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

Questions 4

In what order does an Isilon Gen 6 cluster respond to a client file read request?

Options:

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Questions 5

You are designing an Isilon 5-node cluster configuration for a customer who wants to store user home directories on the new cluster. Each user has 100 small files of 4KB each, 100 medium sized files of 80KB each, and 100 larger files of 512KB each. How much space is occupied by the medium sized files data blocks on an N+1n cluster?

Options:

A.

9,600KB

B.

15,360KB

C.

16,000KB

D.

25,600KB

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Questions 6

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?

Options:

A.

1

B.

2

C.

4

D.

6

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Questions 7

What is the maximum volume or aggregate size that can be created with an Isilon Scale-Out NAS system?

Options:

A.

16 TB

B.

100 TB

C.

2.3 PB

D.

20 PB

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Questions 8

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

Options:

A.

Can be mixed with L3 cache on same node pool

B.

Improved create, write, and delete performance

C.

Guarantees data can be pinned to SSD

D.

Does not need numerous SSDs to be effective

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Questions 9

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?

Options:

A.

There is no hard limit on snapshots.

B.

There is a limit of 1024 snapshots per cluster.

C.

There is a limit of 2048 snapshots per cluster.

D.

There is a limit of 2048 snapshots per directory.

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Questions 10

A hospital is considering using Isilon to store their long-term archive data for their GE PACS application. They currently have two million 17 MB studies. They expect capacity requirements to be 50% compounded growth per year. They plan to use N+2:1 protection, and would like this sized for three years of growth.

Which minimum cluster configuration would meet this customer's environment?

Options:

A.

Five NL400 (1 TB drive) nodes

B.

Four NL400 (2 TB drive) nodes

C.

Five X200 (3 TB drive) nodes

D.

Three X400 (3 TB drive) nodes

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Questions 11

An Isilon customer created a scheduled SyncIQ policy to replicate data from an Enterprise-mode SmartLock directory. The source cluster is now unusable and the target cluster does not automatically allow writes to the data in the replicated SmartLock directory.

What is the reason why the target cluster did not automatically allow writes of the data?

Options:

A.

SyncIQ Automated failover is not supported for SmartLock directories; however, manual failover is allowed.

B.

Automated failover and manual failover are not allowed on SmartLock directories on the target cluster.

C.

A SyncIQ job was running while the source cluster became unusable, thereby removing all data on the target directory.

D.

SnapshotIQ was not licensed on the target cluster; the snapshot of the directory is not available for use by SyncIQ.

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Questions 12

When using an N+2:1 protection policy on a 7-node Isilon cluster, how much capacity will be used to store a 510 KiB file?

Options:

A.

638 KiB

B.

640 KiB

C.

766 KiB

D.

768 KiB

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Questions 13

A company needs the ability to separate administrative rights from data access rights. Which Isilon feature enables this functionality?

Options:

A.

RBAC

B.

SmartConnect

C.

SmartLock

D.

SmartQuota

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Questions 14

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?

Options:

A.

Three NL400 nodes with 2TB drives

B.

Three X400 nodes with 1TB drives

C.

Two NL400 nodes with 4TB drives

D.

Two X400 nodes with 3TB drives

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Questions 15

Which provider supports authentication and lookup facilities for local users and groups that have been defined and are maintained on the cluster?

Options:

A.

AD

B.

File

C.

NIS

D.

Local

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Questions 16

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?

Options:

A.

Medium, Low, Low

B.

Medium, Medium, Low

C.

High, Medium, Paused

D.

High, High, Low

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Questions 17

Which type of deduplication is used to maximize the storage efficiently on an Isilon cluster?

Options:

A.

Fixed-segment

B.

Post-process

C.

Target-based

D.

Inline

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Questions 18

An Isilon customer is reporting less than expected performance from the cluster and poor space utilization. The customer is using three X400 nodes with N+2:1 protection policy to host webserver log data. Upon further analysis, it is discovered that the webservers write log files 64 KiB in size. The log files are then accessed by an analytics application for reporting.

What should be done to increase write performance of the cluster?

Options:

A.

Change the protection scheme to a mirroring policy.

B.

Add A-Series performance accelerator nodes to the cluster.

C.

Add S-Series storage nodes to the cluster.

D.

Add SSDs to the X-Series nodes in the cluster.

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Questions 19

What determines the number of job engine workers assigned to a task?

Options:

A.

Job task

B.

Job priority

C.

Job impact policy

D.

Job phase

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Questions 20

By default, which method is used by Isilon OneFS for SSDs?

Options:

A.

Metadata read acceleration

B.

Metadata read/write acceleration

C.

Data on SSDs

D.

Avoid SSDs

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Questions 21

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?

Options:

A.

Seven X400 (108 TB) nodes with no SSD

B.

Eight NL400 (96 TB) nodes with 1.6 TB SSD

C.

Eight X400 (96 TB) nodes with 1.6 TB SSD

D.

Twenty-five X200 (30 TB) nodes with 800 GB SSD

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Questions 22

On an Isilon cluster, how much space should be reserved for snapshots by default?

Options:

A.

0%

B.

5%

C.

10%

D.

20%

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Questions 23

Refer to the exhibit.

During a requirements gathering meeting, the customer identified a desire to use a codec for editing content that will take up the least amount of space on their Isilon cluster. The content is 1920x1080 HD.

Based on the provided list of codecs, which codec would minimize the storage requirement?

Options:

A.

DNxHD 145 8 Bit

B.

DPX 8 Bit

C.

ProRes 444 12 Bit

D.

DNxHD 220 10 Bit

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Questions 24

An Isilon customer needs to grant a specific administrator on RBAC privilege. What does the customer need to do?

Options:

A.

Add the selected user account to the appropriate RBAC role and facilitate user access to the System access zone.

B.

Add the selected user account to the local provider, grant the appropriate RBAC role, and facilitate access to the production access zone only.

C.

Add the selected user account to the remote provider, grant the appropriate RBAC role, and facilitate access to the production access zone only.

D.

Add the selected user account to the local provider, grant the appropriate RBAC role, and facilitate access to both the production access zone and System access zone.

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Questions 25

An Isilon has 3 NL410 nodes with 36 2 TB HDDs each. VHS is specified as 3 virtual drives or 15 percent of the node pool. Which configuration would be used as reserved space for VHS?

Options:

A.

15% of the total space in the node pool

B.

3 virtual drives for each node in the cluster

C.

15% in the node pool plus 3 virtual drives

D.

3 virtual drives in the cluster

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Questions 26

A company has purchased an Isilon cluster. The storage administrator knows they will have a large number of clients with similar workloads connecting to the cluster through NFS, and connections will be maintained for a long time. Which two connection balancing policies should be recommended for initial use? (Choose two.)

Options:

A.

Round Robin and Connection Count

B.

CPU Utilization and Network Throughput

C.

Round Robin and CPU Utilization

D.

Connection Count and Network Throughput

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Questions 27

An architect is designing a solution for a new customer. The customer is going to use the cluster to store a

large number of files that will be accessed by many users.

What IO optimization should be used and what kind of prefetching will take place?

Options:

A.

Concurrency, aggressive prefetching

B.

Random, aggressive prefetching

C.

Concurrency, moderate prefetching

D.

Concurrency, no prefetching

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Questions 28

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?

Options:

A.

Helps downstream personnel, such as implementation and delivery, to have a clearer understanding of the requirements.

B.

Completing this document gives sales a list of who the stakeholders are at customer site.

C.

Using workflow profile enables sales to take this information to EMC consulting for review to validate the configuration.

D.

Using the WPA tool will give you the best "big picture" to see things such as block size, de-dupe, file size and volumes.

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Questions 29

A media and entertainment company has asked for help in creating a new Video On Demand (VOD) storage system. The storage would be delivered to 5000 subscribers simultaneously. They would like to store 5000 hours of full length, High Definition (HD) movies.

What would be the best price-to-performance nodes for this solution?

Options:

A.

X400 with no SSD and 96GB RAM

B.

X200 with no SSD and 48GB RAM

C.

Mixed X400 48GB RAM and NL400 24GB

D.

X400 with 1.6TB SSD and 24GB RAM

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Questions 30

An administrator recently installed InsightIQ to gather cluster statistics, and wants to look at file system usage (such as the number of files in a directory). However, currently no file system statistics are displayed in InsightIQ after 24 hours. Use of the cluster is moderate, and occurs 24 hours per day.

What job for InsightIQ should the administrator modify to successfully report these statistics?

Options:

A.

Change priority to 1 and job impact to High for Collect

B.

Change priority to 4 and job impact to Medium for FSAnalyze

C.

Change priority to 7 and job impact to Medium for SmartPools

D.

Change priority to 3 and job impact to Low for MultiScan

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Questions 31

A company needs to have their data asynchronously replicated. They also need to maintain a daily copy of the data for a week at the target side to enable fast recovery of files. They decide to purchase two Isilon clusters. They do not want to spend money unnecessarily. Which licenses must they acquire?

Options:

A.

SyncIQ license at source and target clusters. SnapshotIQ license at source and target clusters.

B.

SyncIQ license at source cluster only. SnapshotIQ license at source cluster only.

C.

SyncIQ license at target cluster only. SnapshotIQ license at target cluster only.

D.

SyncIQ license at source and target clusters. SnapshotIQ license at target cluster only.

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Questions 32

What is appropriate for capturing packets for later analysis of I/O request sizes and randomness on Isilon clusters?

Options:

A.

Wireshark

B.

tcpdump

C.

iostat

D.

Mitrend

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Questions 33

When planning a new cluster using backend leaf-spine topology, what is the maximum number of nodes

supported when using two leaf switches and one spine switch?

Options:

A.

32

B.

44

C.

66

D.

144

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Questions 34

A customer has a cluster consisting of six H500 nodes (in one full chassis and one half populated chassis) and

four A200 nodes (in one full chassis). The customer wants to expand their A200 nodes.

What is the minimum number of A200 nodes and chassis the customer can add to the cluster?

Options:

A.

2 nodes; 0 chassis

B.

2 nodes; 1 chassis

C.

4 nodes; 1 chassis

D.

4 nodes; 2 chassis

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Questions 35

An Isilon customer created a SyncIQ policy to replicate data from a primary cluster to an offsite secondary cluster. The primary cluster becomes unavailable, and the customer has completed a failover onto the secondary cluster.

The primary cluster becomes available again, so the customer would like to fail back data to the primary cluster. The failback process does not replicate data.

What is the most likely reason the failback policy does not replicate data to the primary cluster?

Options:

A.

Clusters are not sharing an Infiniband switch

B.

Secondary cluster has modified files on it

C.

Original policy was for synchronization

D.

Policy contains a SmartLock directory

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Questions 36

A customer configures a file pool policy to write data to tier 2 on the Isilon cluster. This is in addition to the 30 policies already created. Later in the week they check the file placement and see that it has not been written to the correct tire. What could be the problem?

Options:

A.

Number of allowable policies has been exceeded so the new policy will not run.

B.

File matches a policy for a different tier that is listed higher in the file pool policy list.

C.

SmartPools policy job has not yet run so the file was written using the default policy.

D.

File matches a policy for a different tier that is listed lower in the file pool policy list

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Questions 37

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?

Options:

A.

Random Selection

B.

CPU Utilization

C.

Network Throughput

D.

Connection Count

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Questions 38

A customer is using file pool policies to archive infrequently accessed files to Amazon S3 via CloudPools. How

could the customer easily find out how many stub files are stored on the cluster?

Options:

A.

OneFS WebUI can be used to show how many stubs are stored in each node pool

B.

InsightIQ can report the number of stub files stored on the cluster

C.

The isi statistics CLI command can be used to show how many stubs are stored in each node pool

D.

The number of stub files stored on a cluster is not easily available

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Questions 39

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?

Options:

A.

Isilon OneFS enables each node to have a designated partner node for simple failover between the pair.

B.

Isilon solutions can enable failover to other nodes with the use of client-side drivers.

C.

Isilon clustered architecture deploys standby failover nodes to ensure the highest available solution.

D.

Isilon OneFS enables each node to be a peer to any other node in an Isilon cluster.

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Questions 40

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?

Options:

A.

What protocols are accessing your NAS?

B.

What application are you using to create directories?

C.

Is your datacenter ISO9001 compliant?

D.

How many users are in your Directory Services?

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Questions 41

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?

Options:

A.

Replace the batteries of the battery backed volatile storage with NiMH batteries.

B.

Add SSDs to all nodes of the existing cluster and upgrade to OneFS 8.1.

C.

Migrate all data from the current Isilon cluster to a Gen 6 cluster.

D.

Add a Gen 6 node to the existing Isilon cluster and upgrade to OneFS 8.1.

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Questions 42

Which node type provides CPU, memory, and Fibre Channel connectivity?

Options:

A.

Backup Accelerator

B.

Performance Accelerator

C.

X-Series

D.

NL-Series

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Questions 43

You are setting up SmartPools on the cluster. Which Microsoft Windows system tool will illustrate the difference in performance experienced by clients connecting to different tiers of storage?

Options:

A.

IOZone

B.

Iometer

C.

iostat

D.

MiTrend

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Questions 44

When designing a SmartConnect IP pool, what is the recommended IP address pool allocation method and

protocol state for SMB?

Options:

A.

Dynamic, stateful

B.

Static, stateless

C.

Dynamic, stateless

D.

Static, stateful

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Questions 45

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

Options:

A.

4 KB

B.

8 KB

C.

16 KB

D.

32 KB

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Questions 46

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

Options:

A.

MediaScan

B.

IntegrityScan

C.

Dynamic Sector Repair

D.

Isilon Data Integrity

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Questions 47

You are working with a healthcare company that is interested in replacing all the backend storage for their PACS system.

In general, how should the solution be presented to the customer?

Options:

A.

VNX for image cache; Isilon NL-Series nodes for image archive

B.

Isilon A-Series nodes for image cache; Isilon NL-Series nodes for image archive

C.

Isilon NL-Series nodes for image cache and image archive

D.

VNX for image cache and image archive

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Questions 48

Your customer is moving from a Restaurant/Bar business model to a Restaurant/Casino business model. You are helping architect the upgrade of a current 4-node X200 48 TB Isilon cluster, with 50% utilized for their video surveillance operations.

They want to upgrade from 15 FPS (NTSC) in H.264 codec, with a 15 days retention policy to 30 FPS (NTSC) in H.264 codec, with a 30 days retention policy.

How many nodes of the same type will you need to add in order to meet the required changes and not exceed 70% raw capacity?

Options:

A.

8 nodes

B.

4 nodes

C.

12 nodes

D.

16 nodes

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Questions 49

What replication option is NOT supported by SyncIQ?

Options:

A.

Within the same local cluster

B.

Across WAN to single remote cluster

C.

Across InfiniBand to secondary local cluster

D.

Across LAN to secondary local cluster

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Questions 50

-- Exhibit --

A European Sports TV network is considering Isilon for their Media Edit Storage for their editing workloads. They are also considering Isilon for near-line media archiving.

The network receives XDCAM HD footage which is loaded onto their existing Transcoding Storage platform. New footage that needs to be edited will be transferred from their Transcoding Storage platform to the proposed Media Edit Storage platform at the rate of ten simultaneous XDCAM HD files via FTP. Edited files will be transferred back to the Transcoding Storage platform at the rate of ten simultaneous XDCAM HD files via FTP.

The network currently has 15 Final Cut Pro edit stations, 15 Avid edit stations. Proxy software will be used to allow Isilon to act as the storage for the Final Cut Pro and Avid media. Three of those edit stations will be performing content compositing as needed.

The network expects 70 hours of new content per week, and 50 hours of edited content per week. They intend to keep the new and edited content on the proposed Media Edit Storage as a performance tier for 30 days. They would like to retain all new and edited footage proposed Media Edit Storage as a near-line tier for two years.

In addition to the current workloads, the network expects to implement a new Media Asset Management (MAM) solution and has requested the Isilon cluster be capable of supporting 120 MBps read and 120 MBps write to support the MAM requirements.

-- Exhibit --

Refer to the exhibit.

Based on the described use of the cluster, what are the customer's capacity requirements?

Options:

A.

30 days retention: 15 TB; 2 years retention: 360 TB

B.

30 days retention: 5 TB; 2 years retention: 120 TB

C.

30 days retention: 1 TB; 2 years retention: 24 TB

D.

30 days retention: 30 TB; 2 years retention: 720 TB

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Questions 51

An Isilon customer has an 8-node cluster of older X-Series nodes. They plan to upgrade the nodes over the next three years in the following stages:

  • Stage 1: Add 2 X-Series nodes to meet performance growth
  • Stage 2: Add 4 NL-Series nodes to meet archive capacity growth
  • Stage 3: Add 10 New X-Series nodes as a hardware refresh
  • Stage 4: Remove older X-Series nodes

At which point will a SmartPool license be required?

Options:

A.

Stage 1

B.

Stage 2

C.

Stage 3

D.

Stage 4

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Exam Code: E20-555
Exam Name: Isilon Solutions and Design Specialist Exam for Technology Architects
Last Update: May 24, 2024
Questions: 344

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