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EMC D-PSC-DS-23 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Cluster Design and Planning | - Scalability considerations - Sizing and capacity planning - Workload assessment and performance design |
| Data Protection and Availability | - Erasure coding and replication strategies - Snapshot and snapshotIQ concepts - Failure domains and resilience design |
| Security and Access Control | - Authentication and authorization methods - Data encryption and security design - Role-based access control concepts |
| Networking Design for PowerScale | - Network topology design - Client access and load balancing - SmartConnect configuration concepts |
| PowerScale Architecture and Concepts | - File system layout and data flow - Cluster components and node types - OneFS architecture overview |
| Storage Management and Data Services | - Protocol support (NFS, SMB, HDFS) - Data lifecycle management - SmartPools tiering and data placement |
| Monitoring, Troubleshooting, and Optimization | - Common design troubleshooting scenarios - Performance monitoring tools - Cluster health diagnostics |
EMC Dell PowerScale Design 2023 Sample Questions:
1. 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) Implement a Backup Accelerator and use the internal backup software within the Isilon cluster to move data 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) 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.
2. Which platforms are supported by CloudPools with the initial OneFS 8.0 release?
A) Amazon S3, Microsoft Azure, EMC ECS, and EMC Isilon
B) Microsoft Azure, AT&T Synaptic Cloud, and Amazon S3
C) AT&T Synaptic Cloud, Microsoft Azure, and Rackspace Cloud Files
D) EMC ECS, Amazon S3, Google Cloud Storage, and EMC Isilon
3. Your customer's site uses an old X-Series cluster, and they are interested in consolidating their two primary workflows. iostat shows that one of the applications is sensitive to latency, while isi statistics indicates sensitivity to disk response times. There are approximately 1000 users accessing 70 TB of file data.
Which node type would you recommend?
A) S200
B) NL400
C) X200
D) X400
4. A customer wants to use their large Gen 6 Isilon cluster for ILM. All of their data is written to and read from a single file pool. They need to use multiple file pools, so slightly used data is stored on less expensive, large disks. Heavily used data is stored on a faster tier.
What would satisfy the customer's needs?
A) Enable FAST VP license on each node pair
B) Add an A-series node with SmartPools license
C) Configure SmartPools Advanced
D) Install SmartPools license on the cluster
5. In your second meeting with the customer you ask the following questions about their current unified SAN and NAS platform. "Are you using an application to map users from NFS Exports to SMB shares?
Is each site a separate LDAP or AD Domain?"
What functionality are your trying to understand in their environment and what is the comparable feature in Isilon OneFS?
A) Kerberos Infrastructure and Identity Management
B) User Management and AD Authentication
C) Identity Mapping and Authentication Sources
D) NFS Export Management and OneFS Cluster Management
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A | Question # 3 Answer: A | Question # 4 Answer: D | Question # 5 Answer: C |



