Your customer has a new VNX solution configured with Flash, SAS, and NL-SAS drives. The customer requires their DSS, VDI, Software Development, and Regulatory Compliance workloads to be distributed between the different drive types. Due to limited drive quantities only one workload type can be configured using Flash drives.
According to best practices, which configuration best assigns the workloads?
A. VDI on Flash drives; DSS on SAS; Software Development on SAS; Regulatory Compliance on NL-SAS
B. DSS on Flash drives; VDI on SAS; Regulatory Compliance on SAS; Software Development on NL-SAS
C. DSS on Flash drives; VDI on SAS; Software Development on SAS; Regulatory Compliance on NL-SAS
D. VDI on Flash drives; DSS on SAS; Regulatory Compliance on SAS; Software Development on NL-SAS
Your customer is designing a Proof of Concept with SQL Server attached to a VNX. The storage design includes seven LUNs on a RAID Group. The system is generally very heavily loaded, with a particularly high load on the cache. This is a very carefully controlled environment and your customer has asked for assistance in planning the layout of the LUN location on the physical spindles.
Where in the RAID Group would you recommend placing the two heavily used LUNs if the physical spindle is fully utilized?
A. Adjacent to each other in the middle
B. One at beginning and one at the end
C. Adjacent to each other at the beginning
D. Evenly placed, as non-adjacent as possible
A customer's database resides on a RAID 5 Pool with SAS drives.
Which best practice should be followed to optimize Reserved LUN Pool disk performance?
A. Use a mix of both SAS and NL-SAS disks from the same Pool as the database
B. Use equal size thin LUNs from the same Pool as the database
C. Use only SAS disks on dedicated RAID Groups
D. Use only NL-SAS II drives on dedicated RAID Groups
Your customer is operating a payment processing application on a Windows Server cluster with the back- end Oracle databases running on Oracle Enterprise Linux (OEL). Both the application and database environments have been presented storage from the customer's VNX solution.
Your customer reports less than optimal performance for their online payment processing application. While utilizing IOSTAT, utlbstat and utlestat, a high load on the buffer cache and I/O system performance issues are found on the database servers.
What is the most likely problem?
A. Redo logs are too small
B. High Amounts of Recursive (SYS) SQL
C. Long Full Table Scans
D. Shortage of rollback segments
Your customer has implemented FAST Cache and FAST VP in their application environment. They have been monitoring drive performance, and have noticed that their Flash drives display increased latency as they become full. Which process can cause the slowdown?
A. Wear leveling
B. Read redirection
C. Slice relocation
D. Chunk promotion
A clone source LUN is 1 TiB in size. It performs 450 random 8 KiB IOPs with a 2:1 R/W ratio. As part of ongoing testing, the clone is fractured for five minutes and then resynchronized. The testing is performed every hour. How much data (to the nearest GiB) is read from the source LUN as part of the resynchronization process?
A. 3 GiB
B. 11 GiB
C. 22 GiB
D. 44 GiB
A customer has deployed a legacy application on their VNX storage system that is configured with NL-SAS drives. They are considering adding an application to this array. They have reviewed the analyzer file and told you that the NL-SAS disk queue length is 8.
What advice would you give them?
A. Consider upgrading their disk technology
B. No immediate changes are necessary
C. There is growth capacity for their environment
D. Modify the SCSI command set to optimize the queue utilization
A customer has a mix of Windows 2003 and Windows 2008 virtualized guests deployed in their vSphere v4 environment. They have purchased a new VNX array and are also upgrading their ESX servers from V4.0 to V5.0.
Their VMware administrators are creating the new target LUNs and VMFS file systems for their datastores. They have noticed that the alignment offset on the new array is not the same as their old array, so they are concerned about disk
crossing on the new array.
How would you respond to the customer?
A. The offset for VMFS-5 is now 1 MiB and will not affect performance of any of the VMs.
B. The offset for VMFS-3 is now 1 MiB and will not affect performance of any of the VMs.
C. The alignment of all VMs will need to be manually adjusted.
D. Windows 2003 VMs will need to be manually adjusted, but Windows 2008 VMs will not be affected.
An Oracle database is stored on an EMC VNX storage array and replicated to a second VNX array at a DR location. EMC RecoverPoint is providing the replication. The customer is currently using a single Consistency Group for the Oracle database.
What would you recommend the customer do to ensure optimal recoverability?
A. Create three Consistency Groups: (1) data files and undo logs; (2) online redo logs; (3) archived redo logs and control files
B. Create two Consistency Groups: (1) data files, control files, and undo logs; (2) online redo logs and archived redo logs
C. Keep the single Consistency Group containing data files, undo logs, online redo logs, archived redo logs, and control files
D. Create two Consistency Groups: (1) data files, online redo logs, undo logs, and control files; (2) archived redo logs
You are designing a VNX for Block solution for a customer. The application is a high throughput OLTP and will require the use of a volume manager to combine multiple LUNs across multiple SPs. Each of the component LUNs resides on a RAID 5 (4+1) RAID Group. Based on best practices, which volume manager stripe element size would you recommend?
A. 64 KB
B. 128 KB
C. 256 KB
D. 1024 KB
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