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EMC D-PSC-DS-01 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Network Design for PowerScale | 20% | - Connectivity
|
| Workflow and Design Solutions | 20% | - Solution Validation
|
| Sizing and Design Considerations | 30% | - Storage Efficiency
|
| PowerScale Hardware Concepts and Considerations | 30% | - Cluster Sizing and Configuration
|
EMC Dell PowerScale Design v2 Sample Questions:
1. Your customer purchased an Isilon cluster with eight X400 nodes for Home Directories. Your follow-up discussions have uncovered an opportunity to expand the cluster to support the Legal Department. As you prepare to complete the Workflow Profile Document, you meet with the customer to discuss data protection.
Which key areas should you address?
A) WORM requirements Network ports for replication Snapshots for user restores
B) Default Cluster Protection Level Backup Windows and Processes Concurrency of user access
C) Protocols (SMB, NFS, FTP, HTTP, HDFS) Authentication and Directory Services Performance and Latency Concerns
D) Default Cluster Protection Level Additional Directory Level Protections Snapshots and Replication
2. You are designing a backup solution using an NDMP redirector and throttler.
What is the default threshold percentage of CPU resources that the throttler limits NDMP to?
A) 25
B) 60
C) 50
D) 45
3. A customer is inquiring about expanding their primary cluster consisting of six S-Series nodes in order to improve performance. They have a second cluster with 11 X-Series nodes. Both clusters leverage 1GbE, but the customer recently installed a 10GbE network that can be utilized.
They also have multiple Fibre Channel SAN arrays in their environment. They have a variety of workloads on each cluster and are in the process of determining which workloads belong on which cluster.
They have discovered that one of the workloads- a SQL database that resides on the X-Series node cluster - is experiencing timeouts due to latency. The database vendor has suggested limiting latency to 5ms or less to eliminate these timeouts.
How do you advise the customer?
A) Merge the S-Series nodes and X-Series nodes into one cluster, upgrade the 1GbE to 10GbE, and leverage SmartPools to allow for the cluster to determine where data should reside.
B) Suggest the customer consider leveraging SSDs in the new nodes they purchase and GNA to boost the performance of each cluster.
C) Recommend they increase the amount of DRAM in the cluster or consider an Accelerator node in order to increase the amount of cache in their cluster.
D) Consider migrating data from Isilon to one of their SAN platforms or proposing a new solution to handle the performance requirements of SQL.
4. What form of journaling redundancy is provided by a PowerScale Gen6 cluster?
A) Each node maintains a copy of the peer journal. The local journal is saved on nonvolatile storage.
B) In the event of a node failure, the peer journal is written to nonvolatile storage on the paired node.
C) In the event of a node failure, the peer journal is written to disk on the paired node.
D) Each node maintains a copy of the peer journal. The local journal is saved on battery backed-up storage.
5. When a Gen 6 Isilon cluster receives a file to be stored, which node(s) performs the FEC calculation?
A) Node that will be holding the FEC
B) Each node in the cluster
C) Node to which the client is connected
D) First node in each node pair
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: C | Question # 3 Answer: D | Question # 4 Answer: A | Question # 5 Answer: C |


