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EMC D-PSC-DS-01 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Data Protection & Availability | - Erasure coding / protection levels
|
| PowerScale Architecture & Fundamentals | - OneFS architecture
|
| Cluster Design & Sizing | - Node selection and performance tiers
|
| Data Management & Storage Efficiency | - Snapshots and protection
|
| Performance & Scalability | - Performance tuning
|
EMC Dell PowerScale Design v2 Sample Questions:
1. What is the key design consideration when selecting switches for a PowerScale environment?
A) Switches must provide built-in cloud tiering support for CloudPools
B) Switches should be capable of executing isi statistics commands
C) Switches must support the required port density, bandwidth, and failover features for node interconnects
D) Switches must support the same RAID level as the cluster
2. 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.
The customer provides the following environment summary from the engineering firm's recently departed IT staff:
- 20 TB of Home Directory data
- 100 TB of active CAD projects
- 400 TB of archived data stored on tape at an offsite warehouse
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?
A) Use a third party backup software and have the Isilon cluster convert the data to LTFS so it can be stored to the tape library.
B) Connect the Tape Library via Fibre Channel to the Isilon cluster and use a third party backup software to initiate an NDMP backup to an accelerator.
C) Use a Backup Accelerator with SynclQ to push the data to the tape library via the Fibre Channel ports on the accelerator.
D) Implement a Backup Accelerator and use the internal backup software within the Isilon cluster to move data to the tape library.
3. When qualifying a CIFS + Hadoop analytics opportunity, what should be done to understand the customer environment?
A) Immediately propose a 2 PB configuration and submit for budget approval
B) Send a sizing spreadsheet to Marketing and request white paper review
C) Create a cluster configuration with HDFS, NFS, and CIFS preselected
D) Interview stakeholders on data access, location, and usage
4. During a write process in OneFS 8.0, from which cache are blocks copied to disk?
A) Endurant
B) L3
C) L1
D) L2
5. A customer is experiencing problems writing data to their PowerScale cluster. You have checked all network settings and authentication sources. No errors are reported on the cluster.
Which command can the customer use to collect information about network activity, network packets, and network latency?
A) isi statistics
B) netstat
C) iostats
D) tcpdump
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: B | Question # 3 Answer: D | Question # 4 Answer: A | Question # 5 Answer: D |






