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

Question # 4

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?

A.

1

B.

2

C.

3

D.

0; all nodes must be online

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Question # 5

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.

Use LACP to aggregate the network ports on each node.

B.

Use jumbo frames to compensate for the 1GB Core network.

C.

Aggregate Infiniband (IB) ports across all nodes.

D.

Bond EXT-0 across all nodes.

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Question # 6

You have gathered information from your customer about their current NAS environment. They indicated they are having performance and time-out issues with their clients accessing the storage. Currently over 5000 clients are simultaneously accessing the NAS; however, this will double in the next year.

Based on this information, what recommendations for a new Isilon cluster would you give to the customer based on this information?

A.

Create a six node X400 cluster today. As additional clients are added, add additional X400 nodes for them.

B.

Create a seven node X400 cluster today. You will not need to purchase additional nodes as more clients are added.

C.

Create a three node cluster today. As more clients are added, add three additional nodes each time for 1000 clients.

D.

Create a five node X400 cluster today. As more clients are added, add a Performance Accelerator node for every 1000 clients.

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Question # 7

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 # 8

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

A.

RBAC

B.

SmartConnect

C.

SmartLock

D.

SmartQuota

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Question # 9

If a client is mounted to the sixth node in a 20-node Isilon cluster, how much memory cache can that client leverage assuming each node has 8 GB of memory cache?

A.

16 GB

B.

40 GB

C.

120 GB

D.

160 GB

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Question # 10

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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Question # 11

When a Gen 6 Isilon cluster receives a file to be stored, which node(s) performs the FEC calculation?

A.

First node in each node pair

B.

Node that will be holding the FEC

C.

Node to which data was initially sent

D.

Each node in the cluster

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Question # 12

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?

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

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Question # 13

What is the behavior of the Isilon time and date settings and what is the best practice?

A.

SMB time sync takes precedence over the NTP service

SMB time is enabled by default on the cluster

Best Practice: do not use SMB time, use NTP for cluster and Domain Controller

B.

NTP service takes precedence over SMB time sync

SMB time is enabled by default on the cluster

Best Practice: do not use NTP time, use SMB for cluster and Domain Controller

C.

NTP service takes precedence over SMB time sync

SMB time is enabled by default on the cluster

Best Practice: do not use SMB time, use NTP for cluster and Domain Controller

D.

SMB time sync takes precedence over the NTP service

SMB time is not enabled by default on the cluster

Best Practice: do not use NTP time, use SMB for cluster and Domain Controller

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Question # 14

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?

A.

tcpdump

B.

lometer

C.

File System Analytics

D.

iostat

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Question # 15

When conducting high-level interviews with stakeholders of a project, what are the key questions that should be asked?

A.

How much usable storage are you looking for?What client OS will access this storage?Which applications will access this storage?

B.

Which backup application is in use today?What is your change rate?How many clients will connect to the cluster?

C.

What does your network architecture look likeDo you have existing NAS infrastructure?Do you have 10Gb or 1GbWhich applications will access this storage?

D.

Who are the application owners?How much usable storage is needed?What applications will be accessing the storage?How many users are in your Active Directory?

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Question # 16

An Isilon customer wants the ability to provide low latency I/O for their files due to a workflowinvolving small, random reads and writes. Which SSD strategy is most effective for this use case?

A.

Data on SSDs

B.

Metadata read acceleration

C.

Metadata read/write acceleration

D.

Avoid SSDs

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Question # 17

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

A.

0%

B.

5%

C.

10%

D.

20%

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Question # 18

When designing Isilon solutions, which issue should you pay special attention to?

A.

Meet customer expectations

B.

Create a workflow document

C.

Conduct stakeholder interviews

D.

Follow all SSD sizing rules

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Question # 19

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

protocol state for SMB?

A.

Dynamic, stateful

B.

Static, stateless

C.

Dynamic, stateless

D.

Static, stateful

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Question # 20

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?

A.

Iostat and nfsstat

B.

Perfmon and sysstat

C.

Isi statistics and Wireshark

D.

Syslog and vmstat

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Question # 21

A customer's cluster contains three X200 (24 GB RAM, 3 TB drives) nodes, and three X400 (48 GB RAM, 1 TB drives) nodes. All nodes are configured in a single pool. All data is protected at N+2. After upgrading OneFS to 7.0, the Isilon Web interface indicates that files are not fully protected.

What should be done to correct this situation?

A.

Recreate the original pool using the Isilon Web interface

B.

Add 24 GB RAM to each of the X200 nodes

C.

Recreate the original pool using the command line interface

D.

Add two X200 nodes and two X400 nodes

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Question # 22

An Isilon cluster component has the following characteristics:

  • Spans 3 - 40 nodes
  • Logical grouping of drives
  • Automatically assigned
  • Intelligently distributes disks to manage performance

Which cluster component is described?

A.

Disk pool

B.

Node pool

C.

Smart pool

D.

SSD pool

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Question # 23

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 # 24

Given a 5-node Isilon cluster configured with an N+2 protection level, how many nodes can be offline with the data accessible and fully writeable?

A.

1

B.

2

C.

3

D.

None

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Question # 25

What is the correct order of steps taken during the file striping process?

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Question # 26

A customer environment is used for analytics on very large datasets. They are interested in using Isilon storage and Hadoop but are concerned about the costs.

How does Isilon change the scalability of a Hadoop environment?

A.

JobTracker and TaskTracker are offloaded to the Isilon cluster

B.

DataNode and TaskTracker are offloaded to the Isilon cluster

C.

NameNode and DataNode are offloaded to the Isilon cluster

D.

NameNode and JobTracker are offloaded to the Isilon cluster

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Question # 27

You are reviewing an opportunity with a trusted advisor. You both discover gaps in the initial solution design.

Each iterative discussion with the customer helps you define the solution better. The documents produced capture the customer's requirements.

What else needs to occur to refine the sizing considerations?

A.

Validate the Workflow Profile Assessment and test the solution against your findings.

B.

Review you assumptions and ask the customer what business issue you're solving.

C.

Provide the CIO with the findings and gain commitment to a Proof of Concept.

D.

Complete your Solution Design Document and forward to EMC consulting.

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Question # 28

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.)

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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Question # 29

A customer created eight SyncIQ policies on a 6-node Isilon cluster. The policies all start at midnight. The customer is experiencing issues where several jobs are paused while others continue to run. This is delaying the overall replication of data.

What is the most likely reason for the pausing of some of the SyncIQ jobs?

A.

An Isilon cluster can only have five concurrent SyncIQ jobs running at the same time.

B.

An Isilon cluster can only have one SyncIQ job running at any one time.

C.

SyncIQ only allows one job per node. This cluster can only run six SyncIQ jobs concurrently.

D.

SyncIQ will stagger the start of all SyncIQ jobs. Jobs after the first job are delayed.

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Question # 30

In an Isilon environment, which event will avoid Dynamic IP Address reallocation?

A.

Client is added to the cluster

B.

Failure of the back-end network

C.

Node reboot

D.

Cluster split

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Question # 31

Which Isilon product is recommended where low-latency and maximum performance is a critical factor?

A.

X-Series

B.

S-Series

C.

SmartQuotas

D.

NL-Series

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Question # 32

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 # 33

Refer to the exhibit.

You want to add redundancy to your network configuration, rather than performance. You have configured all interfaces into the default SmartConnect zone.

How should you configure the switches and Isilon networking to provide your desired network redundancy?

A.

Configure the switch ports for LACP and use LACP aggregation for subnet0:pool0.

B.

Configure the switch ports as access points and use LACP aggregation for subnet0:pool0.

C.

Configure the switch ports for LACP and use FEC aggregation for subnet0:pool0.

D.

Configure the switch ports as access points, bond ext-0 and ext-1 on all nodes and use Active/Passive aggregation for subnet0:pool0.

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Question # 34

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 # 35

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?

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.

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Question # 36

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

A.

Job task

B.

Job priority

C.

Job impact policy

D.

Job phase

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Question # 37

A NetApp customer is considering Isilon. They use their filers for UNIX home directories, and would like to see a suggested configuration that would meet their needs.

What would you do to help size this cluster?

A.

Ask for an autosupport file and upload it to MiTrends to generate a workflow profile

B.

Ask them to install InsightIQ and collect data from the filer, then import to SQL for analysis

C.

Ask for the output from nfsstat and upload it to MiTrends to generate a workflow profile

D.

Use tcpdump and upload the output file to MiTrends to generate a protocol analysis

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Question # 38

How many files can reference a single block within a shadow store?

A.

8

B.

128

C.

512

D.

32,000

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Question # 39

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 # 40

A customer has two data centers (Site A and Site B). There is an Isilon cluster in each data center and they use SyncIQ to replicate data between the two data centers.

You have been reviewing their disaster recovery plan and found the following:

  • The policies specify that SyncIQ runs a replication job every 2 hours and that the job finishes within 1 hour.
  • Three additional hours will be needed to get servers and the network redirected to work from Site

What is the Recovery Point Objective in this plan?

A.

2 Hours

B.

3 Hours

C.

4 Hours

D.

5 hours

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Question # 41

An Isilon customer has two 5-node clusters; one for production and one for disaster recovery (DR). The customer's workflows are replicated to the DR cluster through SyncIQ on individual schedules. They shut down their production cluster for a scheduled DR test, failed over to the DR cluster, and continue their DR testing.

Assume both clusters have identical shares, exports, and user authentication. Additionally, assume the client applications have been stopped and the DNS re-pointed. Which SyncIQ Policy method should be used to continue production operations?

A.

Revert

B.

Initiate Manual Failback

C.

Initiate Automated Failback

D.

No change is needed

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Question # 42

When designing Isilon solutions, what issues should you pay special attention to?

A.

Avoid being too enthusiastic over the technologyBalancing technical and business requirementsProvide OptionsDesign to meet customer expectations

B.

Workflow DocumentSolutions DocumentApplication typesData strategy

C.

Solutions DocumentBalancing technical and business requirementsProviding many optionsPractical vs. theoretical implementations

D.

Solutions DocumentBalancing technical and business requirementsDownstream hand-offDesign to meet customer expectations

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Question # 43

What is a consideration when designing access zones?

A.

Authentication providers are restricted to one specific zone

B.

UID/GID ranges should not overlap for providers in the same zone

C.

Access zones cannot overlap the same directories

D.

Share names must be unique between different access zones

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Question # 44

In an Isilon environment, how is InsightIQ installed?

A.

Deployed as a virtual appliance

B.

Installed on a FreeBSD server

C.

Deployed on a Windows 64-bit server

D.

Installed on an Isilon cluster

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Question # 45

What are attributes of SFTP?

A.

Uses FTP protocol

Uses port 22

Requires client software

B.

Uses FTP protocol

Uses port 990

Requires client software

C.

Does not use FTP protocol

Uses port 990

Does not require client software

D.

Does not use FTP protocol

Uses port 22

Requires client software

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Question # 46

When working with Isilon file pool policies, which file attribute can be applied as a filter?

A.

Performance

B.

File create date

C.

File type

D.

Permissions

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Question # 47

-- 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?

A.

SmartLock using Enterprise mode

B.

SmartLock using Compliance mode

C.

WORM using Compliance mode

D.

SyncIQ with read-only mode

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Question # 48

An Isilon customer is experiencing less than expected performance and poor space utilization with their cluster. They are using the X400 nodes with an N+2d:1n protection policy to host web server log data. Upon further analysis, the customer discovers that the web servers write log files 64KiB in size. The log files are then accessed by an analytics application for reporting purposes. What should be done to increase the write performance of the cluster?

A.

Change the protection scheme to a mirroring policy

B.

Add S-Series storage nodes to the cluster

C.

Add A-Series Performance Accelerator nodes to the cluster

D.

Change the SSD strategy on the cluster

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Question # 49

An Isilon customer wants to have different snapshot policies and schedules on the same directory. Why is this possible on an Isilon cluster?

A.

SnapshotIQ snaps at the directory level rather than the volume level

B.

All snapshots are scheduled through the command line interface

C.

A third-party product is used by SnapshotIQ to create different schedules and policies on a directory

D.

SnapshotIQ snaps at the volume level rather than the directory level

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Question # 50

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?

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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Question # 51

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?

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?

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