decision,

they would like to compare the performance of the Isilon to competitive offerings.

Which tool can be used to provide data analysis and benchmarking through existing workflows?

A customer plans to deploy N+2:1 protection on a 5-node Isilon cluster. How much capacity will be used to store a 320 KiB file?

What is the minimum size and the maximum size, respectively, of a single pre-Gen 6 node pool?

A telecommunications company has a substantial amount of data. This data is being created by network elements within their environment.

The company wants to change the way the network elements Call Detail Records (CDR) are stored and analyzed. The existing infrastructure consolidates all of the CDRs into a table structure, and then ingests them into a large database. Once ingested, a query engine accesses the database and performs analysis on these files. The system is functional; however, since the amount of CDRs generated will increase exponentially over the next year, the company is open to alternatives for storing and analyzing these records.

In evaluating alternatives, the key requirements are to reduce cost, the amount of storage, and the amount of time to analyze the data. The customer would like to use Hadoop to analyze the CDRs.

After you have conducted an assessment of the workflow, you have recommended an Isilon Cluster to work within the Hadoop environment.

Considering the customer's requirements, which is the best node type for the Isilon cluster?

Which impact policies are available on an Isilon cluster?

The data access pattern on a Gen 6 Isilon cluster in Concurrency. What describes this workload?

-- 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 --

The customer will add two more Illumina Hi-Seq Sequencers in the next 6 months.

Once these are added, what is the total amount of data from all the sequencers they can expect to add per month?

A telecommunications company has a substantial amount of data. This data is being created by network elements within their environment.

The company wants to change the way the network elements Call Detail Records (CDR) are stored and analyzed. The existing infrastructure consolidates all of the CDRs into a table structure, and then ingests them into a large database. Once ingested, a query engine accesses the database and performs analysis on these files. The system is functional; however, since the amount of CDRs generated will increase exponentially over the next year, the company is open to alternatives for storing and analyzing these records.

In evaluating alternatives, the key requirements are to reduce cost, the amount of storage, and the amount of time to analyze the data. The customer would like to use Hadoop to analyze the CDRs.

After you have conducted an assessment of the workflow, you have recommended an Isilon Cluster to work within the Hadoop environment.

What would be the best recommendation to the customer for the workflow of Hadoop with Isilon?

A customer plans to consolidate 200 TB of digital images and video content. Performance is important for recently created files. However, the customer wants any content that has not been accessed within 30 days to be stored in the cluster at a much lower cost because performance is no longer critical.Which Isilon configuration should be recommended?

Which block size is used by Isilon SyncIQ to transfer data?

An Isilon customer wants a job to periodically check disk sectors to ensure they can be read. What should be recommended to the customer?

What is the correct sequence of events in a SyncIQ failover procedure after a failure occurs in the source Isilon cluster?

Which Isilon OneFS protection level allows you to withstand two drive failures but no more than one complete node failure?

An Isilon storage administrator is concerned about capacity after ingesting 200 TB of file data. They recently added more nodes to the cluster and now want to auto-balance it as soon as possible.

The cluster utilization percentages for an average 24-hour period are:

• 45% during 00:00 - 08:59
• 60% during 09:00 - 17:00
• 85% during 17:01 - 23:59

The administrator wants to keep cluster utilization at a minimum. Which Impact Policy settings should be used to quickly complete the job without impacting the production workload?

A customer is running OneFS 8.0 on an Isilon cluster consisting exclusively of NL400 nodes. The storage administrator recently heard that OneFS 8.1 provides journal vaulting. What should you advise the storage administrator?

A potential customer uses a solution from an EMC competitor for NFS storage in their main data center. The existing arrays are five years old, and the customer would like to consolidate them into a single new system. The entire workload is generated by eight Linux hosts connected to the arrays that process video files. The customer informs you they are not able to collect performance information from the existing arrays.

Which tools can capture the workload requirements?

A customer has a 5 node Isilon cluster. The raw capacity of the cluster is 85% used. On average, the cluster has 4,000 users connected during office hours. The average CPU usage is 65%. The customer needs to delete some data to free up capacity. What should the customer do to minimize the effect of the deletion job?

What is the smallest unit of data that Isilon OneFS will write to disk?

Traditional NAS storage architecture deploys simple two-way failover between two controllers in their storage systems, such as highly-available configurations. How is the Isilon architecture different in terms of system resiliency and availability?

You are sizing an Isilon Cluster for a new customer. Analyzing their workflow, you determine that they have a small block random read workload.

What is the most important factor to consider when sizing this solution?

While configuring Isilon SmartConnect, a customer determined that their workload primarily consists of long-lived NFS and SMB connections. Which load-balancing policy will provide the most efficient client distribution?

During a write process in OneFS 8.0, from which cache are blocks copied to disk?