A customer has recently migrated an application from one VNX to another via EMCopy migration. The VNX's hardware is completely identical but they have been experiencing performance issues on the new machine. Their workload primarily consists of small random read access to their file system.
What could be the cause of this?
A. prefetch is enabled on the file system
B. uncached writes are not enabled on the file system
C. noscan is enabled on the file system
D. nolock is enabled on the file system
A customer is trying to determine the correct configuration for an application they are planning to run on a VNX. The application consists of a heavy sequential workload with high (greater than 30%) writes.
Which drive type and configuration would you recommend to the customer?
A. 15k SAS Drives in a RAID 5 configuration
B. 15k SAS Drives in a RAID 1/0 configuration
C. 10k SAS Drives in a RAID 1/0 configuration
D. 10k SAS Drives in a RAID 5 configuration
A customer is trying to determine the correct configuration for an application they are planning to run on a VNX. The application consists of a heavy transactional workload with high (greater than 30%) random writes.
Which drive type and configuration would you recommend to the customer?
A. 15k SAS Drives in a Raid 1/0 configuration
B. 15k SAS Drives in a Raid 5 configuration
C. 10k SAS Drives in a Raid 1/0 configuration
D. 10k SAS Drives in a Raid 5 configuration
Click the calculator icon in the upper left-hand corner.
Your customer has LUNs with a total size of 25,000 GB. The total I/O load is 10,000 IOPS, with a 4:1 R/W ratio. Analysis of your customer's data indicates that data skew is 95%. RAID 5 (4+1) is used exclusively in the environment. How many 200 GB FAST VP optimized Flash drives would be needed to handle the load of the working data set?
A. 5
B. 10
C. 15
D. 20
Why is it important for Pool LUNs to always have the same Default SP owner and Default Allocation owner?
A. So they do not pass data across the CMI bus.
B. In order to utilize the higher bandwidth of the CMI bus
C. The LUNs will be identified as trespassed
D. To eliminate the possibility of LUN trespassing
How do you change the Allocation Owner of a FAST VP pool LUN to match the Default SP owner?
A. The LUN must be migrated to a new LUN with the desired Allocation Owner.
B. Trespass the LUN to the SP of the desired Allocation Owner.
C. Change the Allocation Owner in the LUN properties within Unisphere.
D. Run naviseccli lun -owner to change the Allocation Owner.
When designing a VNX Block Pool layout for a high performance application, how should LUN ownership be assigned?
A. All LUNs in the pool should be owned by the same SP
B. LUNS should be evenly assigned between each SP
C. The LUNs should be distributed so that the majority is owned by the least utilized SP first
D. Avoid assigning any LUNs to the most utilized SP until each SP has the same number of LUNs
Which Unisphere Analyzer metric would you compare with read cache hit/s to determine whether an application's read IO access pattern is random or sequential?
A. Read Throughput
B. Average Busy Queue Length
C. Response Time
D. Prefetch Bandwidth
Which Unisphere Analyzer metric is most useful when determining whether an application's read IO access pattern is random or sequential?
A. Read Cache Hits/s
B. Response Time
C. Prefetch Bandwidth
D. Average Busy Queue Length
Your customer is requesting a way to analyze .nar data without incurring any additional load on the SP during the analysis. What do you recommend?
A. Unisphere VNX Client
B. Mitrend Client
C. CAP2 Tool
D. Unisphere Service Manager (USM)
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