E20-555 Online Training Archives

For the examinees who are the first time to participate DELL EMC E20-555 exam, choosing a good pertinent training program is very necessary. Exam4Training can offer a specific training program for many examinees participating in Isilon Solutions and Design Specialist Exam for Technology Architects exam. Our DELL EMC E20-555 Isilon Solutions and Design Specialist Exam for Technology Architects Online Training includes simulation test before the formal examination, specific training course and the current EMC Certification E20-555 exam which has 95% similarity with the real exam. Please add Exam4Training to you shopping car quickly.

Page 1 of 8

1. 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?

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

Isilon scale-out and cluster as required

VNX Unified platform with FAST Cache

VMAX with FAST VP and a NAS Gateway

2. How much space is consumed by a 4 KB file when the file data is written to the Isilon cluster?

4 KB

8 KB

16 KB

32 KB

3. Which type of infrastructure does the Isilon scalable appliance connect to on the front-end?

Ethernet

FICON

Infiniband

Fibre Channel

4. A customer needs to consolidate 300 TB of home directory servers and shared file systems used by development and test groups. A key requirement is to prevent the systems from consuming all free capacity and impacting home directory content.

Which Isilon node configuration should be proposed?

X-Series with SmartQuotas

NL-Series with SmartQuotas

S-Series with InsightIQ

X-Series with SmartPools

5. You are helping a customer create a cost-effective Isilon solution. The customer environment includes high IOPS-intensive, random access file-based applications.

Which Isilon storage node type will meet the customer's needs?

S-Series

NL-Series

X-Series

Performance Accelerator

6. How many layers are in the Isilon clustering architecture?

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

Backup Accelerator

Performance Accelerator

X-Series

NL-Series

8. Which Isilon OneFS job, that runs manually, is responsible for examining the entire file system for inconsistencies?

IntegrityScan

MediaScan

AutoBalance

FlexProtect

9. A customer has a supported cluster with the maximum protection level.

How many simultaneous node component failures can Isilon OneFS sustain while still allowing full access to the entire file system and dataset?

10. A customer wants an N+3 protection level on their cluster.

What is the minimum number of nodes they need to achieve that level of protection?

Page 2 of 8

11. What does Isilon OneFS use to re-write data when a disk read fails?

Dynamic Sector Repair

NVRAM

Isilon Data Integrity

CRC

12. An Isilon customer wants a job to periodically check disk sectors to ensure they can be read.

What should be recommended to the customer?

MediaScan

IntegrityScan

Dynamic Sector Repair

Isilon Data Integrity

13. 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?

IntegrityScan

MediaScan

Dynamic Sector Repair

Isilon Data Integrity

14. A company needs the ability to separate administrative rights from data access rights.

Which Isilon feature enables this functionality?

RBAC

SmartConnect

SmartLock

SmartQuota

15. Which Isilon OneFS administration methods are enforced by RBAC?

Platform API, command line, and web administration interface

Command line, InsightIQ, and web administration interface

SNMP and web administration interface

Command line, web administration interface, and SNMP

16. Independent of protocol, what does Isilon OneFS use to translate identities?

ID mapping stack

Role-based access control

Access Zone

SmartLock

17. Which protocol is integrated with Isilon OneFS to provide on-access file functionality?

ICAP

IANA

HTTPS

REST

18. Which impact policies are available on an Isilon cluster?

High, Medium, Low, Default

High, Medium, Low, Paused

High, Medium, Low, Auto

ASAP, High, Medium, Low

19. 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?

Medium, Low, Low

Medium, Medium, Low

High, Medium, Paused

High, High, Low

20. Which Isilon job has a default priority of '1'?

MultiScan

Media Scan

FSAnalyze

FlexProtect

Page 3 of 8

21. A customer is planning an Isilon deployment for use with their Hadoop environment.

What is one advantage of using Isilon as the HDFS layer?

Facilitates independent scaling of compute and storage nodes

Provides single protocol access to data

Integrates storage into Hadoop compute for more flexibility

Allows the compute nodes to apply data protection

22. A customer has an Isilon cluster that they want to simplify a Hadoop workflow. The workflow analyzes large amounts of log data written to storage using FTP and results are viewed by Microsoft Windows clients?

How can this be achieved?

FTP, SMB, and HDFS NameNode and DataNode protocol support on the same file system to enable each workflow step to access data from the same location avoiding data migration.

SyncIQ to migrate the log data between an Isilon cluster and another Hadoop cluster, to retrieve results from the Hadoop cluster, and to store them in an SMB share.

SmartConnect to direct clients to an external Hadoop NameNode and to SMB shares so data ingest, analytics, and results phases are transparently directed.

FTP and SMB protocol support to provide log ingest and Windows clients; SmartPools will stub to HDFS helping to reduce the frequency of external data migration.

23. A company wants to reduce the footprint in their data center. They recently completed a proof of concept with Hadoop using Direct Attached Storage (DAS) for their Big Data initiative. You have determined that incorporating an Isilon cluster into their Hadoop environment would help in reducing this footprint.

Which Hadoop components can be consolidated onto the Isilon cluster to reduce the footprint?

DataNode and NameNode

DataNode and ComputeNode

ComputeNode and NameNode

NameNode and TaskTracker

24. 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?

8 nodes

4 nodes

12 nodes

16 nodes

25. 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.

Which storage capacity would be the best suited to meet the required changes and utilize 65-75% capacity?

110 TB

80TB

140TB

50TB

26. 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?

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

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

Isilon NL-Series nodes for image cache and image archive

VNX for image cache and image archive

27. You meet with the IT Director of a large single site campus. The IT department has recently taken over Physical Security from the facilities department and plans a complete overhaul of the surveillance solution. They are looking to you as a storage architecture expert to provide the correct amount of storage needed. The IT Director asks you what items they need to provide in order to size this solution.

What data do you require from the customer?

Resolution CODEC Frames Per Second (fps) Number of Devices Retention Time

Pixel Count CODEC Color Sampling Frames Per Second (fps) Number of Devices Retention Time

Pixel Count CODEC Color Sampling Frames Per Second (fps) Number of Devices Video Management System Evidence Collection Period

Bit rate per camera Camera Manufacturer Video Management System Retention Time

28. 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?

None

One

Three

Two

29. Your customer has a new business unit. They are gathering web log files to be analyzed. They are using Hadoop to do the analysis of the logs. The IT department is centrally storing the log files on a 5-node Isilon cluster. They have enabled the Hadoop cluster to access the files directly on the Isilon storage. The nodes are X400's with two SSD drives in each node and 96GB of RAM.

How many DataNodes does the Isilon cluster have?

Five

One

Three

Two

30. 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?

X400 with no SSD and 96GB RAM

X200 with no SSD and 48GB RAM

Mixed X400 48GB RAM and NL400 24GB

X400 with 1.6TB SSD and 24GB RAM

Page 4 of 8

31. Your customer has observed a degradation in response time while browsing for media files within the Production Media folder of the Isilon cluster. That directory now contains over five million files. It was confirmed that there are no network or edit station related causes.

What changes to the Isilon cluster will best accelerate the browsing performance?

Add Solid State Drives (SSDs) to the nodes

Add A-Series Performance Accelerator nodes

Upgrade node access to 10 Gbps

Upgrade RAM on the nodes

32. While validating the value (VTV) with a large educational customer, they have decided they would like to add a Disaster Recovery (DR) site to their existing Isilon environment. The existing cluster contains six X-Series nodes. They plan to have all workflows replicated to the DR site and both clusters will have identical shares, exports, and user authentication. The customer would like to test DR failover every six months by running their production environment from the DR site.

What would you recommend for the DR solution?

SyncIQ and identical cluster at the DR site

SmartConnect and NL-Series nodes at the primary site

SyncIQ and NL-Series nodes at the DR site

Equal number of S-Series nodes at the primary site

33. A hospital is considering using Isilon to store their archived medical images and Genomic Sequencing data. They currently have 56 TB of PACS images and 24 TB of genomic data, and expect to double their capacity requirements this year. They will replicate to a DR cluster, and plan to use N+2 protection. The production workload needs to be run at either site.

Which minimum cluster configuration, at each site, including software, would meet this customer's environment?

Five X400 (2 TB drives) nodes with SyncI

Four NL400 (3 TB drives) nodes with SyncI

Seven X200 (3 TB drives) nodes with SyncIQ and SnapshotIQ

Five X400 (2 TB drives) nodes with SnapshotI

34. 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?

Five NL400 (1 TB drive) nodes

Four NL400 (2 TB drive) nodes

Five X200 (3 TB drive) nodes

Three X400 (3 TB drive) nodes

35. Which protocols are supported by Isilon OneFS for file access?

NFS, HDFS, HTTP, SMB

SMB, HTTP, SMTP, HDFS

HDFS, NFS, iSCSI, SNMP

FTP, NFS, SMB, FC

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

N+1

N+2

N+2:1

N+3:1

37. An Isilon customer expressed an interest in more effectively managing their storage. Specifically, they would like to plan for future growth.

Which tool would allow the customer to forecast capacity requirements?

InsightIQ

Isilon SNMP MIB

SyncIQ

SmartPools

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

SmartPools

SmartQuota

SmartConnect

SnapshotIQ

39. At which level can retention periods be applied with Isilon SmartLock?

Directory

Node

File system

Cluster

40. A customer is trying to get Isilon SyncIQ to run on the two clusters they just purchased.

However, they are experiencing some problems. They have asked you to explain how the SyncIQ licensing works.

What information can be provided to the customer?

SyncIQ license is required on both the source and target clusters

SyncIQ license is required on the source but not on the target cluster

SyncIQ license is required on target but not on the source cluster

SyncIQ license is included in the OneFS license; no additional license is needed

Page 5 of 8

41. Where are file system operations initiated on an Isilon node?

NVRAM

Disk

42. For concurrent I/O, how do SmartCache and Endurant Cache differ?

Endurant Cache sends an acknowledgement to the client immediately after mirroring writes in NVRAM

Endurant Cache waits for acknowledgement from all nodes before copying to L2 cache

SmartCache immediately commits the write to NVRAM on the local node and one peer node

SmartCache uses sub-file, granular locking whereas Endurant Cache locks the entire file

43. Where is caching for disk blocks staged on an Isilon node?

CPU

RAID

44. A customer is looking for a new storage solution to handle their growing storage requirements. The system should be able 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 is looking for a solution that would provide 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?

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

Isilon cluster and scale-out as required

VNX Unified platform with FAST Cache

VMAX with FAST VP and a NAS Gateway

45. What is the relative latency of a cache hit to L1 cache compared to a hit to L2 cache in an Isilon cluster?

10x

25x

46. Where does SmartCache stage its write cache?

SSD

DISK

NVRAM

DRAM

47. Which type of data is stored in Endurant Cache of an Isilon node?

Write

Volume

Read

Protection

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

1/2

1/4

1/5

1/6

49. A customer has 10 nodes in a cluster using N+2 protection.

What is the minimum number of nodes required to be online and in communication with one another to satisfy quorum?

50. In an Isilon cluster for N+2 protection, what is the minimum number of nodes?

Page 6 of 8

51. 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?

0; all nodes must be online

52. What is the minimum number of connected and available nodes required to maintain quorum in a 25-node Isilon cluster?

53. An Isilon customer experienced a node failure. The failure requires that the affected node be permanently removed from the cluster.

What will occur in the cluster upon failure of the node?

OneFS will assume it is a temporary failure and the data will not be protected at the appropriate levels.

Cluster will detect the node failure and automatically begin the SmartFail process.

FlexProtect will be activated and data will be protected at the appropriate levels.

Nothing. When data protection levels are set appropriately, OneFS will always protect data without manual interaction.

54. A customer experiences a system failure on an Isilon storage node. However, the disk drives in the node are not affected.

What is the preferred method for restoring cluster integrity?

Engage EMC support to perform a Disk Tango process to move drives, journal, and boot volumes to a replacement chassis

Allow OneFS to proceed with its automatic SmartFail process to re-protect the failed node

Migrate the disks from the failed node into spare drive bays on other nodes

Initiate a manual SmartFail process on the node as it is not started automatically

55. 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?

320 KiB

448 KiB

576 KiB

640 KiB

56. A customer plans to deploy N+2:1 protection on a 5-node Isilon cluster.

How much capacity will be used to store a 1024 KiB file?

1024 KiB

1280 KiB

1792 KiB

1920 KiB

57. An Isilon customer's administrator created the nested directory structure, shown in the exhibit, using SmartQuotas.

However, a user needs to write an additional 650 GB of data to "/ifs/data/acct/recv".

Which steps will enable the user to complete this task?

Directory1 Quot

Increase to 1400 GB User Quot

Increase to 1000 GB on Subdirectory2

User Quot

Decrease to 650 GB on Subdirectory2 Directory1 Quot

Decrease to 1650 GB

User Quot

Decrease to 400 GB on Subdirectory1 Directory1 Quot

Increase to 1650 GB

Directory1 Quot

Increase to 1350 GB User Quot

Decrease to 1000 GB on Subdirectory1

58. Your customer uses an existing Isilon cluster consisting of five NL-Series nodes to source broadcast media files for playback and streaming.The customer reports that the playback pauses and stutters regularly. It has been confirmed that there are no network or playback system issues.

Which of the choices listed is the appropriate choice to address the playback issues?

Add three or more S-Series Nodes

Upgrade OneFS to the latest version

Enable SmartConnect Advanced

Enable Level 2 Caching

59. 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?

Random Selection

CPU Utilization

Network Throughput

Connection Count

60. If Isilon SmartConnect is being configured in a customer environment, which records are required for a supported implementation?

A SmartConnect Service IP host record and a zone delegation for the SmartConnect zone delegated to the SSIP

An overloaded host record with each SmartConnect zone member's IP address and an SRV record to provide resolution services

A SmartConnect Service IP host record and a corresponding PTR record for each SmartConnect zone

A SOA record for the SmartConnect Service IP and a corresponding CNAME record for each SmartConnect zone

Page 7 of 8

61. A customer currently has 10 HPC nodes. They plan to purchase a 5-node Isilon X400 cluster for an HPC application running on Linux. They will persistent mount the Isilon cluster through NFSv3.

Which recommended configuration addresses the customer's requirements for high availability and throughput?

SmartConnect Advanced with Round Robin connection balancing and dynamic addressing

SmartConnect Basic with Round Robin connection balancing and dynamic addressing

SmartConnect Advanced with Network Throughput connection balancing and dynamic addressing

SmartConnect Advanced with Round Robin connection balancing and static addressing

62. A customer is configuring Isilon SmartConnect. They have determined that their workload primarily consists of short-lived connections, such as HTTP and FTP.

Which load-balancing policy provides the most efficient client distribution?

CPU Utilization

Round Robin

Connection Count

Random Selection

63. An Isilon customer has an environment supporting a wide range of different workloads. They want to assign clients to performance tiers based on the resources needed.

What can the customer use to meet this requirement?

SmartConnect Zones

Load Balancing

Client Connection Zone

SmartPools Advanced

64. If Dynamic IP Address Allocation is being configured in Isilon SmartConnect, which policy setting needs to be determined?

Rebalance

Load Balancing

Static

Dynamic

65. 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?

Disk pool

Node pool

Smart pool

SSD pool

66. 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?

Stage 1

Stage 2

Stage 3

Stage 4

67. If business objectives such as value and SLAs are considered, which Isilon license feature provides the ability to manage performance and the cost of data in a cluster?

SmartPools

SmartConnect

SyncIQ

SmartQuota

68. An Isilon customer wants the ability to provide low latency I/O for their files due to a workflow involving small, random reads and writes.

Which SSD strategy is most effective for this use case?

Data on SSDs

Metadata read acceleration

Metadata read/write acceleration

Avoid SSDs

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

Metadata read acceleration

Metadata read/write acceleration

Data on SSDs

Avoid SSDs

70. A customer has a data retention period of three years. They want a solution in which files cannot be deleted, changed, or modified.

Which Isilon SmartLock version should they implement?

Compliance version

Standard version No WORM

Enterprise version

Standard version with WORM

Page 8 of 8

71. 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?

Latest retention period

Earliest retention period

File-level retention

Directory-level retention

72. An Isilon customer wants to more effectively manage their storage and thereby achieve performance improvements.

Which tool will help improve workflow performance on their cluster?

InsightIQ

Isilon SNMP MIB

SyncIQ

SmartPools

73. In an Isilon environment, how is InsightIQ installed?

Deployed as a virtual appliance

Installed on a FreeBSD server

Deployed on a Windows 64-bit server

Installed on an Isilon cluster

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

10%

20%

75. How does Isilon SnapshotIQ use storage for snapshots?

Through Changed Block Tracking and only changed data blocks are saved

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

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

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

76. 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?

There is no hard limit on snapshots.

There is a limit of 1024 snapshots per cluster.

There is a limit of 2048 snapshots per cluster.

There is a limit of 2048 snapshots per directory.

77. A customer created one month of snapshots; one snapshot every 8 hours for 30 days on an Isilon cluster using SnapshotIQ. They are now deleting the snapshots randomly and experiencing overhead to the cluster.

How can the snapshots be removed while avoiding the overhead caused by this process?

Delete the snapshots in order

Use SmartPools to move the snapshot data to a different tier

Snapshots cannot be deleted

Remove the directory

78. An Isilon customer wants to have different snapshot policies and schedules on the same directory.

Why is this possible on an Isilon cluster?

SnapshotIQ snaps at the directory level rather than the volume level

All snapshots are scheduled through the command line interface

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

SnapshotIQ snaps at the volume level rather than the directory level

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

256

1024

80. A customer has an SMB file directory with 375 TB of data on the primary cluster with a protection level of N +3:1. They want to replicate this directory to the secondary cluster. They are interested in the possibility of setting protection levels on the target cluster.

Which target directory protection level information can be provided?

Does not need to match the source and is configured separately on the target cluster

Must match the source and is configured separately on the target cluster

Cannot be altered and is controlled by SyncIQ

Can be altered by the command line interface and is controlled by SyncIQ