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EMC Dell PowerScale Design 2023 Sample Questions:

1. You are sizing a PowerScale Gen6 cluster for a small organization that is concerned about the availability of the journal during an extended power outage.
What is a consideration when sizing?

A) Journal is replicated to all nodes within a chassis.
B) Battery life within each node is a limiting factor.
C) Journal is written to nonvolatile storage if power is lost.
D) Journal must be protected by an external UPS.

2. What is a consideration when using SnapshotIQ?

A) ROW is used for small changes; COW is used for large changes.
B) COW is used for small changes; ROW is used for large changes.
C) ROW is used for all except inode changes.
D) COW is used for all except large sequential writes.

3. You are asked to size a cluster for a file sharing environment. nfsstat indicates that 75% of the requests are namespace operations (e.g., GETADDR, SETADDR). There will be 8,000 active Linux users, connecting over NFS.
Which cluster configuration would you recommend?

A) Five X400 (66 TB) 48 GB RAM, 1.2 TB SSD, N+2:1
B) Eight X200 (36 TB) 48 GB RAM, no SSD, N+2:1
C) Eight X200 (27 TB) 48 GB RAM, 600 GB SSD, N+2:1
D) Eight X200 (27 TB) 12 GB RAM, 600 GB SSD, N+2

4. 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) Consider migrating data from Isilon to one of their SAN platforms or proposing a new solution to handle the performance requirements of SQL.
B) 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.
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) Suggest the customer consider leveraging SSDs in the new nodes they purchase and GNA to boost the performance of each cluster.

5. Which cache type contains data blocks from previous read and write transactions?

A) L3 cache
B) L1 cache
C) L2 cache
D) Metadata stored on SSDs

Solutions: