E20-555 EMC Exam Questions and Free Practice Test

Question 19

Which tool measures actual throughput and produces sophisticated graphs?

A. MiTrend

B. WireShark

C. Perfmon

D. IOZone

Correct Answer:B

Question 20

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

A. 8

B. 96

C. 256

D. 1024

Correct Answer:D

Question 21

A customer is running OneFS 8.0 on an Isilon cluster consisting exclusively of NL400 nodes. The storage administrator recently heard that OneFS 8.1 provides journal vaulting. What should you advise the storage administrator?

A. Replace the batteries of the battery backed volatile storage with NiMH batteries.

B. Add SSDs to all nodes of the existing cluster and upgrade to OneFS 8.1.

C. Migrate all data from the current Isilon cluster to a Gen 6 cluster.

D. Add a Gen 6 node to the existing Isilon cluster and upgrade to OneFS 8.1.

Correct Answer:D

Question 22

You are asked to size a cluster for a file sharing environment. nfsstat indicates that no more than 10% of the requests are namespace operations (e.g. GETADDR, SETADDR). There will be 10,000 active Linux users, connecting over NFS.
Which cluster configuration would you recommend?

A. Ten X200 (27 TB) 48 GB RAM, 600 GB SSD, N+2:1

B. Five X400 (120 TB) 96 GB RAM, 2.4 TB SSD, N+2

C. Ten X400 (60 TB) 48 GB RAM, 2.4 TB SSD, N+2:1

D. Eight X200 (36 TB) 24 GB RAM, no SSD, N+2:1

Correct Answer:A

Question 23

A telecommunications company has a substantial amount of data. This data is being created by network elements within their environment.
The company wants to change the way the network elements Call Detail Records (CDR) are stored and analyzed. The existing infrastructure consolidates all of the CDRs into a table structure, and then ingests them into a large database. Once ingested, a query engine accesses the database and performs analysis on these files. The system is functional; however, since the amount of CDRs generated will increase exponentially over the next year, the company is open to alternatives for storing and analyzing these records.
In evaluating alternatives, the key requirements are to reduce cost, the amount of storage, and the amount of time to analyze the data. The customer would like to use Hadoop to analyze the CDRs.
After you have conducted an assessment of the workflow, you have recommended an Isilon Cluster to work within the Hadoop environment.
What would be the best recommendation to the customer for the workflow of Hadoop with Isilon?

A. Copy the CDRs from the source to an Isilon cluster with NFS, then use Hadoop to analyze the information directly over HDFS

B. Write the CDRs directly to an Isilon cluster with an NFS mount, then use Hadoop to analyze theinformation directly over HDFS

C. Copy the CDRs from the source to an Isilon cluster with NFS, then ingest the information into Hadoop for analysis

D. Write the CDRs directly to an Isilon cluster with an NFS mount, then ingest the information into Hadoop with NFS then analyze

Correct Answer:C

Question 24

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

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

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

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

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

Correct Answer:A

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