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EMC E20-555 Dumps

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Total 344 questions

Isilon Solutions and Design Specialist Exam for Technology Architects Questions and Answers

Question 1

How is the journal protected in Gen 6 hardware?

Options:

A.

Identical copy is maintained on all nodes of the cluster

B.

Identical copy is maintained on both nodes of each node pair

C.

Each node has a mirrored M.2 vault

D.

Each node has a mirrored write cache

Question 2

Which cache type contains data blocks from previous read and write transactions?

Options:

A.

Metadata stored on SSDs

B.

L2 cache

C.

L1 cache

D.

L3 cache

Question 3

A potential customer is considering replacing a four year old, Linux-based NFS server with 40TB of usable capacity. The existing system supports home directories, an internal website, and a content repository for the customer's content management system. The customer is concerned about performance of any new solution because they expect to double workload in the content management system.

What tools can be used to collect performance data needed to size the new solution?

Options:

A.

Iostat and nfsstat

B.

Perfmon and sysstat

C.

Isi statistics and Wireshark

D.

Syslog and vmstat

Question 4

An Isilon has two ports configured per node. Each port is on a different VLAN. Although incoming traffic is evenly distributed, transmitted data from the Isilon uses one port more than the other port. What could be the cause of this imbalance?

Options:

A.

Static routes are configured on the less-used port

B.

A default gateway was not configured on both ports

C.

Source Based Routing is not enabled on the cluster

D.

Priority of the gateway in the less-used port set too low

Question 5

Which tool measures actual throughput and produces sophisticated graphs?

Options:

A.

MiTrend

B.

WireShark

C.

Perfmon

D.

IOZone

Question 6

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?

Options:

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

Question 7

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

Options:

Question 8

How are clients, L1 cache, L2 cache, and disks interconnected?

Options:

A.

Clients connect to L1 Cache and write coalescer

L1 cache is connected to L2 on the local node

L2 cache connects to disks on all nodes via internal network

B.

Clients connect to L2 Cache and write coalescer

L1 cache connects to disks on all nodes via internal network

L2 cache is connected to L1 on the local node

C.

Clients connect to L2 Cache and write coalescer

L1 cache connects to disk on its local node

L2 cache is connected to L1 on all nodes via internal network

D.

Clients connect to L1 Cache and write coalescer

L1 cache is connected to L2 on all nodes via internal network

L2 cache connects to disks on its local node

Question 9

When a client requests a file to read from an Isilon cluster, in which order does the read operation access the hardware in a node?

Options:

A.

Endurant Cache, L1 cache, disk

B.

L2 cache, L1 cache, disk

C.

Disk, L2 cache, Endurant Cache

D.

L1 cache, L2 cache, disk

Question 10

A customer wishes to back up their Isilon cluster via NDMP using a software package that supports NDMP

connectivity. The backup process will require the cluster to create a point-in-time copy of the directory to be

backed up.

Which OneFS feature(s) will need to be licensed?

Options:

A.

NDMP only

B.

No additional licenses are required

C.

SnapshotIQ only

D.

SnapshotIQ and NDMP

Question 11

-- Exhibit --

A large manufacturing company is an existing Isilon customer with a cluster consisting of four NL400 nodes with 4TB drives. The cluster is using N+2:1 protection level and the file system shows that it is 60% utilized. Home directories and file shares comprise 75% of the existing content and the remainder is inactive deep archive. The company has 1,000 employees using Windows and Mac clients participating in a single Active Directory (AD) forest.

During a meeting with the CIO and Director of IT you discuss the company’s recent acquisition – an engineering firm that specializes in Computer Aided Design (CAD). The engineering firm has 400 UNIX workstations that produce technical drawings which are currently stored on another vendor’s SAN solution. The all UNIX environment uses NIS for authentication and name resolution. They do not currently use DNS or LDAP. The engineering company has an old storage system that has been experiencing problems and the CIO would like you to migrate the data onto the Isilon cluster. The CIO would like to eliminate all tape and recover the data onto disk.

The CIO is concerned about security of the company’s intellectual property, especially with the rapid adoption of mobile devices and external cloud content sharing services such as DropBox, Egnyte, and SugarSync. They would like to implement an alternative that provides external file sharing and mobile device synchronization while maintaining security control over the company’s data.

The Director of IT reports that users are storing non-work related content on the Isilon cluster. They would like to limit the amount of capacity that each user can consume in their home directory and want to ensure you provide the capability to easily visualize which users are over their allotment.The company’s Windows users currently leverage Windows Shadow Copy to recover files that have been accidentally deleted. The IT department wants to ensure that Mac and incoming UNIX clients have the same functionality.

The Director of IT also mentions that users are reporting slow response times when browsing their home directories and shared folders. They are concerned that Isilon cannot scale to support their combined requirements.

-- Exhibit --

Which Isilon license options are required to meet the customer's needs?

Options:

A.

SnapshotIQSmartQuotasSyncplicity EEInsightIQSmartPools

B.

SnapshotIQSmartConnect AdvancedSmartQuotasSyncIQInsightIQSmartPools

C.

SnapshotIQSmartQuotasSyncplicity EESyncIQInsightIQSmartPools

D.

SnapshotIQSmartQuotasSmartLockSyncIQInsightIQ

Question 12

Using Isilon SnapshotIQ, how many snapshots can be created at the directory level?

Options:

A.

8

B.

96

C.

256

D.

1024

Question 13

Which types of reports are available from InsightIQ?

Options:

A.

Auditing and file system

B.

Auditing and security

C.

Performance and file system

D.

Performance and security

Question 14

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 Applications access this storage?

B.

What type of racks are in your datacenter?

C.

Are you using a KVM to access your storage?

D.

How many NICs do your clients have?

Question 15

A four-node Isilon cluster is being used in a Hadoop workflow with a parity protection of N+2:1. The HDFS protocol has been enabled and is being used to access data.

How many additional copies of data are written into the Isilon cluster using HDFS?

Options:

A.

None

B.

One

C.

Three

D.

Two

Question 16

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

Options:

A.

sysct1

B.

isi_tardis

C.

isi_for_array

D.

gconfig

Question 17

An Isilon customer has set up a replication policy between a primary cluster and a secondary cluster. After the initial synchronization of the clusters, the primary cluster starts to display some issues. The customer initiates a failover operation between the two clusters.

During the failover, the primary cluster becomes fully operational again. The customer wants to stop the failover operation between the two clusters.

What is the best way to stop the failover operation and continue using the primary cluster?

Options:

A.

Initiate a failover revert on the secondary cluster

B.

Initiate a failover revert on the primary cluster

C.

Nothing; this is an automatic process

D.

Delete the primary clusters' snapshot of this data

Question 18

A cost-conscious customer is exploring Isilon for their PACS archive. The workflow consists of one hundred cases a day, each including fifty 60MB image files. However, each image will have five-hundred 64kB metadata files associated with it. They currently have six years worth of archived data. They will need to migrate to the new solution and they need to plan for an additional three years of archive capacity.

Which solution would you recommend to fit their capacity needs?

Options:

A.

24 NL-Series nodes with N+3 protection policy providing 2597 TiB of useable capacity

B.

18 NL-Series nodes with N+2:1 protection policy providing 2078 TiB of useable capacity

C.

24 X-Series nodes with N+3 protection policy providing 2597 TiB of useable capacity

D.

12 NL-Series nodes with N+2 protection policy providing 1300 TiB of useable capacity

Question 19

Which Isilon feature provides the ability to build a cluster using different node types and tiers to meet a customer's business objectives?

Options:

A.

SmartPools

B.

SmartQuota

C.

SmartConnect

D.

SnapshotIQ

Question 20

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.

Question 21

A potential customer requires 800 TB of usable capacity to store medical images for their network of health clinics. The IT department has limited staff and currently manages four storage arrays from other vendors. During a meeting with the Director of IT you learn that the company is considering a solution from a competitor of EMC using two of the existing arrays and two new arrays.

Which Isilon capabilities would show a better ROI for the customer?

Options:

A.

Isilon has 6%-12% less filesystem overhead than traditional clustered filesystem solutions.With a single filesystem and virtual capacity for drive and node failures, Isilon utilization is typically 80% or higher.Isilon utilization is typically 80% or higher due to use of a single filesystem and virtual capacity for drive and node failures.

B.

With a single filesystem and virtual capacity for drive and node failures, Isilon utilization is typically 80% or higher.OneFS compression results in higher effective capacity within the cluster.Traditional clustered filesystems require 4%-10% internal overhead compared to Isilon virtual capacity.

C.

Forward Error Correction overhead is 7% lower than traditional RAID.Isilon has 6%-12% less filesystem overhead than traditional clustered filesystem solutions.According to an IDC study, Isilon improves IT productivity by nearly 50% compared to traditional competitors.

D.

Isilon has 15%-20% less overhead than traditional clustered filesystems.According to an IDC study, Isilon utilization is nearly 50% higher than traditional competitors.Isilon QOS headroom and multiple node pools ensures consistent performance up to 80% utilization.

Question 22

How are files smaller than 128 KB protected?

Options:

A.

3x mirrored

B.

N+3d:1n

C.

N+2d:1n

D.

2x mirrored

Question 23

On an 18-node Isilon cluster with the default protection setting, what is the actual layout of a 128 KB file?

Options:

A.

2x

B.

N+2n

C.

3x

D.

N+2d:1n

Question 24

Which operational consideration is used in the Isilon Sizing Tool to determine the recommended data

protection?

Options:

A.

MTTR

B.

MTTRC

C.

MTTDL

D.

MTBF

Question 25

-- 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 –

The customer wants to be able to put completed content into a non-editable folder. However, they want to give access to an administrator to delete content if required. What do you recommend to the customer?

Options:

A.

SmartLock using Enterprise mode

B.

SmartLock using Compliance mode

C.

WORM using Compliance mode

D.

SyncIQ with read-only mode

Question 26

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?

Options:

A.

iostat and nfsstat

B.

MiTrends and netmon

C.

netstat and esxtop

D.

Wireshark and sysstat

Question 27

A customer needs to be able to periodically monitor their node live performance for ongoing operational tasks as well as during problem analysis. You have recommended they use the isi statistics command to fulfill this need.

What types of statistics and statuses could be displayed with this command?

Options:

A.

Protocol status, drive statistics, hardware statistics, node statistics

B.

Node alerts, Job Engine statistics, hardware status, protocol statistics

C.

Node statistics, general status, drive status, hardware statistics

D.

Drive statistics, node status, protocol alerts, general performance

Question 28

A potential customer has about 540TB of NetApp running in ONTAP 7-Mode. They are willing to let you gather some workload data. They have LDAP and Active Directory authentication and primarily Windows Clients. They are very interested in Automated Tiering and Large Scale Archives. They are not certain about the workflows from the Marketing Department. The Content Team will only say they need to acquire 300 TB within 90 days. They do not know the average file size or the number of aggregates they are managing.

Which tools would you use to gather information to do your Isilon sizing?

Options:

A.

MiTrend WPA, Autosupport, and PerfCollect

B.

isi status, isi_netlogger, and PerfMon

C.

Wireshark, isi statistics, and iostat

D.

Isilon Insight IQ, OnCommand Insight, and nfsstat

Question 29

A customer has an Isilon cluster with 6 nodes and a single 4-core CPU per node. The default configuration for SyncIQ workers per CPU core and SyncIQ workers per node per job limits are used.

How many SyncIQ workers are available for the Isilon cluster?

Options:

A.

24

B.

64

C.

96

D.

192

Question 30

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

Question 31

-- 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?

Options:

A.

9.6 TB

B.

4.8 TB

C.

1.2 TB

D.

14.4 TB

Question 32

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

Question 33

How many impact policy levels are available when configuring Isilon jobs?

Options:

A.

2

B.

3

C.

4

D.

5

Question 34

A customer has a 7-node Isilon cluster configured with N+2:1 protection. How many nodes can be offline with the data accessible and fully writeable?

Options:

A.

1

B.

2

C.

3

D.

0; all nodes must be online

Question 35

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

Question 36

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

Options:

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

Question 37

What key considerations should be kept in mind when designing a 300TB solution?

Options:

A.

Workflow managementDefining class of serviceTime of day servicesRPO and RTOData retention and backup

B.

Defining class of serviceTime of day servicesROI and TCOData retention and backup

C.

SmartPoolsSmartconnectSnapshotsSpace for snapshots

D.

Always include 2% SSDSmartPoolsSmartconnectSnapshotsInsightIQ

Question 38

If SmartPools is unlicensed on a cluster, which features are NOT enabled?

Options:

A.

Specify spill over target, automatic node pool provisioning

B.

Metadata acceleration setting, GNA

C.

File pool policy filters, specify spill over target

D.

File pool policy filters, snapshot target

Question 39

A customer plans to migrate data to a remote Isilon cluster. What is a consideration when configuring a cluster

with SyncIQ and hard SmartQuotas?

Options:

A.

SyncIQ ignores quota limits during replication but if a quota is over limit, quotas will still allow users to add

data to the directory.

B.

Quotas should be configured on both SyncIQ source and target directories prior to a migration.

C.

SyncIQ will replicate source quota configurations to the target.

D.

Quotas should be set only on source directories and never on target directories for migrations.

Question 40

Refer to the exhibit.

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

Options:

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

Question 41

What accurately represents Isilon SyncIQ Automated Failover?

Options:

A.

SmartLock directories will automatically failover

B.

Replication relationships will change upon failover

C.

No changes in Identity Management will be needed

D.

Target directories will not need to be shared with clients

Question 42

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

Question 43

Which type of link aggregation is supported with Isilon nodes?

Options:

A.

Aggregation of up to eight similar ports in the same cluster

B.

Aggregation across Ethernet ports in a node

C.

Aggregation of 10 GbE and 40 GbE ports

D.

Aggregation across two or four nodes

Question 44

A new customer is interested in an Isilon Gen 6 solution to replace their sprawling and outdated Linux

environment. Which client tool should you use to establish an estimate of the workload and pattern as an input to the sizing process?

Options:

A.

tcpdump

B.

lometer

C.

File System Analytics

D.

iostat

Question 45

An Isilon customer wants a job to periodically validates the checksum of every block in the file system. What should be recommended to the customer?

Options:

A.

IntegrityScan

B.

MediaScan

C.

Dynamic Sector Repair

D.

Isilon Data Integrity

Question 46

What is an accurate statement when configuring an Isilon Gen 6 cluster with Compliance SmartLock?

Options:

A.

Standard directories containing data can be converted to a Compliance SmartLock directory

B.

SmartLock compliance directories can only be migrated from the recovery cluster

C.

Compliance directories have a system clock that is set once and cannot be changed after being set

D.

Failback of SmartLock compliance mode directories is not supported for Isilon Gen 6 clusters

Question 47

What is the overhead impact on the physical capacity when configuring data protection at +2:1 on a 6-node Isilon cluster?

Options:

A.

1/2

B.

1/4

C.

1/5

D.

1/6

Question 48

A customer is considering using the CloudPools feature to send archive data to their on premises object

storage appliance. The customer needs to know how many objects will be created by the Isilon when it tiers

files using CloudPools.

If the customer has 20 1MB files, 2 10MB files and 4 3MB files, how many objects will CloudPools version 1.0

create?

Options:

A.

26

B.

52

C.

336

D.

5376

Question 49

A customer has a requirement for a new solution to handle their growing storage requirements. The solution should have the ability to cover storage needs for the next three years. The environment consists of 100 TBs of file system data spread across five file systems. On average, the file systems grow 1 TB a month. In addition, they have a large VMware cluster supporting 200 VMs and a highly transactional database.

The customer wants the solution to offer good performance, scalability, manageability, and be cost-effective. The sales team is looking to you to recommend a solution.

Which recommendation will meet the customer’s requirements?

Options:

A.

VNX for DB and VMware workloads, and Isilon for file system data

B.

Isilon scale-out and cluster as required

C.

VNX Unified platform with FAST Cache

D.

VMAX with FAST VP and a NAS Gateway

Question 50

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.

Where will the data center be installed?

B.

How many concurrent clients are accessing your NAS?

C.

How many users are in your Directory Services?

D.

Are you currently using a UPS for your main power source?

Question 51

Refer to Exhibit below:

What is represented by the information shown in the exhibit?

Options:

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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Total 344 questions