EMC E20-555 Free Practice Questions

NEW QUESTION 1
-- 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 has a limited budget. What would be the best price/performance solution for their active data?

• A. 14 X-Series nodes with no SSD drives and 96GB of RAM
• B. 17 X-Series nodes with SSD drives and 48GB of RAM.
• C. 14 NL-Series nodes with 24GB of RAM
• D. 12 X-Series nodes with no SSD drives and 24GB of RAM

Answer: A

NEW QUESTION 2
You are sizing an Isilon Cluster for a new customer. Analyzing their workflow, you determine that they have a small block random read workload.
What is the most important factor to consider when sizing this solution?

• A. Headroom
• B. IOPS
• C. Latency
• D. Bandwidth

Answer: B

NEW QUESTION 3
Where is caching for disk blocks staged on an Isilon node?

• A. L2
• B. CPU
• C. L1
• D. RAID

Answer: A

NEW QUESTION 4
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?

• A. Increase the memory and add SSDs to the configuration.
• B. Add an additional X400-Series node to the configuration.
• C. Add three NL-Series nodes with 1 TB drives with 48GB RAM, and use SmartPools.
• D. Add three S-Series nodes with 300GB drives with 48GB RAM, and use SmartPools.

Answer: A

NEW QUESTION 5
You set up a meeting to gather information on a new project with the IT manager and plan to use a workflow profile assessment (WPA) to document the requirements.
Why is it recommended to talk to as many stakeholders as possible?

• A. Helps downstream personnel, such as implementation and delivery, to have a clearer understanding of the requirements.
• B. Completing this document gives sales a list of who the stakeholders are at customer site.
• C. Using workflow profile enables sales to take this information to EMC consulting for review to validate the configuration.
• D. Using the WPA tool will give you the best "big picture" to see things such as block size, de-dupe, file size and volumes.

Answer: A

NEW QUESTION 6
What is the smallest unit of manageable storage within Isilon SmartPools?

• A. SSD pool
• B. Node pool
• C. Disk pool
• D. File pool

Answer: C

NEW QUESTION 7
A potential customer requires 800TB 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 planning to deploy a scale-out NAS solution from a competitor of EMC.
Which factors can demonstrate a lower TCO using Isilon?

• A. An IDC study found that Isilon requires 30% less downtime per year compared to other solutions
• B. Isilon linear scalability eliminates over buying and over provisioning
• C. An IDC study found that Isilon requires 95% less downtime per year compared to other solutions
• D. Isilon uses lower speed NL-SAS drives which reduces overall power and cooling requirements
• E. An IDC study found that Isilon requires 95% less downtime hours per year compared to other competitors
• F. Isilon linear scalability eliminates over buying and over provisioning
• G. An IDC study found that Isilon requires 95% less downtime hours per year compared to other competitors
• H. Isilon linear scalability closely aligns with additional staff requirements as capacity grows

Answer: CF

NEW QUESTION 8
You are designing an Isilon 5-node cluster configuration for a customer who wants to store user home
directories on the new cluster. Each user has 100 small files of 4KB each, 100 medium sized files of 80KB each, and 100 larger files of 512KB each. How much space is occupied by the medium sized files data blocks on an N+1n cluster?

• A. 9,600KB
• B. 15,360KB
• C. 16,000KB
• D. 25,600KB

Answer: A

NEW QUESTION 9
Refer to the exhibit.

A customer calls you and asks if you could come by and interpret their InsightIQ data. You see that namespace reads are 63% of the work load.
What would you recommend to help this cluster's namespace performance?

• A. Add SSDs
• B. Add A-Series nodes
• C. Add S-Series nodes
• D. Turn off write cache

Answer: A

NEW QUESTION 10
Which Isilon job has a default priority of '1'?

• A. MultiScan
• B. Media Scan
• C. FSAnalyze
• D. FlexProtect

Answer: D

NEW QUESTION 11
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. 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?

Answer: B

NEW QUESTION 12
You have been tasked with designing a solution for a company that wants to logically separate access to their Isilon storage by department. Each of their major internal departments currently uses different Active Directory authentication providers. In addition, they want to provide Isilon storage access to these departments while maintaining their authentication separation.
Which feature will provide this functionality?

• A. Access Zones
• B. Network Segmentation
• C. Multi-Homing
• D. VLAN Trunking

Answer: A

NEW QUESTION 13
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?

• A. Use an Avamar NDMP accelerator and dedicated 10Gb/s network interfaces
• B. Use Backup Accelerator nodes for 2-way NDMP
• C. Use Backup Accelerator nodes for 3-way NDMP
• D. Use SmartConnect Advanced and 10Gb/s network interfaces with LACP

Answer: B

NEW QUESTION 14
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?

• A. 3 hours
• B. 4 hours
• C. 5 hours
• D. 6 hours

Answer: B

NEW QUESTION 15
Where does SmartCache stage its write cache?

• A. SSD
• B. DISK
• C. NVRAM
• D. DRAM

Answer: D

NEW QUESTION 16
How many file systems are present in a 20-node Isilon X200 cluster?

• A. 1
• B. 2
• C. 3
• D. 4

Answer: A

NEW QUESTION 17
Using Isilon SnapshotIQ, how many snapshots can be created at the directory level?

• A. 8
• B. 96
• C. 256
• D. 1024

Answer: D

NEW QUESTION 18
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

Answer: A

NEW QUESTION 19
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. Perform Disk Tango
• B. Perform a disk SmartFail
• C. Perform FlexProtect
• D. Perform a node SmartFail

Answer: D

NEW QUESTION 20
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

Answer: A

NEW QUESTION 21
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?

• A. Endurant Cache, L1 cache, disk
• B. L2 cache, L1 cache, disk
• C. Disk, L2 cache, Endurant Cache
• D. L1 cache, L2 cache, disk

Answer: C

NEW QUESTION 22
Which SmartConnect policies are used for workloads that have short lived connections such as HTTP and FTP?

• A. Connection count and round robin
• B. Round robin and CPU usage
• C. Throughput and CPU usage
• D. Throughput and connection count

Answer: C

NEW QUESTION 23
What key considerations should be kept in mind when designing a 300TB solution?

• 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

Answer: A

NEW QUESTION 24
Where does Endurant Cache stage its write cache?

• A. SSD
• B. DISK
• C. NVRAM
• D. DRAM

Answer: B

NEW QUESTION 25
Your customer manages a print media environment, consisting of three Isilon clusters, which are out of support. The customer would like to have access to new software releases and feature sets. You have been asked to perform a full discovery of the customer’s environment.
The customer's current Isilon clusters are as follows:
“Cust” (12 x 12000X) serves as upload media storage for different tenants.
“Working” (8 x 12000X + 6 x X200) serves as a working zone for extraction to RAW and printing media from it.
“Archive” (16 x 72NL + Accelerator nodes) is used to store printed content for six months.
The customer operates in a Windows environment using SMB 2.0, two DNS servers per AD forest, three forest domains which are servicing three different environments. All servers are operating on a 1Gb network, three VLANs segregating the DEV/QA/PROD environments. Currently, there is no monitoring in place for performance measurement or optimization.
The requirements for this solution include:
Better ROI and TCO
Maintain same performance with possible improvements
Renew HW/SW and get inclusive support
Limit migrations
Reduce space, power, cooling consumption
Get new feature sets
If migration required, use Parallel copy (multiple nodes, multiple threads, multiple connections)
Segregate tenant shares from other tenants
Expand up to 1PB of total storage
Which licenses need to be defined for the solution to perform optimally?

• A. HDFS, SmartQuotas, SnapshotIQ, InsightIQ
• B. SmartPools, SnapshotIQ, SyncIQ, SmartLock
• C. InsightIQ, SmartPools, SyncIQ, SmartConnect Advanced
• D. SyncIQ, InsightIQ, SmartPools, Platform API

Answer: B

NEW QUESTION 26
What accurately represents Isilon SyncIQ Automated Failover?

• 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

Answer: C

NEW QUESTION 27
A customer wants to add Unix users to their cluster, and requires that NFS access be fault-tolerant. What would you recommend?

• A. Use NFS v4 and dynamic IP addressing with SmartConnect Basic
• B. Use NFS v4 and dynamic IP addressing with SmartConnect Advanced
• C. Use NFS v3 and dynamic IP addressing with SmartConnect Advanced
• D. Use NFS v3 and dynamic IP addressing with SmartConnect Basic

Answer: B

NEW QUESTION 28
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