E20-555 Online Practice Questions and Answers

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?

A. 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.

B. 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.

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

D. 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.

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

A. 3

B. 5

C. 6

D. 9

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?

A. SmartPools

B. SmartConnect

C. SyncIQ

D. SmartQuota

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?

A. Delete the snapshots in order

B. Use SmartPools to move the snapshot data to a different tier

C. Snapshots cannot be deleted

D. Remove the directory

A company currently has numerous file servers providing home directories for its employees. Some departments have their own file servers. All corporate users authenticate using Active Directory. The engineering department has their own untrusted AD domain for their file servers.

The company is looking for a consolidated solution that requires minimal changes to the environment, and that creates a single namespace for the home directories.

What is the recommended solution that will meet this company's requirements?

A. Implement an Isilon cluster and utilize Access Zones.

B. Configure two separate clusters, one for each AD domain.

C. Utilize SmartPools to create two pools to separate the domains.

D. Consolidate onto a single cluster and merge the domains.

-- 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.

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

The network receives XDCAM HD footage which is loaded onto their existing Transcoding Storage platform. New footage that needs to be edited will be transferred from their Transcoding Storage platform to the proposed Media Edit Storage

platform at the rate of ten simultaneous XDCAM HD files via FTP. Edited files will be transferred back to the Transcoding Storage platform at the rate of ten simultaneous XDCAM HD files via FTP.

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

compositing as needed.

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

retain all new and edited footage proposed Media Edit Storage as a near-line tier for two years.

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

requirements.

-- Exhibit -

Refer to the exhibit.

Based on the number of edit stations, and their intended use, what bandwidth requirements should be considered while sizing?

A. Write Performance: 70 MBps FTP sequential 21 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random Read Performance: 70 MBps FTP sequential 210 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random

B. Write Performance: 550 MBps FTP sequential 275 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random Read Performance: 550 MBps FTP sequential

1.6 GBps NFS and/or SMB sequential

120 MBps NFS and/or SMB random

C. Write Performance: 21 MBps FTP sequential 70 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random Read Performance: 210 MBps FTP sequential 70 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random

D. Write Performance: 70 MBps FTP sequential 210 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random Read Performance: 70 MBps FTP sequential 21 MBps NFS and/or SMB sequential 120 MBps NFS and/or SMB random

There is a requirement to use dynamic link aggregation to maximize throughput and resiliency on a new Isilon cluster servicing SMB and NFS data. What is the recommended configuration for the physical network interfaces?

A. FEC

B. Round robin

C. Active/passive failover

D. LACP

Which tool measures actual throughput and produces sophisticated graphs?

A. MiTrend

B. WireShark

C. Perfmon

D. IOZone

Three jobs of different exclusion sets with a priority level of 5 are concurrently running on a cluster. A new job with a priority of 4 needs to be run. What does the Job Engine do?

A. Pauses a priority 5 job and runs the new job until completion, then restarts the paused job from the beginning

B. Pauses all priority 5 jobs and runs the new job until completion, then restarts the paused job

C. Queues the old job of the same exclusion set until the job with a higher priority completes

D. Runs the new job in parallel with the other running jobs