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

Question # 4

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?

A.

1

B.

2

C.

4

D.

6

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Question # 5

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?

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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Question # 6

-- 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 --

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

What would result in the fastest possible network throughput?

A.

Move analysis infrastructure to dedicated 10G network.

B.

Add four A-Series accelerator nodes.

C.

Use LACP to aggregate the network connections.

D.

Implement jumbo frames.

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Question # 7

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

A.

Perform Disk Tango

B.

Perform a disk SmartFail

C.

Perform FlexProtect

D.

Perform a node SmartFail

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Question # 8

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?

A.

Latest retention period

B.

Earliest retention period

C.

File-level retention

D.

Directory-level retention

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Question # 9

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.

What mechanism are you using for NFS authentication?Do you have multiple AD domain support?What versions of LDAP are supported?

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 flavor of LDAP is supported?

D.

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?

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Question # 10

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

A.

External protocols

B.

Isassd daemon

C.

External providers

D.

Incoming IP

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Question # 11

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.

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

B.

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.

C.

Dual 10GbE ports on each node will enable throughput of 20Gbps.Only connect half of the nodes to the network.

D.

Maximum performance is obtained by only using a single 10GbE interface per node.Isilon can support up to 400MB/s per node

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Question # 12

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.

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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Question # 13

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?

A.

Create a custom RBAC role

B.

Create a secondary root account credential

C.

Provide the AuditAdmin RBAC role

D.

Provide the SecurityAdmin RBAC role

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Question # 14

How does Isilon SnapshotIQ use storage for snapshots?

A.

Through Changed Block Tracking and only changed data blocks are saved

B.

Works on the file level and saves the entire file no matter what has changed

C.

Works with 4 KiB blocks and will always use that amount of storage, no matter what has changed

D.

Through Changed Block Tracking and always uses a 4 KiB block, even if the data changed is less than that amount

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Question # 15

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

A.

ftpsd

B.

vsftpd

C.

sftpd

D.

ftpd

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Question # 16

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?

A.

Create a cluster configuration specifying HDFS, NFS, and CIFS protocols; select 19 x X400 nodes with 144TB per node, and Enhanced Support

B.

Request the Windows Systems Administration Team run a PerfMon analysis on the Marketing Servers, consider adding 75 x 3TB drives to your VNX 5500, and contact the DBA Team for their help

C.

Ask them to identify how the current data is accessed, where the data is accessed from, and who is accessing the data

D.

Send the Social Media Team a sizing and features spreadsheet to complete; download the OneFS Architectural White Paper for them, and create a Logical System diagram in Visio

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Question # 17

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?

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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Question # 18

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

A.

500

B.

1,000

C.

1,500

D.

2,500

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Question # 19

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?

A.

Two-way including a Backup Accelerator

B.

Three-way without a Backup Accelerator

C.

Three-way including a Backup Accelerator

D.

Two-way without a Backup Accelerator

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Question # 20

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?

A.

Add X-Series nodes to the cluster, and use SmartPools to migrate inactive data to the NL-Series nodes.

B.

Use the Isilon Sizing Tool to determine GNA requirements, and add NL-Series nodes with SSD to the cluster.

C.

Add a VNX Unified array for the new project, and use rsync to migrate data to the Isilon cluster for archiving.

D.

Add A-Series nodes to the cluster to boost combined network performance.

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Question # 21

Refer to the exhibit.

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

A.

nfsstat and write-intensive access

B.

iostat and write-intensive access

C.

Read-intensive access and nfsstat

D.

isi_netlogger and moderate metadata read operations

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Question # 22

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

A.

sysct1

B.

isi_tardis

C.

isi_for_array

D.

gconfig

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Question # 23

What is a Shadow Store used for in Isilon OneFS?

A.

Shared data for clones and original files

B.

Changed block data for clones and original files

C.

Changed block data for SyncIQ

D.

Changed blocks for SnapshotIQ

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Question # 24

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

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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Question # 25

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

A.

Facilitates independent scaling of compute and storage nodes

B.

Provides single protocol access to data

C.

Integrates storage into Hadoop compute for more flexibility

D.

Allows the compute nodes to apply data protection

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Question # 26

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

A.

4 KB

B.

8 KB

C.

16 KB

D.

32 KB

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Question # 27

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

A.

SmartLock, HDFS, SmartPools and SmartQuotas

B.

SmartPools, HDFS, 10 GigE support and SmartQuotas

C.

SyncIQ, SmartLock, HDFS and SmartConnect

D.

SyncIQ, Antivirus, 10 GigE support and HDFS

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Question # 28

Refer to the Exhibit.

What is represented by the information shown?

A.

Directory quota cannot exceed 2 TB for both /ifs/data/media and/ifs/data/media/photo.Directory quota cannot exceed 900 GB for /ifs/data/media/video.Directory quota can be any size up to 2 TB and each user can only store 75 GB for /ifs/data/media/temp.

B.

Directory quota cannot exceed 2 TB for /ifs/data/media and no quota limit on/ifs/data/media/photo.Directory quota cannot exceed 900 GB for /ifs/data/media/video.Directory quota can be any size up to 2 TB and each user can only store 75 GB for /ifs/data/media/temp.

C.

Directory quota cannot exceed 2 TB for both /ifs/data/media and /ifs/data/media/photo.Directory quota cannot exceed 900 GB for /ifs/data/media/video.Directory quota can be any size up to 2 TB for /ifs/data/media/temp.

D.

Directory quota cannot exceed 2 TB for both /ifs/data/media and /ifs/data/media/photo.Directory quota cannot exceed 900 GB for /ifs/data/media/video.Directory quota can be any size up to 900 GB and each user can only store 75 GB for /ifs/data/media/temp.

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Question # 29

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.

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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Question # 30

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.

Wireshark

B.

ClarityNow!

C.

IOZone

D.

lometer

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Question # 31

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?

A.

320 KiB

B.

448 KiB

C.

576 KiB

D.

640 KiB

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Question # 32

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

A.

3 and 144

B.

3 and 288

C.

4 and 144

D.

4 and 288

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Question # 33

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?

A.

NL400 with 48GB RAM and no SSDs per node

B.

X400 with 96GB of RAM and no SSDs per node

C.

X400 with 24GB RAM and 1.6TB of SSD per node

D.

X200 with 24GB of RAM and 1.2TB of SSD per node

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Question # 34

Which impact policies are available on an Isilon cluster?

A.

High, Medium, Low, Default

B.

High, Medium, Low, Paused

C.

High, Medium, Low, Auto

D.

ASAP, High, Medium, Low

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Question # 35

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

A.

Multiple stream workflows, no prefetching

B.

Multiple clients accessing the same data; aggressive prefetching

C.

Multiple clients accessing the same data; moderate prefetching

D.

Single stream workflows, aggressive prefetching

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Question # 36

-- 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.

9.6 TB

B.

4.8 TB

C.

1.2 TB

D.

14.4 TB

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Question # 37

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.

Copy the CDRs from the source to an Isilon cluster with NFS, then use Hadoop to analyze the information directly over HDFS

B.

Write the CDRs directly to an Isilon cluster with an NFS mount, then use Hadoop to analyze the information directly over HDFS

C.

Copy the CDRs from the source to an Isilon cluster with NFS, then ingest the information into Hadoop for analysis

D.

Write the CDRs directly to an Isilon cluster with an NFS mount, then ingest the information into Hadoop with NFS then analyze

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Question # 38

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?

A.

X-Series nodes, NL-Series nodes, and SmartPools

B.

X-Series nodes and SmartQuotas

C.

S-Series nodes, X-Series nodes, and SmartPools

D.

NL-Series nodes and SmartLock

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Question # 39

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

A.

2 KB

B.

4 KB

C.

6 KB

D.

8 KB

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Question # 40

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

A.

MediaScan

B.

IntegrityScan

C.

Dynamic Sector Repair

D.

Isilon Data Integrity

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Question # 41

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

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Question # 42

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

A.

N+1

B.

N+2

C.

N+2:1

D.

N+3:1

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Question # 43

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.

Medium, Low, Low

B.

Medium, Medium, Low

C.

High, Medium, Paused

D.

High, High, Low

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Question # 44

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.

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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Question # 45

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.

iostat and nfsstat

B.

MiTrends and netmon

C.

netstat and esxtop

D.

Wireshark and sysstat

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Question # 46

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?

A.

Delete the data from a client directly connected to the cluster

B.

Run the treedelete job with a high impact and high priority during out-of-office hours.

C.

Run the treedelete job with a high impact and high priority during office hours.

D.

Run the treedelete job with the default impact and priority during out-of-office hours.

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Question # 47

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

A.

4 KB

B.

8 KB

C.

16 KB

D.

128 KB

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Question # 48

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?

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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Question # 49

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?

A.

Headroom

B.

IOPS

C.

Latency

D.

Bandwidth

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Question # 50

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?

A.

Random Selection

B.

CPU Utilization

C.

Network Throughput

D.

Connection Count

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Question # 51

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

A.

L3

B.

L2

C.

Endurant

D.

L1

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