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EMC DES-1415 Exam Syllabus Topics:

EMC Specialist - Technology Architect, PowerScale Solutions Sample Questions:

Question 1

How many files can reference a single block within a shadow store?
Response:

A. 32,000
B. 8
C. 512
D. 128

Question 2

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 65% utilized for their video surveillance operations.
They wish to achieve the following:
Upgrade from 1280 x 720 resolution, with a 15 days retention policy, to 2048 x 1536 resolution with a 30 days retention policy.
What is the minimum number of nodes of the same type will you need to add in order to meet the required changes and not exceed 70% raw capacity?
Response:

A. 14 nodes
B. 18 nodes
C. 10 nodes
D. 6 nodes

Question 3

If snapshots are configured for the InsightIQ datastore on Isilon and the datastore is reverted to a previous snapshot, what might be the result?
Response:

A. InsightIQ will not recognize the older copy of the database
B. InsightIQ database will have to be manually copied from the snapshot
C. InsightIQ datastore cannot be reverted
D. InsightIQ datastore could be corrupted

Question 4

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?
Response:

A. Ten X200 (27 TB) 48 GB RAM, 600 GB SSD, N+2:1
B. Eight X200 (36 TB) 24 GB RAM, no SSD, N+2:1
C. Five X400 (120 TB) 96 GB RAM, 2.4 TB SSD, N+2
D. Ten X400 (60 TB) 48 GB RAM, 2.4 TB SSD, N+2:1

Question 5

A telecommunications company has a substantial amount of dat
a. 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?
Response:

A. Copy the CDRs from the source to an Isilon cluster with NFS, then ingest the information into Hadoop for analysis
B. Copy the CDRs from the source to an Isilon cluster with NFS, then use Hadoop to analyze the information directly over HDFS
C. Write the CDRs directly to an Isilon cluster with an NFS mount, then ingest the information into Hadoop with NFS then analyze
D. Write the CDRs directly to an Isilon cluster with an NFS mount, then use Hadoop to analyze the information directly over HDFS

Solutions: