E20-555 Practice Exam Questions and Answers

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 potential customer requires 4 PB of usable capacity to store media files. The workloads are a combination of streaming video delivery and long term archive of video assets.

There is very little space available in the customer's datacenter, so physical density is very important. The customer is concerned about performance impact and potential data loss when using 3 TB or larger drives.

What Isilon capabilities can address the customer's concerns?

When creating a FilePool policy via the OneFS WebUI, what is the maximum allowed number of condition

blocks?

What accurately represents Isilon SyncIQ Automated Failover?

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 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?

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

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 1Gbps.

Which cluster configuration would best meet the customer's requirements?

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

How many file systems are present in a 20-node Isilon X200 cluster?

You are designing a new Isilon cluster that requires backup to tape for all files in the Legal and Accounting shared folders. The customer has sized their IP network to support the application workload, but no additional bandwidth is available.

What should be recommended for the backup solution?

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

An Isilon has 6 X410 nodes and 4 NL410 nodes. How many job engine directors does the cluster have?

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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.

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The customer has a limited budget. What would be the best price/performance solution for their active data?

Refer to the Exhibit.

What is represented by the information shown?

A 6 × F800 node Isilon cluster has one subnet with two IP pools with LACP aggregated 10GigE interfaces from

all the nodes in the ‘Data-Zone’ Access Zone. The ‘NFS-Pool’ with dynamic IP Allocation schema and ‘SMBPool’

with static IP Allocation schema are being used.

All the Linux clients are accessing Isilon exports using NFSv3 via the ‘NFS_Pool’. All the Windows clients are

accessing Isilon shares using SMBv3 via the ‘SMB_Pool’.

While deploying Isilon, the customer reserves the whole network subnet for Isilon. The customer is facing

performance issues with a new workload that is accessing the Isilon via Kerberized NFSv4.

What is recommended when creating a new IP pool for NFSv4 clients?

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

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?

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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?

Refer to Exhibit below:

What is represented by the information shown in the exhibit?

Which impact policies are available on an Isilon cluster?

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?

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

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 customer plans to deploy N+2d:1n protection on a 5-node Isilon cluster. How much capacity will be used to store a 320 KiB file?

A customer has two data centers (Site A and Site B) and in each data center there is an Isilon cluster. They are replicating data between the sites using SyncIQ.

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

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

  B.  

What is the Recovery Point Objective in this plan?

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?

A healthcare services provider is implementing an X-Series cluster. Currently they have approximately 200 customers and they are growing at 30% per year. They have 200 TB of storage utilized. Health Insurance Portability and Accountability Act (HIPAA) regulations require they keep all patient data for seven (7) years. They would like to keep all genomic sequencing data stored with N+3 protection, not to exceed 75% utilization.

What is the minimum initial configuration you would recommend?

Refer to the exhibit.

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

A customer is evaluating Isilon and Pure FlashBlade solutions. Which protocol is available for both solutions?

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

Refer to the exhibit.

A large hospital chain has approached you to redesign their storage infrastructure. The head of IT believes their requirement is for 100 TB of RAW capacity. They want to consolidate their PACS, file shares and home directories onto one cluster and require very fast enumeration of the directories. The following are the notes from meetings with the department heads.

Which is the best cluster configuration that meets the customer's requirements?

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

protection?

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?

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?

You have been working with a customer to size a new Isilon cluster for their environment. You recently determined that a cluster with three X400 nodes with 1TB drives and 48 GB RAM would be a perfect starting point for their workflow, but will have extra capacity. The customer just informed you that they have decided to also use the cluster for a small home directory environment and implement SmartQuotas.

Which configuration changes should you consider?

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?

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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.

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The CIO approaches you with a new requirement. They would like to reuse the tape library that was previously used for archiving to now be used to back up some of their data.

What do you recommend to the Director of IT as the best architecture to achieve this goal?

Which Isilon feature increases available space by consolidating copies of identical blocks of data?

How many layers are in the Isilon clustering architecture?

Which level of control does RBAC provide for cluster administration roles?

What are attributes of SFTP?

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

At a minimum, how many connected and available nodes are required to maintain quorum in a 25-node cluster?

Your customer has an existing Isilon cluster with seven X200 nodes. The cluster is used to store home directories and departmental shared folders. They are planning to deploy a new application that generates small block, synchronous writes.

Which OneFS 7 capability can help reduce latency for the new workload?

An Isilon customer created a SyncIQ policy to replicate data from a primary cluster to an offsite secondary cluster. The primary cluster becomes unavailable, and the customer has completed a failover onto the secondary cluster.

The primary cluster becomes available again, so the customer would like to fail back data to the primary cluster. The failback process does not replicate data.

What is the most likely reason the failback policy does not replicate data to the primary cluster?

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 cluster has user quotas configured for user’s home directories with hard limits and advisory limits set. What would the default setting be for calculating user quotas on the cluster?

A four node F800 Isilon cluster running OneFS 8.2.1 has a dedicated subnet and IP pool for SMB data traffic.

SmartConnect Advanced license is applied. The SMB IP pool consists of LACP aggregated. 10GigE interfaces from all the nodes.

What is the maximum number of SmartConnect Service IPs recommended for the SMB subnet?

When planning a new cluster using backend leaf-spine topology, what is the maximum number of nodes

supported when using two leaf switches and one spine switch?

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